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

~
~
xsmg

Test String

Code Generator

Generated Code

#include <StringConstants.au3> ; to declare the Constants of StringRegExp #include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate Local $sRegex = "(?xsm)\s* # white spaces" & @CRLF & _ "########################## KEYS START ##########################" & @CRLF & _ "(?: # We\'ll use this to make keys optional" & @CRLF & _ "(?P<keys> # named group: keys" & @CRLF & _ "\d+ # match digits" & @CRLF & _ "| # or" & @CRLF & _ ""(?(?=\\\\")..|[^"])*" # match string between "", works even 4 escaped ones "hello \" world"" & @CRLF & _ "| # or" & @CRLF & _ "\'(?(?=\\\\\')..|[^\'])*\' # match string between \'\', same as above :p" & @CRLF & _ "| # or" & @CRLF & _ "\$\w+(?:\[(?:[^[\]]|(?R))*\])* # match variables $_POST, $var, $var["foo"], $var["foo"]["bar"], $foo[$bar["fail"]]" & @CRLF & _ ") # close group: keys" & @CRLF & _ "########################## KEYS END ##########################" & @CRLF & _ "\s* # white spaces" & @CRLF & _ "=> # match =>" & @CRLF & _ ")? # make keys optional" & @CRLF & _ "\s* # white spaces" & @CRLF & _ "########################## VALUES START ##########################" & @CRLF & _ "(?P<values> # named group: values" & @CRLF & _ "\d+ # match digits" & @CRLF & _ "| # or" & @CRLF & _ ""(?(?=\\\\")..|[^"])*" # match string between "", works even 4 escaped ones "hello \" world"" & @CRLF & _ "| # or" & @CRLF & _ "\'(?(?=\\\\\')..|[^\'])*\' # match string between \'\', same as above :p" & @CRLF & _ "| # or" & @CRLF & _ "\$\w+(?:\[(?:[^[\]]|(?R))*\])* # match variables $_POST, $var, $var["foo"], $var["foo"]["bar"], $foo[$bar["fail"]]" & @CRLF & _ "| # or" & @CRLF & _ "array\s*\((?:[^()]|(?R))*\) # match an array()" & @CRLF & _ "| # or" & @CRLF & _ "\[(?:[^[\]]|(?R))*\] # match an array, new PHP array syntax: [1, 3, 5] is the same as array(1,3,5)" & @CRLF & _ "| # or" & @CRLF & _ "(?:function\s+)?\w+\s* # match functions: helloWorld, function name" & @CRLF & _ "(?:\((?:[^()]|(?R))*\)) # match function parameters (wut), (), (array(1,2,4))" & @CRLF & _ "(?:(?:\s*use\s*\((?:[^()]|(?R))*\)\s*)? # match use(&$var), use($foo, $bar) (optionally)" & @CRLF & _ "\{(?:[^{}]|(?R))*\} # match { whatever}" & @CRLF & _ ")?;? # match ; (optionally)" & @CRLF & _ ") # close group: values" & @CRLF & _ "########################## VALUES END ##########################" & @CRLF & _ "\s* # white spaces" Local $sString = "0 => "a", 123 => 123, 1234, 'got problem ?', " & @CRLF & _ " "a" => $GlobalScopeVar, " & @CRLF & _ "$test_further => function test($noway){echo "this works too !!!";}, " & @CRLF & _ ""yellow" => "blue"," & @CRLF & _ " "b" => array("nested"=>array(1,2,3), "nested"=>array(1,2,3),"nested"=>array(1,2,3)), " & @CRLF & _ ""c" => function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; }," & @CRLF & _ " "bug",$var = $_POST["test];" & @CRLF & _ " "fixed", " & @CRLF & _ ""mwahahahaa" => "Yeaaaah"," & @CRLF & _ "$_POST["hello"][\'world\'] => array("is", "actually", "An array !")" Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH) Local $aFullArray[0] For $i = 0 To UBound($aArray) -1 _ArrayConcatenate($aFullArray, $aArray[$i]) Next $aArray = $aFullArray ; Present the entire match result _ArrayDisplay($aArray, "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 AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm