Regular Expressions 101

Save & Share

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
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

/
/
uxmg

Test String

Code Generator

Language

Generated Code

#include <StringConstants.au3> ; to declare the Constants of StringRegExp #include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate Local $sRegex = "(?uxm)(?(DEFINE)" & @CRLF & _ " (?<protocol> (?<=^|[^a-z]) [a-z]+? : )" & @CRLF & _ " (?<domain> (?:[a-z\-]+\.)+[a-z\-]+ )" & @CRLF & _ " (?<ip> (?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?) )" & @CRLF & _ " (?<port> (?<!\s):\d+(?=\/|$|\s))" & @CRLF & _ " (?<pathquery>[A-Za-z\d\!\*\(\)\;\:\@\&\=\+\$\,\/\?\#\[\]\%\{\}\|\\\^\`\~]+)" & @CRLF & _ " (?<url> (?&protocol) (?: (?:\/\/) (?: (?&domain) | (?&ip) ) (?&port)? )? (?&pathquery))" & @CRLF & _ ")" & @CRLF & _ "(?&url)" Local $sString = "http://en.wikipedia.org/wiki/A#CITEREFSimpsonWeiner1989里面找 以上URL" & @CRLF & _ "下载地址magnet:?xt=urn:btih:65F16B126D8A656E4FC825DE204EBFAF04B070FC里面找 以上URL" & @CRLF & _ "magnet:" & @CRLF & _ "net:" & @CRLF & _ "以下URLhttps://en.wikipedia.org/wiki/A#CITEREFSimpsonWeiner1989里面找 以上URL" & @CRLF & _ "http://192.168.1.1/里面找" & @CRLF & _ "'https://en.wikipedia.org/wiki/A/////#CITEREFSimpsonWeiner1989'" & @CRLF & _ "http://192.168.1.1:80/ 里面找" & @CRLF & _ "以下URL" & @CRLF & _ "https://google.com/search?q=%E5%9F%9F%E5%90%8D#newwindow=1&q=%E5%9F%9F%E5%90%8D+%E5%AD%97%E7%AC%A6" & @CRLF & _ "" & @CRLF & _ "http://en.wikipedia.org/wiki/A#CITEREFSimpsonWeiner1989" & @CRLF & _ "magnet:?xt=urn:btih:65F16B126D8A656E4FC825DE204EBFAF04B070FC" & @CRLF & _ "https://en.wikipedia.org/wiki/A#CITEREFSimpsonWeiner1989" & @CRLF & _ "http://192.168.1.1/" & @CRLF & _ "https://en.wikipedia.org/wiki/A/////#CITEREFSimpsonWeiner1989" & @CRLF & _ "http://192.168.1.1:80/" & @CRLF & _ "https://google.com/search?q=%E5%9F%9F%E5%90%8D#newwindow=1&q=%E5%9F%9F%E5%90%8D+%E5%AD%97%E7%AC%A6" & @CRLF & _ "" 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