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

r"
"
gm

Test String

Code Generator

Language

Generated Code

$re = '/keyword_token:\s*(.*?)\s*(\d[a-zA-Z\d-]*)\(([^()]*)\)/m'; $str = '# streetname 1() refers to house number 1 with an empty () additional qualifier keyword_token: street name 4() keyword_token: street name 4a() keyword_token: street name 4Aa() keyword_token: street-name 14() keyword_token: streetname 123()keyword_token: streetname 123() # why is it logged one message per line, but we get the address logged twice - sometimes?? keyword_token: streetname 9(7)keyword_token: streetname 9(7) keyword_token: streetname 27()\\r\\n a lot more text and log messages in the free form text log - one messageper line \\n keyword_token: street-name 1-23(BLOCK D HAUS 6)keyword_token: street-name 1-23(BLOCK H HAUS 2)keyword_token: street-name 1-23(BLOCK G HAUS 3)\', keyword_token: Streetname 96-98(13)'; preg_match_all($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