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

/
/
i

Test String

Code Generator

Generated Code

$re = '/([\s\S]*?)[\s]*def (\w+)Impl\((.*)\):[\s]+"""[\s]+([\s\S]*?)[\s]+"""([\s\S]*?)((def|$)[\s\S]*)$/i'; $str = 'def TestUnParamImpl(param1): """ @param param1 string Param named param1 @return return1 string Return named return1 """ """ # Imported code : import json d = json.loads(jsonstr) # To use the input params, simply use d["param1"] # Your code here ret_dict = {} ret_dict["return1"] = "" return json.dumps(ret_dict) """ return { "return1": "string" } def TestDeuxParamsImpl(paramString, paramInt): """ @param paramString string Param named paramString @param paramInt integer Param named paramInt @return returnString string Return named returnString @return returnInt integer Return named returnInt """ """ # Imported code : import json d = json.loads(jsonstr) # To use the input params, simply use d["paramString"] d["paramInt"] # Your code here ret_dict = {} ret_dict["returnString"] = "" ret_dict["returnInt"] = "" return json.dumps(ret_dict) """ return { "returnString": "string", "returnInt": "integer" } '; preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0); // Print the entire match result var_dump($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