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

Substitution

Processing...

Code Generator

Language

Generated Code

$re = '/,([^,]*,?)/m'; $str = ' POLYGON (( 106.812271, -6.361551, 106.812111, -6.361339, 106.81205, -6.361177, 106.81206, -6.360905, 106.812055, -6.360582, 106.812065, -6.360218, 106.812293, -6.359295, 106.812593, -6.358644, 106.812436, -6.358406, 106.8121515, -6.3582051, 106.8123, -6.357823, 106.81244, -6.357407, 106.812612, -6.356842, 106.812719, -6.356544, 106.81274, -6.356384, 106.812864, -6.356148, 106.813019, -6.356021, 106.813287, -6.355797, 106.813781, -6.355286, 106.814076, -6.354751, 106.814277, -6.354393, 106.814403, -6.354027, 106.814553, -6.353814, 106.814736, -6.353526, 106.814993, -6.353302, 106.81516, -6.353024, 106.815358, -6.35279, 106.815509, -6.352588, 106.815675, -6.352331, 106.8153007, -6.3521138, 106.8151398, -6.3520137, 106.8149789, -6.3518005, 106.8147643, -6.3516939, 106.8144639, -6.3516245, 106.8141527, -6.3515392, 106.8135734, -6.351342, 106.813171, -6.3512034, 106.8123284, -6.3509219, 106.8122418, -6.3511298, 106.8118164, -6.3521534, 106.8116597, -6.3525047, 106.8111849, -6.3535692, 106.8102245, -6.3554942, 106.8093545, -6.3568947, 106.8085097, -6.3580518, 106.80795, -6.358832, 106.8077793, -6.3590429, 106.807668, -6.359441, 106.807499, -6.360346, 106.8072531, -6.3616378, 106.8071476, -6.3622599, 106.8070637, -6.3626798, 106.8070823, -6.3629367, 106.8071207, -6.3634531, 106.8078269, -6.363831, 106.809448, -6.364124, 106.810574, -6.364198, 106.81066, -6.362993, 106.811175, -6.36277, 106.812087, -6.361703, 106.812271, -6.361551))'; $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