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

/
/
gm

Test String

Code Generator

Language

Generated Code

$re = '/^:(\w+):\s+((?:\s*(?!:)[^\s]+)+)/m'; $str = ':6585d0f0ba88767ac3b590f719596d864d73e9c1: harmonicbalance/src/harmonicbalance/HarmonicBalanceFlowModel.cpp harmonicbalance/src/harmonicbalance/HbFlutterModel.cpp :8302994b565553c83a048b8905ae597349d99627: emp/src/emp/PhasePairSingleParticleReynoldsNumber.h emp/src/emp/TomiyamaDragCoefficientMethod.cpp :9da194f17ec08bb20ad1be8df68b78ca137ab18a: combustion/src/combustion/ReactingSpeciesTransportBasedModel.cpp combustion/src/complexchemistry/TurbulentFlameClosure.cpp :6a59f0be1e347a65e525e58742bb304639ea9bc4: meshing/src/meshing/SurfaceMeshManipulation.cpp physics/src/discretization/FvIndirectRegionInterfaceManager.cpp physics/src/discretization/FvIndirectRegionInterfaceManager.h physics/src/discretization/FvRepresentation.cpp physics/src/discretization/FvRepresentation.h :64b7f6d36b11b6cd94c20cad53463b7deef8c85a: resourceclient/src/resourceclient/ResourcePool.cpp resourceclient/src/resourceclient/ResourcePool.h resourceclient/src/resourceclient/RestClient.cpp resourceclient/src/resourceclient/RestClient.h resourceclient/src/resourceclient/test/ResourcePoolTest.cpp'; preg_match_all($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