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

/
/
gm

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 $sRegex = "(?m)^([a-zA-Z0-9!#$%&'*+\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&'*+\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?)$" Local $sString = "--------- valid ---------" & @CRLF & _ "something@something.com" & @CRLF & _ "someone@localhost.localdomain" & @CRLF & _ "someone@127.0.0.1" & @CRLF & _ "a@b.b" & @CRLF & _ "a/b@domain.com" & @CRLF & _ "{}@domain.com" & @CRLF & _ "m*'!%@something.sa" & @CRLF & _ "tu!!7n7.ad##0!!!@company.ca" & @CRLF & _ "%@com.com" & @CRLF & _ "!#$%&'*+/=?^_`{|}~.-@com.com" & @CRLF & _ "USER@EXAMPLE.COM" & @CRLF & _ "someone@do-ma-in.com" & @CRLF & _ "a@p.com" & @CRLF & _ "" & @CRLF & _ "-------- invalid --------" & @CRLF & _ "somebody@example" & @CRLF & _ " a@p.com" & @CRLF & _ ".wooly@example.com" & @CRLF & _ "wo..oly@example.com" & @CRLF & _ "invalid:email@example.com" & @CRLF & _ "@somewhere.com" & @CRLF & _ "example.com" & @CRLF & _ "@@example.com" & @CRLF & _ "a space@example.com" & @CRLF & _ "something@ex..ample.com" & @CRLF & _ "a\b@c" & @CRLF & _ "----- empty string ----" & @CRLF & _ "" & @CRLF & _ "-------- space --------" & @CRLF & _ " " & @CRLF & _ "someone@somewhere.com." & @CRLF & _ "\"\"test\blah\"\"@example.com" & @CRLF & _ "\"testblah\"@example.com" & @CRLF & _ "someone@somewhere.com@" & @CRLF & _ "someone@somewhere_com" & @CRLF & _ "someone@some:where.com" & @CRLF & _ "." & @CRLF & _ "F/s/f/a@feo+re.com" & @CRLF & _ "some+long+email+address@some+host-weird-/looking.com" & @CRLF & _ "a @p.com" & @CRLF & _ "a\u0020@p.com" & @CRLF & _ "a\u0009@p.com" & @CRLF & _ "a\u000B@p.com" & @CRLF & _ "a\u000C@p.com" & @CRLF & _ "a\u2003@p.com" & @CRLF & _ "a\u3000@p.com" & @CRLF & _ "ddjk-s-jk@asl-.com" & @CRLF & _ "someone@do-.com" & @CRLF & _ "somebody@-p.com" & @CRLF & _ "somebody@-.com" 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