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

Code Generator

Language

Generated Code

$re = '/(?<=\d\s,\s)(?!.*\d\s,\s).*/m'; $str = 'Step=10 , Step=11 , Step=12 , Step=13 , Step=14 , Step=15 , Step=16 , Step=18 , Step=17 , Step=20 , Step=19 , Step=25 , Step=21 , Step=26 , Step=28 , Step=24 , Step=22 , Step=23 , Step=27 , Step=30 , Step=29 , Step=35 , Step=34 , Step=32 , Step=31 , Step=38 , Step=37 , Step=36 , Step=50 , Step=45 , Step=48 , Step=41 , Step=52 , Step=42 , Step=57 , Step=65 , Step=61 , Step=62 , Step=64 , Step=54 , Step=53 , Step=59 , Step=63 , Step=84 , Step=71 , SelectedAuthenticationIdentityStores=paddedvalue, NetworkDeviceName=exampledevice, NetworkDeviceGroups=Update Source:All Sources:ACS, NetworkDeviceGroups=Device Type:All Device Types:Wireless, NetworkDeviceGroups=Location:All Locations, ServiceSelectionMatchedRule=Rule-1, IdentityPolicyMatchedRule=Default'; preg_match_all($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