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)^\s*<VirtualHost\s+[^>]*>\s*ServerName\s+(?P<ServerName>\S+)\s*DocumentRoot\s+(?P<DocumentRoot>.+?)\s*</VirtualHost>" Local $sString = "# Virtual Hosts" & @CRLF & _ "#" & @CRLF & _ "# Required modules: mod_log_config" & @CRLF & _ "" & @CRLF & _ "# If you want to maintain multiple domains/hostnames on your" & @CRLF & _ "# machine you can setup VirtualHost containers for them. Most configurations" & @CRLF & _ "# use only name-based virtual hosts so the server doesn\'t need to worry about" & @CRLF & _ "# IP addresses. This is indicated by the asterisks in the directives below." & @CRLF & _ "#" & @CRLF & _ "# Please see the documentation at " & @CRLF & _ "# <URL:http://httpd.apache.org/docs/2.4/vhosts/>" & @CRLF & _ "# for further details before you try to setup virtual hosts." & @CRLF & _ "#" & @CRLF & _ "# You may use the command line option \'-S\' to verify your virtual host" & @CRLF & _ "# configuration." & @CRLF & _ "" & @CRLF & _ "#" & @CRLF & _ "# Use name-based virtual hosting." & @CRLF & _ "#" & @CRLF & _ "##NameVirtualHost *:80" & @CRLF & _ "#" & @CRLF & _ "# VirtualHost example:" & @CRLF & _ "# Almost any Apache directive may go into a VirtualHost container." & @CRLF & _ "# The first VirtualHost section is used for all requests that do not" & @CRLF & _ "# match a ##ServerName or ##ServerAlias in any <VirtualHost> block." & @CRLF & _ "#" & @CRLF & _ "##<VirtualHost *:80>" & @CRLF & _ " ##ServerAdmin webmaster@dummy-host.example.com" & @CRLF & _ " ##DocumentRoot "D:/xampp/htdocs/dummy-host.example.com"" & @CRLF & _ " ##ServerName dummy-host.example.com" & @CRLF & _ " ##ServerAlias www.dummy-host.example.com" & @CRLF & _ " ##ErrorLog "logs/dummy-host.example.com-error.log"" & @CRLF & _ " ##CustomLog "logs/dummy-host.example.com-access.log" common" & @CRLF & _ "##</VirtualHost>" & @CRLF & _ "" & @CRLF & _ "##<VirtualHost *:80>" & @CRLF & _ " ##ServerAdmin webmaster@dummy-host2.example.com" & @CRLF & _ " ##DocumentRoot "D:/xampp/htdocs/dummy-host2.example.com"" & @CRLF & _ " ##ServerName dummy-host2.example.com" & @CRLF & _ " ##ErrorLog "logs/dummy-host2.example.com-error.log"" & @CRLF & _ " ##CustomLog "logs/dummy-host2.example.com-access.log" common" & @CRLF & _ "##</VirtualHost>" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ "##<VirtualHost *:8080>" & @CRLF & _ " ##ServerName CI1" & @CRLF & _ " ##DocumentRoot D:\xampp\htdocs\codeigniter_1\public" & @CRLF & _ "##</VirtualHost>" & @CRLF & _ "" & @CRLF & _ "<VirtualHost *:8080>" & @CRLF & _ " ServerName CI2" & @CRLF & _ " DocumentRoot D:\xampp\htdocs\codeigniter_2\public" & @CRLF & _ "</VirtualHost>" & @CRLF & _ "" & @CRLF & _ "<VirtualHost *:8080>" & @CRLF & _ " ServerName CI3" & @CRLF & _ " DocumentRoot D:\xampp\htdocs\codeigniter_3\public" & @CRLF & _ "</VirtualHost>" & @CRLF & _ "<VirtualHost *:8080>" & @CRLF & _ " ServerName CI3" & @CRLF & _ " DocumentRoot D:\Embedded Spaces and spaces at end of line\htdocs\codeigniter_3\public " & @CRLF & _ "</VirtualHost>" 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