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
Processing...

Test String

Substitution
Processing...

Code Generator

Language

Generated Code

$re = '/(?<=[^a-zA-Z0-9_-]|^)([A-Za-z]{2,10}-\d{1,6})(?=[^a-zA-Z0-9_-]|$)/m'; $str = 'Merge pull request #2 in PAY/email-api from APP-8755-error to master APP-8755 - fixup error handling [RN] APP-8827 - Hooks up to email service Merge pull request #157 in EUE-API/eue-api-dwp-service from EE-31627 to master [EE-32070] Same logging work for TraceAllocate Merge branch \'tag/candidate-develop-umbrella-2.17.2-20200429160812\' into release Merge pull request #177 in EUE-CW1/ipt-sp-appmsg-hops-listener from ORCH-642 to develop ORCH-642 extended unit tests ORCH-643 hello [NG] testing FBISC-4612 does it correctly regex FBISC-542. [NG] testing FBISC-4612 does it correctly regex FBISC-542655 Revert APP-7491: Feign Retry with exception Mapping Revert APP-7449 "[NG] testing FBISC-4612 does it correctly regex FBISC-542."'; $subst = "$1"; $result = preg_replace($re, $subst, $str); echo "The result of the substitution is ".$result;

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