PCRE version 5.0 13-Sep-2004 /(a)b|/ Capturing subpattern count = 1 No options No first char No need char /abc/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'c' abc 0: abc defabc 0: abc \Aabc 0: abc *** Failers No match \Adefabc No match ABC No match /^abc/ Capturing subpattern count = 0 Options: anchored No first char No need char abc 0: abc \Aabc 0: abc *** Failers No match defabc No match \Adefabc No match /a+bc/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' Need char = 'c' /a*bc/ Capturing subpattern count = 0 Partial matching not supported No options No first char Need char = 'c' /a{3}bc/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' Need char = 'c' /(abc|a+z)/ Capturing subpattern count = 1 Partial matching not supported No options First char = 'a' No need char /^abc$/ Capturing subpattern count = 0 Options: anchored No first char No need char abc 0: abc *** Failers No match def\nabc No match /ab\gdef/X Failed: unrecognized character follows \ at offset 3 /(?X)ab\gdef/X Failed: unrecognized character follows \ at offset 7 /x{5,4}/ Failed: numbers out of order in {} quantifier at offset 5 /z{65536}/ Failed: number too big in {} quantifier at offset 7 /[abcd/ Failed: missing terminating ] for character class at offset 5 /(?X)[\B]/ Failed: invalid escape sequence in character class at offset 6 /[z-a]/ Failed: range out of order in character class at offset 3 /^*/ Failed: nothing to repeat at offset 1 /(abc/ Failed: missing ) at offset 4 /(?# abc/ Failed: missing ) after comment at offset 7 /(?z)abc/ Failed: unrecognized character after (? at offset 2 /.*b/ Capturing subpattern count = 0 Partial matching not supported No options First char at start or follows \n Need char = 'b' /.*?b/ Capturing subpattern count = 0 Partial matching not supported No options First char at start or follows \n Need char = 'b' /cat|dog|elephant/ Capturing subpattern count = 0 No options No first char No need char this sentence eventually mentions a cat 0: cat this sentences rambles on and on for a while and then reaches elephant 0: elephant /cat|dog|elephant/S Capturing subpattern count = 0 No options No first char No need char Starting byte set: c d e this sentence eventually mentions a cat 0: cat this sentences rambles on and on for a while and then reaches elephant 0: elephant /cat|dog|elephant/iS Capturing subpattern count = 0 Options: caseless No first char No need char Starting byte set: C D E c d e this sentence eventually mentions a CAT cat 0: CAT this sentences rambles on and on for a while to elephant ElePhant 0: elephant /a|[bcd]/S Capturing subpattern count = 0 No options No first char No need char Starting byte set: a b c d /(a|[^\dZ])/S Capturing subpattern count = 1 No options No first char No need char Starting byte set: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19 \x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( ) * + , - . / : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y [ \ ] ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~ \x7f \x80 \x81 \x82 \x83 \x84 \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e \x8f \x90 \x91 \x92 \x93 \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d \x9e \x9f \xa0 \xa1 \xa2 \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac \xad \xae \xaf \xb0 \xb1 \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc \xbd \xbe \xbf \xc0 \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb \xcc \xcd \xce \xcf \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda \xdb \xdc \xdd \xde \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9 \xea \xeb \xec \xed \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9 \xfa \xfb \xfc \xfd \xfe \xff /(a|b)*[\s]/S Capturing subpattern count = 1 No options No first char No need char Starting byte set: \x09 \x0a \x0c \x0d \x20 a b /(ab\2)/ Failed: reference to non-existent subpattern at offset 6 /{4,5}abc/ Failed: nothing to repeat at offset 4 /(a)(b)(c)\2/ Capturing subpattern count = 3 Max back reference = 2 No options First char = 'a' Need char = 'c' abcb 0: abcb 1: a 2: b 3: c \O0abcb Matched, but too many substrings \O3abcb Matched, but too many substrings 0: abcb \O6abcb Matched, but too many substrings 0: abcb 1: a \O9abcb Matched, but too many substrings 0: abcb 1: a 2: b \O12abcb 0: abcb 1: a 2: b 3: c /(a)bc|(a)(b)\2/ Capturing subpattern count = 3 Max back reference = 2 No options First char = 'a' No need char abc 0: abc 1: a \O0abc Matched, but too many substrings \O3abc Matched, but too many substrings 0: abc \O6abc 0: abc 1: a aba 0: aba 1: 2: a 3: b \O0aba Matched, but too many substrings \O3aba Matched, but too many substrings 0: aba \O6aba Matched, but too many substrings 0: aba 1: \O9aba Matched, but too many substrings 0: aba 1: 2: a \O12aba 0: aba 1: 2: a 3: b /abc$/E Capturing subpattern count = 0 Options: dollar_endonly First char = 'a' Need char = 'c' abc 0: abc *** Failers No match abc\n No match abc\ndef No match /(a)(b)(c)(d)(e)\6/ Failed: reference to non-existent subpattern at offset 17 /the quick brown fox/ Capturing subpattern count = 0 No options First char = 't' Need char = 'x' the quick brown fox 0: the quick brown fox this is a line with the quick brown fox 0: the quick brown fox /the quick brown fox/A Capturing subpattern count = 0 Options: anchored No first char No need char the quick brown fox 0: the quick brown fox *** Failers No match this is a line with the quick brown fox No match /ab(?z)cd/ Failed: unrecognized character after (? at offset 4 /^abc|def/ Capturing subpattern count = 0 No options No first char No need char abcdef 0: abc abcdef\B 0: def /.*((abc)$|(def))/ Capturing subpattern count = 3 Partial matching not supported No options First char at start or follows \n No need char defabc 0: defabc 1: abc 2: abc \Zdefabc 0: def 1: def 2: 3: def /abc/P abc 0: abc *** Failers No match: POSIX code 17: match failed /^abc|def/P abcdef 0: abc abcdef\B 0: def /.*((abc)$|(def))/P defabc 0: defabc 1: abc 2: abc \Zdefabc 0: def 1: def 3: def /the quick brown fox/P the quick brown fox 0: the quick brown fox *** Failers No match: POSIX code 17: match failed The Quick Brown Fox No match: POSIX code 17: match failed /the quick brown fox/Pi the quick brown fox 0: the quick brown fox The Quick Brown Fox 0: The Quick Brown Fox /abc.def/P *** Failers No match: POSIX code 17: match failed abc\ndef No match: POSIX code 17: match failed /abc$/P abc 0: abc abc\n 0: abc /(abc)\2/P Failed: POSIX code 15: bad back reference at offset 7 /(abc\1)/P abc No match: POSIX code 17: match failed /)/ Failed: unmatched parentheses at offset 0 /a[]b/ Failed: missing terminating ] for character class at offset 4 /[^aeiou ]{3,}/ Capturing subpattern count = 0 Partial matching not supported No options No first char No need char co-processors, and for 0: -pr /<.*>/ Capturing subpattern count = 0 Partial matching not supported No options First char = '<' Need char = '>' abcghinop 0: ghi /<.*?>/ Capturing subpattern count = 0 Partial matching not supported No options First char = '<' Need char = '>' abcghinop 0: /<.*>/U Capturing subpattern count = 0 Partial matching not supported Options: ungreedy First char = '<' Need char = '>' abcghinop 0: /(?U)<.*>/ Capturing subpattern count = 0 Partial matching not supported Options: ungreedy First char = '<' Need char = '>' abcghinop 0: /<.*?>/U Capturing subpattern count = 0 Partial matching not supported Options: ungreedy First char = '<' Need char = '>' abcghinop 0: ghi /={3,}/U Capturing subpattern count = 0 Partial matching not supported Options: ungreedy First char = '=' Need char = '=' abc========def 0: === /(?U)={3,}?/ Capturing subpattern count = 0 Partial matching not supported Options: ungreedy First char = '=' Need char = '=' abc========def 0: ======== /(?^abc)/m Capturing subpattern count = 0 Options: multiline First char at start or follows \n Need char = 'c' abc 0: abc def\nabc 0: abc *** Failers No match defabc No match /(?<=ab(c+)d)ef/ Failed: lookbehind assertion is not fixed length at offset 11 /(?<=ab(?<=c+)d)ef/ Failed: lookbehind assertion is not fixed length at offset 12 /(?<=ab(c|de)f)g/ Failed: lookbehind assertion is not fixed length at offset 13 /The next three are in testinput2 because they have variable length branches/ Capturing subpattern count = 0 No options First char = 'T' Need char = 's' /(?<=bullock|donkey)-cart/ Capturing subpattern count = 0 No options First char = '-' Need char = 't' the bullock-cart 0: -cart a donkey-cart race 0: -cart *** Failers No match cart No match horse-and-cart No match /(?<=ab(?i)x|y|z)/ Capturing subpattern count = 0 No options Case state changes No first char No need char /(?>.*)(?<=(abcd)|(xyz))/ Capturing subpattern count = 2 Partial matching not supported No options First char at start or follows \n No need char alphabetabcd 0: alphabetabcd 1: abcd endingxyz 0: endingxyz 1: 2: xyz /(?<=ab(?i)x(?-i)y|(?i)z|b)ZZ/ Capturing subpattern count = 0 No options Case state changes First char = 'Z' Need char = 'Z' abxyZZ 0: ZZ abXyZZ 0: ZZ ZZZ 0: ZZ zZZ 0: ZZ bZZ 0: ZZ BZZ 0: ZZ *** Failers No match ZZ No match abXYZZ No match zzz No match bzz No match /(? 3: f 1G a (1) 2G (0) 3G f (1) get substring 4 failed -7 0L adef 1L a 2L 3L f bcdef\G1\G2\G3\G4\L 0: bcdef 1: bc 2: bc 3: f 1G bc (2) 2G bc (2) 3G f (1) get substring 4 failed -7 0L bcdef 1L bc 2L bc 3L f adefghijk\C0 0: adef 1: a 2: 3: f 0C adef (4) /^abc\00def/ Capturing subpattern count = 0 Options: anchored No first char No need char abc\00def\L\C0 0: abc\x00def 0C abc (7) 0L abc /word ((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )?)?)?)?)?)?)?)?)?otherword/M Memory allocation (code space): 432 Capturing subpattern count = 8 Partial matching not supported No options First char = 'w' Need char = 'd' /.*X/D ------------------------------------------------------------------ 0 7 Bra 0 3 Any* 5 X 7 7 Ket 10 End ------------------------------------------------------------------ Capturing subpattern count = 0 Partial matching not supported No options First char at start or follows \n Need char = 'X' /.*X/Ds ------------------------------------------------------------------ 0 7 Bra 0 3 Any* 5 X 7 7 Ket 10 End ------------------------------------------------------------------ Capturing subpattern count = 0 Partial matching not supported Options: anchored dotall No first char Need char = 'X' /(.*X|^B)/D ------------------------------------------------------------------ 0 19 Bra 0 3 7 Bra 1 6 Any* 8 X 10 6 Alt 13 ^ 14 B 16 13 Ket 19 19 Ket 22 End ------------------------------------------------------------------ Capturing subpattern count = 1 Partial matching not supported No options First char at start or follows \n No need char /(.*X|^B)/Ds ------------------------------------------------------------------ 0 19 Bra 0 3 7 Bra 1 6 Any* 8 X 10 6 Alt 13 ^ 14 B 16 13 Ket 19 19 Ket 22 End ------------------------------------------------------------------ Capturing subpattern count = 1 Partial matching not supported Options: anchored dotall No first char No need char /(?s)(.*X|^B)/D ------------------------------------------------------------------ 0 19 Bra 0 3 7 Bra 1 6 Any* 8 X 10 6 Alt 13 ^ 14 B 16 13 Ket 19 19 Ket 22 End ------------------------------------------------------------------ Capturing subpattern count = 1 Partial matching not supported Options: anchored dotall No first char No need char /(?s:.*X|^B)/D ------------------------------------------------------------------ 0 25 Bra 0 3 9 Bra 0 6 04 Opt 8 Any* 10 X 12 8 Alt 15 04 Opt 17 ^ 18 B 20 17 Ket 23 00 Opt 25 25 Ket 28 End ------------------------------------------------------------------ Capturing subpattern count = 0 Partial matching not supported No options First char at start or follows \n No need char /\Biss\B/+ Capturing subpattern count = 0 No options First char = 'i' Need char = 's' Mississippi 0: iss 0+ issippi /\Biss\B/+P Mississippi 0: iss 0+ issippi /iss/G+ Capturing subpattern count = 0 No options First char = 'i' Need char = 's' Mississippi 0: iss 0+ issippi 0: iss 0+ ippi /\Biss\B/G+ Capturing subpattern count = 0 No options First char = 'i' Need char = 's' Mississippi 0: iss 0+ issippi /\Biss\B/g+ Capturing subpattern count = 0 No options First char = 'i' Need char = 's' Mississippi 0: iss 0+ issippi 0: iss 0+ ippi *** Failers No match Mississippi\A No match /(?<=[Ms])iss/g+ Capturing subpattern count = 0 No options First char = 'i' Need char = 's' Mississippi 0: iss 0+ issippi 0: iss 0+ ippi /(?<=[Ms])iss/G+ Capturing subpattern count = 0 No options First char = 'i' Need char = 's' Mississippi 0: iss 0+ issippi /^iss/g+ Capturing subpattern count = 0 Options: anchored No first char No need char ississippi 0: iss 0+ issippi /.*iss/g+ Capturing subpattern count = 0 Partial matching not supported No options First char at start or follows \n Need char = 's' abciss\nxyzisspqr 0: abciss 0+ \x0axyzisspqr 0: xyziss 0+ pqr /.i./+g Capturing subpattern count = 0 No options No first char Need char = 'i' Mississippi 0: Mis 0+ sissippi 0: sis 0+ sippi 0: sip 0+ pi Mississippi\A 0: Mis 0+ sissippi 0: sis 0+ sippi 0: sip 0+ pi Missouri river 0: Mis 0+ souri river 0: ri 0+ river 0: riv 0+ er Missouri river\A 0: Mis 0+ souri river /^.is/+g Capturing subpattern count = 0 Options: anchored No first char No need char Mississippi 0: Mis 0+ sissippi /^ab\n/g+ Capturing subpattern count = 0 Options: anchored No first char No need char ab\nab\ncd 0: ab\x0a 0+ ab\x0acd /^ab\n/mg+ Capturing subpattern count = 0 Options: multiline First char at start or follows \n Need char = 10 ab\nab\ncd 0: ab\x0a 0+ ab\x0acd 0: ab\x0a 0+ cd /abc/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'c' /abc|bac/ Capturing subpattern count = 0 No options No first char Need char = 'c' /(abc|bac)/ Capturing subpattern count = 1 No options No first char Need char = 'c' /(abc|(c|dc))/ Capturing subpattern count = 2 No options No first char Need char = 'c' /(abc|(d|de)c)/ Capturing subpattern count = 2 No options No first char Need char = 'c' /a*/ Capturing subpattern count = 0 Partial matching not supported No options No first char No need char /a+/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' No need char /(baa|a+)/ Capturing subpattern count = 1 Partial matching not supported No options No first char Need char = 'a' /a{0,3}/ Capturing subpattern count = 0 Partial matching not supported No options No first char No need char /baa{3,}/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'b' Need char = 'a' /"([^\\"]+|\\.)*"/ Capturing subpattern count = 1 Partial matching not supported No options First char = '"' Need char = '"' /(abc|ab[cd])/ Capturing subpattern count = 1 No options First char = 'a' No need char /(a|.)/ Capturing subpattern count = 1 No options No first char No need char /a|ba|\w/ Capturing subpattern count = 0 No options No first char No need char /abc(?=pqr)/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'r' /...(?<=abc)/ Capturing subpattern count = 0 No options No first char No need char /abc(?!pqr)/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'c' /ab./ Capturing subpattern count = 0 No options First char = 'a' Need char = 'b' /ab[xyz]/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'b' /abc*/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' Need char = 'b' /ab.c*/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' Need char = 'b' /a.c*/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' No need char /.c*/ Capturing subpattern count = 0 Partial matching not supported No options No first char No need char /ac*/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' No need char /(a.c*|b.c*)/ Capturing subpattern count = 1 Partial matching not supported No options No first char No need char /a.c*|aba/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' No need char /.+a/ Capturing subpattern count = 0 Partial matching not supported No options No first char Need char = 'a' /(?=abcda)a.*/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' Need char = 'a' /(?=a)a.*/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' No need char /a(b)*/ Capturing subpattern count = 1 No options First char = 'a' No need char /a\d*/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' No need char /ab\d*/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' Need char = 'b' /a(\d)*/ Capturing subpattern count = 1 No options First char = 'a' No need char /abcde{0,0}/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'd' /ab\d+/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' Need char = 'b' /a(?(1)b)/ Capturing subpattern count = 0 No options First char = 'a' No need char /a(?(1)bag|big)/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'g' /a(?(1)bag|big)*/ Capturing subpattern count = 0 No options First char = 'a' No need char /a(?(1)bag|big)+/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'g' /a(?(1)b..|b..)/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'b' /ab\d{0}e/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'e' /a?b?/ Capturing subpattern count = 0 No options No first char No need char a 0: a b 0: b ab 0: ab \ 0: *** Failers 0: \N No match /|-/ Capturing subpattern count = 0 No options No first char No need char abcd 0: -abc 0: \Nab-c 0: - *** Failers 0: \Nabc No match /a*(b+)(z)(z)/P aaaabbbbzzzz 0: aaaabbbbzz 1: bbbb 2: z 3: z aaaabbbbzzzz\O0 aaaabbbbzzzz\O1 0: aaaabbbbzz aaaabbbbzzzz\O2 0: aaaabbbbzz 1: bbbb aaaabbbbzzzz\O3 0: aaaabbbbzz 1: bbbb 2: z aaaabbbbzzzz\O4 0: aaaabbbbzz 1: bbbb 2: z 3: z aaaabbbbzzzz\O5 0: aaaabbbbzz 1: bbbb 2: z 3: z /^.?abcd/S Capturing subpattern count = 0 Options: anchored No first char Need char = 'd' Study returned NULL /\( # ( at start (?: # Non-capturing bracket (?>[^()]+) # Either a sequence of non-brackets (no backtracking) | # Or (?R) # Recurse - i.e. nested bracketed string )* # Zero or more contents \) # Closing ) /x Capturing subpattern count = 0 Partial matching not supported Options: extended First char = '(' Need char = ')' (abcd) 0: (abcd) (abcd)xyz 0: (abcd) xyz(abcd) 0: (abcd) (ab(xy)cd)pqr 0: (ab(xy)cd) (ab(xycd)pqr 0: (xycd) () abc () 0: () 12(abcde(fsh)xyz(foo(bar))lmno)89 0: (abcde(fsh)xyz(foo(bar))lmno) *** Failers No match abcd No match abcd) No match (abcd No match /\( ( (?>[^()]+) | (?R) )* \) /xg Capturing subpattern count = 1 Partial matching not supported Options: extended First char = '(' Need char = ')' (ab(xy)cd)pqr 0: (ab(xy)cd) 1: cd 1(abcd)(x(y)z)pqr 0: (abcd) 1: abcd 0: (x(y)z) 1: z /\( (?: (?>[^()]+) | (?R) ) \) /x Capturing subpattern count = 0 Partial matching not supported Options: extended First char = '(' Need char = ')' (abcd) 0: (abcd) (ab(xy)cd) 0: (xy) (a(b(c)d)e) 0: (c) ((ab)) 0: ((ab)) *** Failers No match () No match /\( (?: (?>[^()]+) | (?R) )? \) /x Capturing subpattern count = 0 Partial matching not supported Options: extended First char = '(' Need char = ')' () 0: () 12(abcde(fsh)xyz(foo(bar))lmno)89 0: (fsh) /\( ( (?>[^()]+) | (?R) )* \) /x Capturing subpattern count = 1 Partial matching not supported Options: extended First char = '(' Need char = ')' (ab(xy)cd) 0: (ab(xy)cd) 1: cd /\( ( ( (?>[^()]+) | (?R) )* ) \) /x Capturing subpattern count = 2 Partial matching not supported Options: extended First char = '(' Need char = ')' (ab(xy)cd) 0: (ab(xy)cd) 1: ab(xy)cd 2: cd /\( (123)? ( ( (?>[^()]+) | (?R) )* ) \) /x Capturing subpattern count = 3 Partial matching not supported Options: extended First char = '(' Need char = ')' (ab(xy)cd) 0: (ab(xy)cd) 1: 2: ab(xy)cd 3: cd (123ab(xy)cd) 0: (123ab(xy)cd) 1: 123 2: ab(xy)cd 3: cd /\( ( (123)? ( (?>[^()]+) | (?R) )* ) \) /x Capturing subpattern count = 3 Partial matching not supported Options: extended First char = '(' Need char = ')' (ab(xy)cd) 0: (ab(xy)cd) 1: ab(xy)cd 2: 3: cd (123ab(xy)cd) 0: (123ab(xy)cd) 1: 123ab(xy)cd 2: 123 3: cd /\( (((((((((( ( (?>[^()]+) | (?R) )* )))))))))) \) /x Capturing subpattern count = 11 Partial matching not supported Options: extended First char = '(' Need char = ')' (ab(xy)cd) 0: (ab(xy)cd) 1: ab(xy)cd 2: ab(xy)cd 3: ab(xy)cd 4: ab(xy)cd 5: ab(xy)cd 6: ab(xy)cd 7: ab(xy)cd 8: ab(xy)cd 9: ab(xy)cd 10: ab(xy)cd 11: cd /\( ( ( (?>[^()<>]+) | ((?>[^()]+)) | (?R) )* ) \) /x Capturing subpattern count = 3 Partial matching not supported Options: extended First char = '(' Need char = ')' (abcd(xyz

qrs)123) 0: (abcd(xyz

qrs)123) 1: abcd(xyz

qrs)123 2: 123 3: /\( ( ( (?>[^()]+) | ((?R)) )* ) \) /x Capturing subpattern count = 3 Partial matching not supported Options: extended First char = '(' Need char = ')' (ab(cd)ef) 0: (ab(cd)ef) 1: ab(cd)ef 2: ef 3: (cd) (ab(cd(ef)gh)ij) 0: (ab(cd(ef)gh)ij) 1: ab(cd(ef)gh)ij 2: ij 3: (cd(ef)gh) /^[[:alnum:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [0-9A-Za-z] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:^alnum:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [\x00-/:-@[-`{-\xff] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:alpha:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [A-Za-z] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:^alpha:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [\x00-@[-`{-\xff] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:ascii:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [\x00-\x7f] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:^ascii:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [\x80-\xff] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:blank:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [\x09 ] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:cntrl:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [\x00-\x1f\x7f] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:digit:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [0-9] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:graph:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [!-~] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:lower:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [a-z] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:print:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [ -~] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:punct:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [!-/:-@[-`{-~] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:space:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [\x09-\x0d ] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:upper:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [A-Z] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:xdigit:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [0-9A-Fa-f] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:word:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [0-9A-Z_a-z] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:^cntrl:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [ -~\x80-\xff] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[12[:^digit:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [\x00-/12:-\xff] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /^[[:^blank:]]/D ------------------------------------------------------------------ 0 37 Bra 0 3 ^ 4 [\x00-\x08\x0a-\x1f!-\xff] 37 37 Ket 40 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: anchored No first char No need char /[01[:alpha:]%]/D ------------------------------------------------------------------ 0 36 Bra 0 3 [%01A-Za-z] 36 36 Ket 39 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options No first char No need char /[[.ch.]]/ Failed: POSIX collating elements are not supported at offset 1 /[[=ch=]]/ Failed: POSIX collating elements are not supported at offset 1 /[[:rhubarb:]]/ Failed: unknown POSIX class name at offset 3 /[[:upper:]]/i Capturing subpattern count = 0 Options: caseless No first char No need char A 0: A a 0: a /[[:lower:]]/i Capturing subpattern count = 0 Options: caseless No first char No need char A 0: A a 0: a /((?-i)[[:lower:]])[[:lower:]]/i Capturing subpattern count = 1 Options: caseless Case state changes No first char No need char ab 0: ab 1: a aB 0: aB 1: a *** Failers 0: ai 1: a Ab No match AB No match /[\200-\410]/ Failed: range out of order in character class at offset 9 /^(?(0)f|b)oo/ Failed: invalid condition (?(0) at offset 5 /This one's here because of the large output vector needed/ Capturing subpattern count = 0 No options First char = 'T' Need char = 'd' /(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\w+)\s+(\270)/ Capturing subpattern count = 271 Max back reference = 270 Partial matching not supported No options No first char No need char \O900 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC 0: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC 1: 1 2: 2 3: 3 4: 4 5: 5 6: 6 7: 7 8: 8 9: 9 10: 10 11: 11 12: 12 13: 13 14: 14 15: 15 16: 16 17: 17 18: 18 19: 19 20: 20 21: 21 22: 22 23: 23 24: 24 25: 25 26: 26 27: 27 28: 28 29: 29 30: 30 31: 31 32: 32 33: 33 34: 34 35: 35 36: 36 37: 37 38: 38 39: 39 40: 40 41: 41 42: 42 43: 43 44: 44 45: 45 46: 46 47: 47 48: 48 49: 49 50: 50 51: 51 52: 52 53: 53 54: 54 55: 55 56: 56 57: 57 58: 58 59: 59 60: 60 61: 61 62: 62 63: 63 64: 64 65: 65 66: 66 67: 67 68: 68 69: 69 70: 70 71: 71 72: 72 73: 73 74: 74 75: 75 76: 76 77: 77 78: 78 79: 79 80: 80 81: 81 82: 82 83: 83 84: 84 85: 85 86: 86 87: 87 88: 88 89: 89 90: 90 91: 91 92: 92 93: 93 94: 94 95: 95 96: 96 97: 97 98: 98 99: 99 100: 100 101: 101 102: 102 103: 103 104: 104 105: 105 106: 106 107: 107 108: 108 109: 109 110: 110 111: 111 112: 112 113: 113 114: 114 115: 115 116: 116 117: 117 118: 118 119: 119 120: 120 121: 121 122: 122 123: 123 124: 124 125: 125 126: 126 127: 127 128: 128 129: 129 130: 130 131: 131 132: 132 133: 133 134: 134 135: 135 136: 136 137: 137 138: 138 139: 139 140: 140 141: 141 142: 142 143: 143 144: 144 145: 145 146: 146 147: 147 148: 148 149: 149 150: 150 151: 151 152: 152 153: 153 154: 154 155: 155 156: 156 157: 157 158: 158 159: 159 160: 160 161: 161 162: 162 163: 163 164: 164 165: 165 166: 166 167: 167 168: 168 169: 169 170: 170 171: 171 172: 172 173: 173 174: 174 175: 175 176: 176 177: 177 178: 178 179: 179 180: 180 181: 181 182: 182 183: 183 184: 184 185: 185 186: 186 187: 187 188: 188 189: 189 190: 190 191: 191 192: 192 193: 193 194: 194 195: 195 196: 196 197: 197 198: 198 199: 199 200: 200 201: 201 202: 202 203: 203 204: 204 205: 205 206: 206 207: 207 208: 208 209: 209 210: 210 211: 211 212: 212 213: 213 214: 214 215: 215 216: 216 217: 217 218: 218 219: 219 220: 220 221: 221 222: 222 223: 223 224: 224 225: 225 226: 226 227: 227 228: 228 229: 229 230: 230 231: 231 232: 232 233: 233 234: 234 235: 235 236: 236 237: 237 238: 238 239: 239 240: 240 241: 241 242: 242 243: 243 244: 244 245: 245 246: 246 247: 247 248: 248 249: 249 250: 250 251: 251 252: 252 253: 253 254: 254 255: 255 256: 256 257: 257 258: 258 259: 259 260: 260 261: 261 262: 262 263: 263 264: 264 265: 265 266: 266 267: 267 268: 268 269: 269 270: ABC 271: ABC /This one's here because Perl does this differently and PCRE can't at present/ Capturing subpattern count = 0 No options First char = 'T' Need char = 't' /(main(O)?)+/ Capturing subpattern count = 2 No options First char = 'm' Need char = 'n' mainmain 0: mainmain 1: main mainOmain 0: mainOmain 1: main 2: O /These are all cases where Perl does it differently (nested captures)/ Capturing subpattern count = 1 No options First char = 'T' Need char = 's' /^(a(b)?)+$/ Capturing subpattern count = 2 Options: anchored No first char No need char aba 0: aba 1: a 2: b /^(aa(bb)?)+$/ Capturing subpattern count = 2 Options: anchored No first char No need char aabbaa 0: aabbaa 1: aa 2: bb /^(aa|aa(bb))+$/ Capturing subpattern count = 2 Options: anchored No first char No need char aabbaa 0: aabbaa 1: aa 2: bb /^(aa(bb)??)+$/ Capturing subpattern count = 2 Options: anchored No first char No need char aabbaa 0: aabbaa 1: aa 2: bb /^(?:aa(bb)?)+$/ Capturing subpattern count = 1 Options: anchored No first char No need char aabbaa 0: aabbaa 1: bb /^(aa(b(b))?)+$/ Capturing subpattern count = 3 Options: anchored No first char No need char aabbaa 0: aabbaa 1: aa 2: bb 3: b /^(?:aa(b(b))?)+$/ Capturing subpattern count = 2 Options: anchored No first char No need char aabbaa 0: aabbaa 1: bb 2: b /^(?:aa(b(?:b))?)+$/ Capturing subpattern count = 1 Options: anchored No first char No need char aabbaa 0: aabbaa 1: bb /^(?:aa(bb(?:b))?)+$/ Capturing subpattern count = 1 Options: anchored No first char No need char aabbbaa 0: aabbbaa 1: bbb /^(?:aa(b(?:bb))?)+$/ Capturing subpattern count = 1 Options: anchored No first char No need char aabbbaa 0: aabbbaa 1: bbb /^(?:aa(?:b(b))?)+$/ Capturing subpattern count = 1 Options: anchored No first char No need char aabbaa 0: aabbaa 1: b /^(?:aa(?:b(bb))?)+$/ Capturing subpattern count = 1 Options: anchored No first char No need char aabbbaa 0: aabbbaa 1: bb /^(aa(b(bb))?)+$/ Capturing subpattern count = 3 Options: anchored No first char No need char aabbbaa 0: aabbbaa 1: aa 2: bbb 3: bb /^(aa(bb(bb))?)+$/ Capturing subpattern count = 3 Options: anchored No first char No need char aabbbbaa 0: aabbbbaa 1: aa 2: bbbb 3: bb /--------------------------------------------------------------------/ Capturing subpattern count = 0 No options First char = '-' Need char = '-' /#/xMD Memory allocation (code space): 7 ------------------------------------------------------------------ 0 3 Bra 0 3 3 Ket 6 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: extended No first char No need char /a#/xMD Memory allocation (code space): 9 ------------------------------------------------------------------ 0 5 Bra 0 3 a 5 5 Ket 8 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: extended First char = 'a' No need char /[\s]/D ------------------------------------------------------------------ 0 36 Bra 0 3 [\x09\x0a\x0c\x0d ] 36 36 Ket 39 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options No first char No need char /[\S]/D ------------------------------------------------------------------ 0 36 Bra 0 3 [\x00-\x08\x0b\x0e-\x1f!-\xff] 36 36 Ket 39 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options No first char No need char /a(?i)b/D ------------------------------------------------------------------ 0 9 Bra 0 3 a 5 01 Opt 7 NC b 9 9 Ket 12 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options Case state changes First char = 'a' Need char = 'b' (caseless) ab 0: ab aB 0: aB *** Failers No match AB No match /(a(?i)b)/D ------------------------------------------------------------------ 0 17 Bra 0 3 9 Bra 1 6 a 8 01 Opt 10 NC b 12 9 Ket 15 00 Opt 17 17 Ket 20 End ------------------------------------------------------------------ Capturing subpattern count = 1 No options Case state changes First char = 'a' Need char = 'b' (caseless) ab 0: ab 1: ab aB 0: aB 1: aB *** Failers No match AB No match / (?i)abc/xD ------------------------------------------------------------------ 0 9 Bra 0 3 NC abc 9 9 Ket 12 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: caseless extended First char = 'a' (caseless) Need char = 'c' (caseless) /#this is a comment (?i)abc/xD ------------------------------------------------------------------ 0 9 Bra 0 3 NC abc 9 9 Ket 12 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: caseless extended First char = 'a' (caseless) Need char = 'c' (caseless) /123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/D ------------------------------------------------------------------ 0 603 Bra 0 3 123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890 603 603 Ket 606 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options First char = '1' Need char = '0' /\Q123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/D ------------------------------------------------------------------ 0 603 Bra 0 3 123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890 603 603 Ket 606 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options First char = '1' Need char = '0' /\Q\E/D ------------------------------------------------------------------ 0 3 Bra 0 3 3 Ket 6 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options No first char No need char \ 0: /\Q\Ex/D ------------------------------------------------------------------ 0 5 Bra 0 3 x 5 5 Ket 8 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options First char = 'x' No need char / \Q\E/D ------------------------------------------------------------------ 0 5 Bra 0 3 5 5 Ket 8 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options First char = ' ' No need char /a\Q\E/D ------------------------------------------------------------------ 0 5 Bra 0 3 a 5 5 Ket 8 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options First char = 'a' No need char abc 0: a bca 0: a bac 0: a /a\Q\Eb/D ------------------------------------------------------------------ 0 7 Bra 0 3 ab 7 7 Ket 10 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options First char = 'a' Need char = 'b' abc 0: ab /\Q\Eabc/D ------------------------------------------------------------------ 0 9 Bra 0 3 abc 9 9 Ket 12 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options First char = 'a' Need char = 'c' /x*+\w/D ------------------------------------------------------------------ 0 12 Bra 0 3 5 Once 6 x* 8 5 Ket 11 \w 12 12 Ket 15 End ------------------------------------------------------------------ Capturing subpattern count = 0 Partial matching not supported No options No first char No need char *** Failers 0: F xxxxx No match /x?+/D ------------------------------------------------------------------ 0 11 Bra 0 3 5 Once 6 x? 8 5 Ket 11 11 Ket 14 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options No first char No need char /x++/D ------------------------------------------------------------------ 0 11 Bra 0 3 5 Once 6 x+ 8 5 Ket 11 11 Ket 14 End ------------------------------------------------------------------ Capturing subpattern count = 0 Partial matching not supported No options First char = 'x' No need char /x{1,3}+/D ------------------------------------------------------------------ 0 15 Bra 0 3 9 Once 6 x 8 x{,2} 12 9 Ket 15 15 Ket 18 End ------------------------------------------------------------------ Capturing subpattern count = 0 Partial matching not supported No options First char = 'x' No need char /(x)*+/D ------------------------------------------------------------------ 0 18 Bra 0 3 12 Once 6 Brazero 7 5 Bra 1 10 x 12 5 KetRmax 15 12 Ket 18 18 Ket 21 End ------------------------------------------------------------------ Capturing subpattern count = 1 No options No first char No need char /^(\w++|\s++)*$/ Capturing subpattern count = 1 Partial matching not supported Options: anchored No first char No need char now is the time for all good men to come to the aid of the party 0: now is the time for all good men to come to the aid of the party 1: party *** Failers No match this is not a line with only words and spaces! No match /(\d++)(\w)/ Capturing subpattern count = 2 Partial matching not supported No options No first char No need char 12345a 0: 12345a 1: 12345 2: a *** Failers No match 12345+ No match /a++b/ Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' Need char = 'b' aaab 0: aaab /(a++b)/ Capturing subpattern count = 1 Partial matching not supported No options First char = 'a' Need char = 'b' aaab 0: aaab 1: aaab /(a++)b/ Capturing subpattern count = 1 Partial matching not supported No options First char = 'a' Need char = 'b' aaab 0: aaab 1: aaa /([^()]++|\([^()]*\))+/ Capturing subpattern count = 1 Partial matching not supported No options No first char No need char ((abc(ade)ufh()()x 0: abc(ade)ufh()()x 1: x /\(([^()]++|\([^()]+\))+\)/ Capturing subpattern count = 1 Partial matching not supported No options First char = '(' Need char = ')' (abc) 0: (abc) 1: abc (abc(def)xyz) 0: (abc(def)xyz) 1: xyz *** Failers No match ((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa No match /(abc){1,3}+/D ------------------------------------------------------------------ 0 53 Bra 0 3 47 Once 6 9 Bra 1 9 abc 15 9 Ket 18 Brazero 19 28 Bra 0 22 9 Bra 1 25 abc 31 9 Ket 34 Brazero 35 9 Bra 1 38 abc 44 9 Ket 47 28 Ket 50 47 Ket 53 53 Ket 56 End ------------------------------------------------------------------ Capturing subpattern count = 1 No options First char = 'a' Need char = 'c' /a+?+/ Failed: nothing to repeat at offset 3 /a{2,3}?+b/ Failed: nothing to repeat at offset 7 /(?U)a+?+/ Failed: nothing to repeat at offset 7 /a{2,3}?+b/U Failed: nothing to repeat at offset 7 /x(?U)a++b/D ------------------------------------------------------------------ 0 15 Bra 0 3 x 5 5 Once 8 a+ 10 5 Ket 13 b 15 15 Ket 18 End ------------------------------------------------------------------ Capturing subpattern count = 0 Partial matching not supported No options First char = 'x' Need char = 'b' xaaaab 0: xaaaab /(?U)xa++b/D ------------------------------------------------------------------ 0 15 Bra 0 3 x 5 5 Once 8 a+ 10 5 Ket 13 b 15 15 Ket 18 End ------------------------------------------------------------------ Capturing subpattern count = 0 Partial matching not supported Options: ungreedy First char = 'x' Need char = 'b' xaaaab 0: xaaaab /^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/D ------------------------------------------------------------------ 0 106 Bra 0 3 ^ 4 99 Bra 1 7 5 Bra 2 10 a+ 12 5 Ket 15 37 Bra 3 18 [ab]+? 52 37 Ket 55 37 Bra 4 58 [bc]+ 92 37 Ket 95 5 Bra 5 98 \w* 100 5 Ket 103 99 Ket 106 106 Ket 109 End ------------------------------------------------------------------ Capturing subpattern count = 5 Partial matching not supported Options: anchored No first char No need char /^x(?U)a+b/D ------------------------------------------------------------------ 0 10 Bra 0 3 ^ 4 x 6 a+? 8 b 10 10 Ket 13 End ------------------------------------------------------------------ Capturing subpattern count = 0 Partial matching not supported Options: anchored No first char Need char = 'b' /^x(?U)(a+)b/D ------------------------------------------------------------------ 0 16 Bra 0 3 ^ 4 x 6 5 Bra 1 9 a+? 11 5 Ket 14 b 16 16 Ket 19 End ------------------------------------------------------------------ Capturing subpattern count = 1 Partial matching not supported Options: anchored No first char Need char = 'b' /[.x.]/ Failed: POSIX collating elements are not supported at offset 0 /[=x=]/ Failed: POSIX collating elements are not supported at offset 0 /[:x:]/ Failed: POSIX named classes are supported only within a class at offset 0 /\l/ Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1 /\L/ Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1 /\N{name}/ Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1 /\u/ Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1 /\U/ Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1 /[/ Failed: missing terminating ] for character class at offset 1 /[a-/ Failed: missing terminating ] for character class at offset 3 /[[:space:]/ Failed: missing terminating ] for character class at offset 10 /[\s]/DM Memory allocation (code space): 40 ------------------------------------------------------------------ 0 36 Bra 0 3 [\x09\x0a\x0c\x0d ] 36 36 Ket 39 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options No first char No need char /[[:space:]]/DM Memory allocation (code space): 40 ------------------------------------------------------------------ 0 36 Bra 0 3 [\x09-\x0d ] 36 36 Ket 39 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options No first char No need char /[[:space:]abcde]/DM Memory allocation (code space): 40 ------------------------------------------------------------------ 0 36 Bra 0 3 [\x09-\x0d a-e] 36 36 Ket 39 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options No first char No need char /< (?: (?(R) \d++ | [^<>]*+) | (?R)) * >/x Capturing subpattern count = 0 Partial matching not supported Options: extended First char = '<' Need char = '>' <> 0: <> 0: hij> 0: hij> hij> 0: def> 0: def> 0: <> *** Failers No match iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b|DM Memory allocation (code space): 826 ------------------------------------------------------------------ 0 822 Bra 0 3 8J$WE<.rX+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDDqmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:x9'c[%z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X 821 \b 822 822 Ket 825 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options First char = '8' Need char = 'X' |\$\<\.X\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b|DM Memory allocation (code space): 816 ------------------------------------------------------------------ 0 812 Bra 0 3 $<.X+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDDqmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:x9'c[%z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X 811 \b 812 812 Ket 815 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options First char = '$' Need char = 'X' /(.*)\d+\1/I Capturing subpattern count = 1 Max back reference = 1 Partial matching not supported No options No first char No need char /(.*)\d+/I Capturing subpattern count = 1 Partial matching not supported No options First char at start or follows \n No need char /(.*)\d+\1/Is Capturing subpattern count = 1 Max back reference = 1 Partial matching not supported Options: dotall No first char No need char /(.*)\d+/Is Capturing subpattern count = 1 Partial matching not supported Options: anchored dotall No first char No need char /(.*(xyz))\d+\2/I Capturing subpattern count = 2 Max back reference = 2 Partial matching not supported No options First char at start or follows \n Need char = 'z' /((.*))\d+\1/I Capturing subpattern count = 2 Max back reference = 1 Partial matching not supported No options No first char No need char abc123bc 0: bc123bc 1: bc 2: bc /a[b]/I Capturing subpattern count = 0 No options First char = 'a' Need char = 'b' /(?=a).*/I Capturing subpattern count = 0 Partial matching not supported No options First char = 'a' No need char /(?=abc).xyz/iI Capturing subpattern count = 0 Options: caseless First char = 'a' (caseless) Need char = 'z' (caseless) /(?=abc)(?i).xyz/I Capturing subpattern count = 0 No options Case state changes First char = 'a' Need char = 'z' (caseless) /(?=a)(?=b)/I Capturing subpattern count = 0 No options First char = 'a' No need char /(?=.)a/I Capturing subpattern count = 0 No options First char = 'a' No need char /((?=abcda)a)/I Capturing subpattern count = 1 No options First char = 'a' Need char = 'a' /((?=abcda)ab)/I Capturing subpattern count = 1 No options First char = 'a' Need char = 'b' /()a/I Capturing subpattern count = 1 No options No first char Need char = 'a' /(?(1)ab|ac)/I Capturing subpattern count = 0 No options First char = 'a' No need char /(?(1)abz|acz)/I Capturing subpattern count = 0 No options First char = 'a' Need char = 'z' /(?(1)abz)/I Capturing subpattern count = 0 No options No first char No need char /(?(1)abz)123/I Capturing subpattern count = 0 No options No first char Need char = '3' /(a)+/I Capturing subpattern count = 1 No options First char = 'a' No need char /(a){2,3}/I Capturing subpattern count = 1 No options First char = 'a' Need char = 'a' /(a)*/I Capturing subpattern count = 1 No options No first char No need char /[a]/I Capturing subpattern count = 0 No options First char = 'a' No need char /[ab]/I Capturing subpattern count = 0 No options No first char No need char /[ab]/IS Capturing subpattern count = 0 No options No first char No need char Starting byte set: a b /[^a]/I Capturing subpattern count = 0 No options No first char No need char /\d456/I Capturing subpattern count = 0 No options No first char Need char = '6' /\d456/IS Capturing subpattern count = 0 No options No first char Need char = '6' Starting byte set: 0 1 2 3 4 5 6 7 8 9 /a^b/I Capturing subpattern count = 0 No options First char = 'a' Need char = 'b' /^a/mI Capturing subpattern count = 0 Options: multiline First char at start or follows \n Need char = 'a' abcde 0: a xy\nabc 0: a *** Failers No match xyabc No match /c|abc/I Capturing subpattern count = 0 No options No first char Need char = 'c' /(?i)[ab]/IS Capturing subpattern count = 0 Options: caseless No first char No need char Starting byte set: A B a b /[ab](?i)cd/IS Capturing subpattern count = 0 No options Case state changes No first char Need char = 'd' (caseless) Starting byte set: a b /abc(?C)def/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'f' abcdef --->abcdef 0 ^ ^ d 0: abcdef 1234abcdef --->1234abcdef 0 ^ ^ d 0: abcdef *** Failers No match abcxyz No match abcxyzf --->abcxyzf 0 ^ ^ d No match /abc(?C)de(?C1)f/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'f' 123abcdef --->123abcdef 0 ^ ^ d 1 ^ ^ f 0: abcdef /(?C1)\dabc(?C2)def/ Capturing subpattern count = 0 No options No first char Need char = 'f' 1234abcdef --->1234abcdef 1 ^ \d 1 ^ \d 1 ^ \d 1 ^ \d 2 ^ ^ d 0: 4abcdef *** Failers No match abcdef --->abcdef 1 ^ \d 1 ^ \d 1 ^ \d 1 ^ \d 1 ^ \d 1 ^ \d No match /(?C255)ab/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'b' /(?C256)ab/ Failed: number after (?C is > 255 at offset 6 /(?Cab)xx/ Failed: closing ) for (?C expected at offset 3 /(?C12vr)x/ Failed: closing ) for (?C expected at offset 5 /abc(?C)def/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'f' *** Failers No match \x83\x0\x61bcdef --->\x83\x00abcdef 0 ^ ^ d 0: abcdef /(abc)(?C)de(?C1)f/ Capturing subpattern count = 1 No options First char = 'a' Need char = 'f' 123abcdef --->123abcdef 0 ^ ^ d 1 ^ ^ f 0: abcdef 1: abc 123abcdef\C+ Callout 0: last capture = 1 0: 1: abc --->123abcdef ^ ^ d Callout 1: last capture = 1 0: 1: abc --->123abcdef ^ ^ f 0: abcdef 1: abc 123abcdef\C- 0: abcdef 1: abc *** Failers No match 123abcdef\C!1 --->123abcdef 0 ^ ^ d 1 ^ ^ f No match /(?C0)(abc(?C1))*/ Capturing subpattern count = 1 No options No first char No need char abcabcabc --->abcabcabc 0 ^ (abc(?C1))* 1 ^ ^ ) 1 ^ ^ ) 1 ^ ^ ) 0: abcabcabc 1: abc abcabc\C!1!3 --->abcabc 0 ^ (abc(?C1))* 1 ^ ^ ) 1 ^ ^ ) 0: abcabc 1: abc *** Failers --->*** Failers 0 ^ (abc(?C1))* 0: abcabcabc\C!1!3 --->abcabcabc 0 ^ (abc(?C1))* 1 ^ ^ ) 1 ^ ^ ) 1 ^ ^ ) 0: abcabc 1: abc /(\d{3}(?C))*/ Capturing subpattern count = 1 Partial matching not supported No options No first char No need char 123\C+ Callout 0: last capture = -1 0: --->123 ^ ^ ) 0: 123 1: 123 123456\C+ Callout 0: last capture = -1 0: --->123456 ^ ^ ) Callout 0: last capture = 1 0: 1: 123 --->123456 ^ ^ ) 0: 123456 1: 456 123456789\C+ Callout 0: last capture = -1 0: --->123456789 ^ ^ ) Callout 0: last capture = 1 0: 1: 123 --->123456789 ^ ^ ) Callout 0: last capture = 1 0: 1: 456 --->123456789 ^ ^ ) 0: 123456789 1: 789 /((xyz)(?C)p|(?C1)xyzabc)/ Capturing subpattern count = 2 No options First char = 'x' No need char xyzabc\C+ Callout 0: last capture = 2 0: 1: 2: xyz --->xyzabc ^ ^ p Callout 1: last capture = -1 0: --->xyzabc ^ x 0: xyzabc 1: xyzabc /(X)((xyz)(?C)p|(?C1)xyzabc)/ Capturing subpattern count = 3 No options First char = 'X' Need char = 'x' Xxyzabc\C+ Callout 0: last capture = 3 0: 1: X 2: 3: xyz --->Xxyzabc ^ ^ p Callout 1: last capture = 1 0: 1: X --->Xxyzabc ^^ x 0: Xxyzabc 1: X 2: xyzabc /(?=(abc))(?C)abcdef/ Capturing subpattern count = 1 No options First char = 'a' Need char = 'f' abcdef\C+ Callout 0: last capture = 1 0: 1: abc --->abcdef ^ a 0: abcdef 1: abc /(?!(abc)(?C1)d)(?C2)abcxyz/ Capturing subpattern count = 1 No options First char = 'a' Need char = 'z' abcxyz\C+ Callout 1: last capture = 1 0: 1: abc --->abcxyz ^ ^ d Callout 2: last capture = -1 0: --->abcxyz ^ a 0: abcxyz /(?<=(abc)(?C))xyz/ Capturing subpattern count = 1 No options First char = 'x' Need char = 'z' abcxyz\C+ Callout 0: last capture = 1 0: 1: abc --->abcxyz ^ ) 0: xyz 1: abc /(?C)abc/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'c' /(?C)^abc/ Capturing subpattern count = 0 Options: anchored No first char No need char /(?C)a|b/S Capturing subpattern count = 0 No options No first char No need char Starting byte set: a b /(?R)/ Failed: recursive call could loop indefinitely at offset 3 /(a|(?R))/ Failed: recursive call could loop indefinitely at offset 6 /(ab|(bc|(de|(?R))))/ Failed: recursive call could loop indefinitely at offset 15 /x(ab|(bc|(de|(?R))))/ Capturing subpattern count = 3 No options First char = 'x' No need char xab 0: xab 1: ab xbc 0: xbc 1: bc 2: bc xde 0: xde 1: de 2: de 3: de xxab 0: xxab 1: xab 2: xab 3: xab xxxab 0: xxxab 1: xxab 2: xxab 3: xxab *** Failers No match xyab No match /(ab|(bc|(de|(?1))))/ Failed: recursive call could loop indefinitely at offset 15 /x(ab|(bc|(de|(?1)x)x)x)/ Failed: recursive call could loop indefinitely at offset 16 /^([^()]|\((?1)*\))*$/ Capturing subpattern count = 1 Options: anchored No first char No need char abc 0: abc 1: c a(b)c 0: a(b)c 1: c a(b(c))d 0: a(b(c))d 1: d *** Failers) No match a(b(c)d No match /^>abc>([^()]|\((?1)*\))*abc>123abc>123abc>1(2)3abc>1(2)3abc>(1(2)3)abc>(1(2)3) 2: 3: Satan, oscillate my metallic sonatas 4: S A man, a plan, a canal: Panama! 0: A man, a plan, a canal: Panama! 1: 2: 3: A man, a plan, a canal: Panama 4: A Able was I ere I saw Elba. 0: Able was I ere I saw Elba. 1: 2: 3: Able was I ere I saw Elba 4: A *** Failers No match The quick brown fox No match /^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/ Capturing subpattern count = 2 Partial matching not supported Options: anchored No first char No need char 12 0: 12 1: 12 (((2+2)*-3)-7) 0: (((2+2)*-3)-7) 1: (((2+2)*-3)-7) 2: - -12 0: -12 1: -12 *** Failers No match ((2+2)*-3)-7) No match /^(x(y|(?1){2})z)/ Capturing subpattern count = 2 Options: anchored No first char No need char xyz 0: xyz 1: xyz 2: y xxyzxyzz 0: xxyzxyzz 1: xxyzxyzz 2: xyzxyz *** Failers No match xxyzz No match xxyzxyzxyzz No match /((< (?: (?(R) \d++ | [^<>]*+) | (?2)) * >))/x Capturing subpattern count = 2 Partial matching not supported Options: extended First char = '<' Need char = '>' <> 0: <> 1: <> 2: <> 0: 1: 2: hij> 0: hij> 1: hij> 2: hij> hij> 0: 1: 2: def> 0: def> 1: def> 2: def> 0: <> 1: <> 2: <> *** Failers No match b|c)d(?Pe)/D ------------------------------------------------------------------ 0 28 Bra 0 3 a 5 5 Bra 1 8 b 10 5 Alt 13 c 15 10 Ket 18 d 20 5 Bra 2 23 e 25 5 Ket 28 28 Ket 31 End ------------------------------------------------------------------ Capturing subpattern count = 2 Named capturing subpatterns: longername2 2 name1 1 No options First char = 'a' Need char = 'e' abde 0: abde 1: b 2: e acde 0: acde 1: c 2: e /(?:a(?Pc(?Pd)))(?Pa)/D ------------------------------------------------------------------ 0 35 Bra 0 3 21 Bra 0 6 a 8 13 Bra 1 11 c 13 5 Bra 2 16 d 18 5 Ket 21 13 Ket 24 21 Ket 27 5 Bra 3 30 a 32 5 Ket 35 35 Ket 38 End ------------------------------------------------------------------ Capturing subpattern count = 3 Named capturing subpatterns: a 3 c 1 d 2 No options First char = 'a' Need char = 'a' /(?Pa)...(?P=a)bbb(?P>a)d/D ------------------------------------------------------------------ 0 28 Bra 0 3 5 Bra 1 6 a 8 5 Ket 11 Any 12 Any 13 Any 14 \1 17 bbb 23 3 Recurse 26 d 28 28 Ket 31 End ------------------------------------------------------------------ Capturing subpattern count = 1 Max back reference = 1 Named capturing subpatterns: a 1 No options First char = 'a' Need char = 'd' /^\W*(?:(?P(?P.)\W*(?P>one)\W*(?P=two)|)|(?P(?P.)\W*(?P>three)\W*(?P=four)|\W*.\W*))\W*$/i Capturing subpattern count = 4 Max back reference = 4 Named capturing subpatterns: four 4 one 1 three 3 two 2 Partial matching not supported Options: anchored caseless No first char No need char 1221 0: 1221 1: 1221 2: 1 Satan, oscillate my metallic sonatas! 0: Satan, oscillate my metallic sonatas! 1: 2: 3: Satan, oscillate my metallic sonatas 4: S A man, a plan, a canal: Panama! 0: A man, a plan, a canal: Panama! 1: 2: 3: A man, a plan, a canal: Panama 4: A Able was I ere I saw Elba. 0: Able was I ere I saw Elba. 1: 2: 3: Able was I ere I saw Elba 4: A *** Failers No match The quick brown fox No match /((?(R)a|b))\1(?1)?/ Capturing subpattern count = 1 Max back reference = 1 No options No first char No need char bb 0: bb 1: b bbaa 0: bba 1: b /(.*)a/sI Capturing subpattern count = 1 Partial matching not supported Options: anchored dotall No first char Need char = 'a' /(.*)a\1/sI Capturing subpattern count = 1 Max back reference = 1 Partial matching not supported Options: dotall No first char Need char = 'a' /(.*)a(b)\2/sI Capturing subpattern count = 2 Max back reference = 2 Partial matching not supported Options: anchored dotall No first char Need char = 'b' /((.*)a|(.*)b)z/sI Capturing subpattern count = 3 Partial matching not supported Options: anchored dotall No first char Need char = 'z' /((.*)a|(.*)b)z\1/sI Capturing subpattern count = 3 Max back reference = 1 Partial matching not supported Options: dotall No first char Need char = 'z' /((.*)a|(.*)b)z\2/sI Capturing subpattern count = 3 Max back reference = 2 Partial matching not supported Options: dotall No first char Need char = 'z' /((.*)a|(.*)b)z\3/sI Capturing subpattern count = 3 Max back reference = 3 Partial matching not supported Options: dotall No first char Need char = 'z' /((.*)a|^(.*)b)z\3/sI Capturing subpattern count = 3 Max back reference = 3 Partial matching not supported Options: anchored dotall No first char Need char = 'z' /(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a/sI Capturing subpattern count = 31 Partial matching not supported Options: anchored dotall No first char No need char /(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\31/sI Capturing subpattern count = 31 Max back reference = 31 Partial matching not supported Options: dotall No first char No need char /(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\32/sI Capturing subpattern count = 32 Max back reference = 32 Partial matching not supported Options: dotall No first char No need char /(a)(bc)/ND ------------------------------------------------------------------ 0 21 Bra 0 3 5 Bra 0 6 a 8 5 Ket 11 7 Bra 0 14 bc 18 7 Ket 21 21 Ket 24 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: First char = 'a' Need char = 'c' abc 0: abc /(?Pa)(bc)/ND ------------------------------------------------------------------ 0 21 Bra 0 3 5 Bra 1 6 a 8 5 Ket 11 7 Bra 0 14 bc 18 7 Ket 21 21 Ket 24 End ------------------------------------------------------------------ Capturing subpattern count = 1 Named capturing subpatterns: one 1 Options: First char = 'a' Need char = 'c' abc 0: abc 1: a /(a)(?Pbc)/ND ------------------------------------------------------------------ 0 21 Bra 0 3 5 Bra 0 6 a 8 5 Ket 11 7 Bra 1 14 bc 18 7 Ket 21 21 Ket 24 End ------------------------------------------------------------------ Capturing subpattern count = 1 Named capturing subpatterns: named 1 Options: First char = 'a' Need char = 'c' /(a+)*zz/ Capturing subpattern count = 1 Partial matching not supported No options No first char Need char = 'z' aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaazzbbbbbb\M Minimum match limit = 8 0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaazz 1: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaz\M Minimum match limit = 32768 No match /(aaa(?C1)bbb|ab)/ Capturing subpattern count = 1 No options First char = 'a' Need char = 'b' aaabbb --->aaabbb 1 ^ ^ b 0: aaabbb 1: aaabbb aaabbb\C*0 --->aaabbb 1 ^ ^ b 0: aaabbb 1: aaabbb aaabbb\C*1 --->aaabbb 1 ^ ^ b Callout data = 1 0: ab 1: ab aaabbb\C*-1 --->aaabbb 1 ^ ^ b Callout data = -1 No match /ab(?Pcd)ef(?Pgh)/ Capturing subpattern count = 2 Named capturing subpatterns: one 1 two 2 No options First char = 'a' Need char = 'h' abcdefgh 0: abcdefgh 1: cd 2: gh abcdefgh\C1\Gtwo 0: abcdefgh 1: cd 2: gh 1C cd (2) 2G gh (2) abcdefgh\Cone\Ctwo 0: abcdefgh 1: cd 2: gh 1C cd (2) 2C gh (2) abcdefgh\Cthree no parentheses with name "three" 0: abcdefgh 1: cd 2: gh /(?P)(?P)/D ------------------------------------------------------------------ 0 15 Bra 0 3 3 Bra 1 6 3 Ket 9 3 Bra 2 12 3 Ket 15 15 Ket 18 End ------------------------------------------------------------------ Capturing subpattern count = 2 Named capturing subpatterns: Tes 1 Test 2 No options No first char No need char /(?P)(?P)/D ------------------------------------------------------------------ 0 15 Bra 0 3 3 Bra 1 6 3 Ket 9 3 Bra 2 12 3 Ket 15 15 Ket 18 End ------------------------------------------------------------------ Capturing subpattern count = 2 Named capturing subpatterns: Tes 2 Test 1 No options No first char No need char /(?Pzz)(?Paa)/ Capturing subpattern count = 2 Named capturing subpatterns: A 2 Z 1 No options First char = 'z' Need char = 'a' zzaa\CZ 0: zzaa 1: zz 2: aa 1C zz (2) zzaa\CA 0: zzaa 1: zz 2: aa 2C aa (2) /(?Peks)(?Peccs)/ Failed: two named groups have the same name at offset 16 /(?Pabc(?Pdef)(?Pxyz))/ Failed: two named groups have the same name at offset 31 "\[((?P\d+)(,(?P>elem))*)\]" Capturing subpattern count = 3 Named capturing subpatterns: elem 2 Partial matching not supported No options First char = '[' Need char = ']' [10,20,30,5,5,4,4,2,43,23,4234] 0: [10,20,30,5,5,4,4,2,43,23,4234] 1: 10,20,30,5,5,4,4,2,43,23,4234 2: 10 3: ,4234 *** Failers No match [] No match "\[((?P\d+)(,(?P>elem))*)?\]" Capturing subpattern count = 3 Named capturing subpatterns: elem 2 Partial matching not supported No options First char = '[' Need char = ']' [10,20,30,5,5,4,4,2,43,23,4234] 0: [10,20,30,5,5,4,4,2,43,23,4234] 1: 10,20,30,5,5,4,4,2,43,23,4234 2: 10 3: ,4234 [] 0: [] /(a(b(?2)c))?/D ------------------------------------------------------------------ 0 25 Bra 0 3 Brazero 4 18 Bra 1 7 a 9 10 Bra 2 12 b 14 9 Recurse 17 c 19 10 Ket 22 18 Ket 25 25 Ket 28 End ------------------------------------------------------------------ Capturing subpattern count = 2 No options No first char No need char /(a(b(?2)c))*/D ------------------------------------------------------------------ 0 25 Bra 0 3 Brazero 4 18 Bra 1 7 a 9 10 Bra 2 12 b 14 9 Recurse 17 c 19 10 Ket 22 18 KetRmax 25 25 Ket 28 End ------------------------------------------------------------------ Capturing subpattern count = 2 No options No first char No need char /(a(b(?2)c)){0,2}/D ------------------------------------------------------------------ 0 53 Bra 0 3 Brazero 4 46 Bra 0 7 18 Bra 1 10 a 12 10 Bra 2 15 b 17 12 Recurse 20 c 22 10 Ket 25 18 Ket 28 Brazero 29 18 Bra 1 32 a 34 10 Bra 2 37 b 39 12 Recurse 42 c 44 10 Ket 47 18 Ket 50 46 Ket 53 53 Ket 56 End ------------------------------------------------------------------ Capturing subpattern count = 2 No options No first char No need char /[ab]{1}+/D ------------------------------------------------------------------ 0 47 Bra 0 3 41 Once 6 [ab]{1,1} 44 41 Ket 47 47 Ket 50 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options No first char No need char /((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/i Capturing subpattern count = 3 Partial matching not supported Options: caseless No first char Need char = 'g' (caseless) Baby Bjorn Active Carrier - With free SHIPPING!! 0: Baby Bjorn Active Carrier - With free SHIPPING!! 1: Baby Bjorn Active Carrier - With free SHIPPING!! /((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/iS Capturing subpattern count = 3 Partial matching not supported Options: caseless No first char Need char = 'g' (caseless) Study returned NULL Baby Bjorn Active Carrier - With free SHIPPING!! 0: Baby Bjorn Active Carrier - With free SHIPPING!! 1: Baby Bjorn Active Carrier - With free SHIPPING!! /a*.*b/SD ------------------------------------------------------------------ 0 9 Bra 0 3 a* 5 Any* 7 b 9 9 Ket 12 End ------------------------------------------------------------------ Capturing subpattern count = 0 Partial matching not supported No options No first char Need char = 'b' Study returned NULL /(a|b)*.?c/SD ------------------------------------------------------------------ 0 21 Bra 0 3 Brazero 4 5 Bra 1 7 a 9 5 Alt 12 b 14 10 KetRmax 17 Any? 19 c 21 21 Ket 24 End ------------------------------------------------------------------ Capturing subpattern count = 1 No options No first char Need char = 'c' Study returned NULL /abc(?C255)de(?C)f/D ------------------------------------------------------------------ 0 27 Bra 0 3 abc 9 Callout 255 10 1 15 de 19 Callout 0 16 1 25 f 27 27 Ket 30 End ------------------------------------------------------------------ Capturing subpattern count = 0 No options First char = 'a' Need char = 'f' /abcde/CD ------------------------------------------------------------------ 0 49 Bra 0 3 Callout 255 0 1 9 a 11 Callout 255 1 1 17 b 19 Callout 255 2 1 25 c 27 Callout 255 3 1 33 d 35 Callout 255 4 1 41 e 43 Callout 255 5 0 49 49 Ket 52 End ------------------------------------------------------------------ Capturing subpattern count = 0 Options: First char = 'a' Need char = 'e' abcde --->abcde +0 ^ a +1 ^^ b +2 ^ ^ c +3 ^ ^ d +4 ^ ^ e +5 ^ ^ 0: abcde abcdfe --->abcdfe +0 ^ a +1 ^^ b +2 ^ ^ c +3 ^ ^ d +4 ^ ^ e No match /a*b/CD ------------------------------------------------------------------ 0 25 Bra 0 3 Callout 255 0 2 9 a* 11 Callout 255 2 1 17 b 19 Callout 255 3 0 25 25 Ket 28 End ------------------------------------------------------------------ Capturing subpattern count = 0 Partial matching not supported Options: No first char Need char = 'b' ab --->ab +0 ^ a* +2 ^^ b +3 ^ ^ 0: ab aaaab --->aaaab +0 ^ a* +2 ^ ^ b +3 ^ ^ 0: aaaab aaaacb --->aaaacb +0 ^ a* +2 ^ ^ b +2 ^ ^ b +2 ^ ^ b +2 ^^ b +2 ^ b +0 ^ a* +2 ^ ^ b +2 ^ ^ b +2 ^^ b +2 ^ b +0 ^ a* +2 ^ ^ b +2 ^^ b +2 ^ b +0 ^ a* +2 ^^ b +2 ^ b +0 ^ a* +2 ^ b +0 ^ a* +2 ^ b +3 ^^ 0: b /a+b/CD ------------------------------------------------------------------ 0 25 Bra 0 3 Callout 255 0 2 9 a+ 11 Callout 255 2 1 17 b 19 Callout 255 3 0 25 25 Ket 28 End ------------------------------------------------------------------ Capturing subpattern count = 0 Partial matching not supported Options: First char = 'a' Need char = 'b' ab --->ab +0 ^ a+ +2 ^^ b +3 ^ ^ 0: ab aaaab --->aaaab +0 ^ a+ +2 ^ ^ b +3 ^ ^ 0: aaaab aaaacb --->aaaacb +0 ^ a+ +2 ^ ^ b +2 ^ ^ b +2 ^ ^ b +2 ^^ b +0 ^ a+ +2 ^ ^ b +2 ^ ^ b +2 ^^ b +0 ^ a+ +2 ^ ^ b +2 ^^ b +0 ^ a+ +2 ^^ b No match /(abc|def)x/CD ------------------------------------------------------------------ 0 92 Bra 0 3 Callout 255 0 9 9 33 Bra 1 12 Callout 255 1 1 18 a 20 Callout 255 2 1 26 b 28 Callout 255 3 1 34 c 36 Callout 255 4 0 42 33 Alt 45 Callout 255 5 1 51 d 53 Callout 255 6 1 59 e 61 Callout 255 7 1 67 f 69 Callout 255 8 0 75 66 Ket 78 Callout 255 9 1 84 x 86 Callout 255 10 0 92 92 Ket 95 End ------------------------------------------------------------------ Capturing subpattern count = 1 Options: No first char Need char = 'x' abcx --->abcx +0 ^ (abc|def) +1 ^ a +2 ^^ b +3 ^ ^ c +4 ^ ^ | +9 ^ ^ x +10 ^ ^ 0: abcx 1: abc defx --->defx +0 ^ (abc|def) +1 ^ a +5 ^ d +6 ^^ e +7 ^ ^ f +8 ^ ^ ) +9 ^ ^ x +10 ^ ^ 0: defx 1: def abcdefzx --->abcdefzx +0 ^ (abc|def) +1 ^ a +2 ^^ b +3 ^ ^ c +4 ^ ^ | +9 ^ ^ x +5 ^ d +0 ^ (abc|def) +1 ^ a +5 ^ d +0 ^ (abc|def) +1 ^ a +5 ^ d +0 ^ (abc|def) +1 ^ a +5 ^ d +6 ^^ e +7 ^ ^ f +8 ^ ^ ) +9 ^ ^ x +0 ^ (abc|def) +1 ^ a +5 ^ d +0 ^ (abc|def) +1 ^ a +5 ^ d +0 ^ (abc|def) +1 ^ a +5 ^ d +0 ^ (abc|def) +1 ^ a +5 ^ d No match /(ab|cd){3,4}/C Capturing subpattern count = 1 Options: No first char No need char ababab --->ababab +0 ^ (ab|cd){3,4} +1 ^ a +2 ^^ b +3 ^ ^ | +1 ^ ^ a +2 ^ ^ b +3 ^ ^ | +1 ^ ^ a +2 ^ ^ b +3 ^ ^ | +1 ^ ^ a +4 ^ ^ c +12 ^ ^ 0: ababab 1: ab abcdabcd --->abcdabcd +0 ^ (ab|cd){3,4} +1 ^ a +2 ^^ b +3 ^ ^ | +1 ^ ^ a +4 ^ ^ c +5 ^ ^ d +6 ^ ^ ) +1 ^ ^ a +2 ^ ^ b +3 ^ ^ | +1 ^ ^ a +4 ^ ^ c +5 ^ ^ d +6 ^ ^ ) +12 ^ ^ 0: abcdabcd 1: cd abcdcdcdcdcd --->abcdcdcdcdcd +0 ^ (ab|cd){3,4} +1 ^ a +2 ^^ b +3 ^ ^ | +1 ^ ^ a +4 ^ ^ c +5 ^ ^ d +6 ^ ^ ) +1 ^ ^ a +4 ^ ^ c +5 ^ ^ d +6 ^ ^ ) +1 ^ ^ a +4 ^ ^ c +5 ^ ^ d +6 ^ ^ ) +12 ^ ^ 0: abcdcdcd 1: cd /([ab]{,4}c|xy)/CD ------------------------------------------------------------------ 0 131 Bra 0 3 Callout 255 0 14 9 88 Bra 1 12 Callout 255 1 4 18 [ab] 51 Callout 255 5 1 57 { 59 Callout 255 6 1 65 , 67 Callout 255 7 1 73 4 75 Callout 255 8 1 81 } 83 Callout 255 9 1 89 c 91 Callout 255 10 0 97 25 Alt 100 Callout 255 11 1 106 x 108 Callout 255 12 1 114 y 116 Callout 255 13 0 122 113 Ket 125 Callout 255 14 0 131 131 Ket 134 End ------------------------------------------------------------------ Capturing subpattern count = 1 Options: No first char No need char Note: that { does NOT introduce a quantifier --->Note: that { does NOT introduce a quantifier +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +5 ^^ { +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +5 ^^ { +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +5 ^^ { +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x +0 ^ ([ab]{,4}c|xy) +1 ^ [ab] +11 ^ x No match /([ab]{1,4}c|xy){4,5}?123/CD ------------------------------------------------------------------ 0 485 Bra 0 3 Callout 255 0 21 9 61 Bra 1 12 Callout 255 1 9 18 [ab]{1,4} 56 Callout 255 10 1 62 c 64 Callout 255 11 0 70 25 Alt 73 Callout 255 12 1 79 x 81 Callout 255 13 1 87 y 89 Callout 255 14 0 95 86 Ket 98 61 Bra 1 101 Callout 255 1 9 107 [ab]{1,4} 145 Callout 255 10 1 151 c 153 Callout 255 11 0 159 25 Alt 162 Callout 255 12 1 168 x 170 Callout 255 13 1 176 y 178 Callout 255 14 0 184 86 Ket 187 61 Bra 1 190 Callout 255 1 9 196 [ab]{1,4} 234 Callout 255 10 1 240 c 242 Callout 255 11 0 248 25 Alt 251 Callout 255 12 1 257 x 259 Callout 255 13 1 265 y 267 Callout 255 14 0 273 86 Ket 276 61 Bra 1 279 Callout 255 1 9 285 [ab]{1,4} 323 Callout 255 10 1 329 c 331 Callout 255 11 0 337 25 Alt 340 Callout 255 12 1 346 x 348 Callout 255 13 1 354 y 356 Callout 255 14 0 362 86 Ket 365 Braminzero 366 61 Bra 1 369 Callout 255 1 9 375 [ab]{1,4} 413 Callout 255 10 1 419 c 421 Callout 255 11 0 427 25 Alt 430 Callout 255 12 1 436 x 438 Callout 255 13 1 444 y 446 Callout 255 14 0 452 86 Ket 455 Callout 255 21 1 461 1 463 Callout 255 22 1 469 2 471 Callout 255 23 1 477 3 479 Callout 255 24 0 485 485 Ket 488 End ------------------------------------------------------------------ Capturing subpattern count = 1 Partial matching not supported Options: No first char Need char = '3' aacaacaacaacaac123 --->aacaacaacaacaac123 +0 ^ ([ab]{1,4}c|xy){4,5}? +1 ^ [ab]{1,4} +10 ^ ^ c +11 ^ ^ | +1 ^ ^ [ab]{1,4} +10 ^ ^ c +11 ^ ^ | +1 ^ ^ [ab]{1,4} +10 ^ ^ c +11 ^ ^ | +1 ^ ^ [ab]{1,4} +10 ^ ^ c +11 ^ ^ | +21 ^ ^ 1 +1 ^ ^ [ab]{1,4} +10 ^ ^ c +11 ^ ^ | +21 ^ ^ 1 +22 ^ ^ 2 +23 ^ ^ 3 +24 ^ ^ 0: aacaacaacaacaac123 1: aac /\b.*/I Capturing subpattern count = 0 Partial matching not supported No options No first char No need char ab cd\>1 0: cd /\b.*/Is Capturing subpattern count = 0 Partial matching not supported Options: dotall No first char No need char ab cd\>1 0: cd /(?!.bcd).*/I Capturing subpattern count = 0 Partial matching not supported No options No first char No need char Xbcd12345 0: bcd12345 /abcde/ Capturing subpattern count = 0 No options First char = 'a' Need char = 'e' ab\P Partial match abc\P Partial match abcd\P Partial match abcde\P 0: abcde the quick brown abc\P Partial match ** Failers\P No match the quick brown abxyz fox\P No match "^(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[012])/(20)?\d\d$" Capturing subpattern count = 3 Options: anchored No first char Need char = '/' 13/05/04\P 0: 13/05/04 1: 13 2: 05 13/5/2004\P 0: 13/5/2004 1: 13 2: 5 3: 20 02/05/09\P 0: 02/05/09 1: 02 2: 05 1\P Partial match 1/2\P Partial match 1/2/0\P Partial match 1/2/04\P 0: 1/2/04 1: 1 2: 2 0\P Partial match 02/\P Partial match 02/0\P Partial match 02/1\P Partial match ** Failers\P No match \P No match 123\P No match 33/4/04\P No match 3/13/04\P No match 0/1/2003\P No match 0/\P No match 02/0/\P No match 02/13\P No match /0{0,2}ABC/I Capturing subpattern count = 0 Partial matching not supported No options No first char Need char = 'C' /\d{3,}ABC/I Capturing subpattern count = 0 Partial matching not supported No options No first char Need char = 'C' /\d*ABC/I Capturing subpattern count = 0 Partial matching not supported No options No first char Need char = 'C' /[abc]+DE/I Capturing subpattern count = 0 Partial matching not supported No options No first char Need char = 'E' /[abc]?123/ Capturing subpattern count = 0 No options No first char Need char = '3' 123\P 0: 123 a\P Partial match b\P Partial match c\P Partial match c12\P Partial match c123\P 0: c123 /^(?:\d){3,5}X/ Capturing subpattern count = 0 Options: anchored No first char Need char = 'X' 1\P Partial match 123\P Partial match 123X 0: 123X 1234\P Partial match 1234X 0: 1234X 12345\P Partial match 12345X 0: 12345X *** Failers No match 1X No match 123456\P No match /abc/>testsavedregex Capturing subpattern count = 0 No options First char = 'a' Need char = 'c' Compiled regex written to testsavedregex testsavedregex Capturing subpattern count = 0 No options First char = 'a' Need char = 'c' Compiled regex written to testsavedregex testsavedregex Capturing subpattern count = 1 No options No first char No need char Starting byte set: a b Compiled regex written to testsavedregex Study data written to testsavedregex testsavedregex Capturing subpattern count = 1 No options No first char No need char Starting byte set: a b Compiled regex written to testsavedregex Study data written to testsavedregex (.)*~smg Capturing subpattern count = 3 Max back reference = 1 Partial matching not supported Options: multiline dotall First char = '<' Need char = '>' \n\n\nPartner der LCO\nde\nPartner der LINEAS Consulting\nGmbH\nLINEAS Consulting GmbH Hamburg\nPartnerfirmen\n30 days\nindex,follow\n\nja\n3\nPartner\n\n\nLCO\nLINEAS Consulting\n15.10.2003\n\n\n\n\nDie Partnerfirmen der LINEAS Consulting\nGmbH\n\n\n \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n 0: \x0a\x0aPartner der LCO\x0ade\x0aPartner der LINEAS Consulting\x0aGmbH\x0aLINEAS Consulting GmbH Hamburg\x0aPartnerfirmen\x0a30 days\x0aindex,follow\x0a\x0aja\x0a3\x0aPartner\x0a\x0a\x0aLCO\x0aLINEAS Consulting\x0a15.10.2003\x0a\x0a\x0a\x0a\x0aDie Partnerfirmen der LINEAS Consulting\x0aGmbH\x0a\x0a\x0a \x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a\x0a 1: seite 2: \x0a 3: seite /^a/IF Capturing subpattern count = 0 Options: anchored No first char No need char / End of testinput2 / Capturing subpattern count = 0 No options First char = ' ' Need char = ' '