Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
mg

Test String

Code Generator

Language

Generated Code

$re = '/\'((?:([^\']*?)\\\\\'[^\']*?)*?)\'|(?:\\\\\')[^\']*\'([^\']*)\'|\'([^\']*?)\'/m'; $str = '\'test\' more\'test\' \'test\'more \\\'no\'yes\' a \'one\' and \'two\' and \'three\'... nothing at all \'\' \'\'test test\'\' te\'\'st \'This is not wrong\' and \'this isn\\\'t either\' \'tw\\\'o repl\\\'acements\' in \'t\\\'wo stri\\\'ngs\'. \'\\\\\'\' \'\'\' \'test1\'\\n\'test2\' \'\'\'\' [^\\\\]\'([^\']*)\'| {;nF, yy]fKAf<6H]T74R}1k#HUIc|]Rqz-Ce72-D%vz&Nm rw=81:1_Y&e,34pL.amQmAoj*m;6ObGN]#u71j%+H\\\'}4}b~|nTy]<B7umVMx;tN%QUPY=P`67F4Rert4Cy\'PMOJwnmc2s\\\'4f<EEmh,yj3Uf/u[lbc/dAgl*Xd%oY,T;+\\"2_f{BzP`.#v(yGtX\\\'O+4eU[P.3&1s+ xm! PMOJwnmc2s'; preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0); // Print the entire match result var_dump($matches);

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php