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

/
/
gix

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 = "(?ix)(?:" & @CRLF & _ " (?<alpha>[a-z])" & @CRLF & _ " (?<digit>[0-9])" & @CRLF & _ " (?<unreserved>\g<alpha>|\g<digit>|-|\.|_|~)" & @CRLF & _ " (?<hexdig>\g<digit>|[A-F])" & @CRLF & _ " (?<pct_encoded>%\g<hexdig>{2})" & @CRLF & _ " (?<gen_delims>[:\/\?\#\[\]@])" & @CRLF & _ " (?<sub_delims>[!\$&'\(\)\*\+,;=])" & @CRLF & _ " (?<reserved>\g<gen_delims>|\g<sub_delims>)" & @CRLF & _ "" & @CRLF & _ " (?<ip_literal>\[(?:\g<ipv6address>|\g<ipvfuture>)\])" & @CRLF & _ " (?<ipvfuture>v\g<hexdig>+\.(?:\g<unreserved>|\g<sub_delims>|:)+)" & @CRLF & _ " (?<ipv6address>" & @CRLF & _ " (?:\g<h16>:){6}\g<ls32> |" & @CRLF & _ " ::(?:\g<h16>:){5}\g<ls32> |" & @CRLF & _ " (?: \g<h16>)?::(?:\g<h16>:){4}\g<ls32> |" & @CRLF & _ " (?:(?:\g<h16>:){0,1}\g<h16>)?::(?:\g<h16>:){3}\g<ls32> |" & @CRLF & _ " (?:(?:\g<h16>:){0,2}\g<h16>)?::(?:\g<h16>:){2}\g<ls32> |" & @CRLF & _ " (?:(?:\g<h16>:){0,3}\g<h16>)?::(?:\g<h16>:){1}\g<ls32> |" & @CRLF & _ " (?:(?:\g<h16>:){0,4}\g<h16>)?:: \g<ls32> |" & @CRLF & _ " (?:(?:\g<h16>:){0,5}\g<h16>)?:: \g<h16> |" & @CRLF & _ " (?:(?:\g<h16>:){0,6}\g<h16>)?::" & @CRLF & _ " )" & @CRLF & _ " (?<h16>\g<hexdig>{1,4})" & @CRLF & _ " (?<ls32>\g<h16>:\g<h16>|\g<ipv4address>)" & @CRLF & _ "" & @CRLF & _ " (?<ipv4address>\g<dec_octet>\.\g<dec_octet>\.\g<dec_octet>\.\g<dec_octet>)" & @CRLF & _ " (?<dec_octet>" & @CRLF & _ " 25[0-5] | # 250-255" & @CRLF & _ " 2[0-4]\g<digit> | # 200-249" & @CRLF & _ " 1\g<digit>{2} | # 100-199" & @CRLF & _ " [1-9]\g<digit> | # 10-99" & @CRLF & _ " \g<digit> # 0-9" & @CRLF & _ " )" & @CRLF & _ " (?<reg_name>(?:\g<unreserved>|\g<pct_encoded>|\g<sub_delims>)*)" & @CRLF & _ " " & @CRLF & _ " (?<path_abempty>(?:\/\g<segment>)*)" & @CRLF & _ " (?<path_absoloute>\/(?:\g<segment_nz>(?:\/\g<segment>)*))" & @CRLF & _ " (?<path_noscheme>\g<segment_nz_nc>(?:\/\g<segment>)*)" & @CRLF & _ " (?<path_rootless>\g<segment_nz>(?:\/\g<segment>)*)" & @CRLF & _ " (?<path_empty>)" & @CRLF & _ " " & @CRLF & _ " (?<segment> \g<pchar>*)" & @CRLF & _ " (?<segment_nz> \g<pchar>+)" & @CRLF & _ " (?<segment_nz_nc>(?:\g<unreserved>|\g<pct_encoded>|\g<sub_delims>|@)+) # non-zero-length segment without any colon ":"" & @CRLF & _ " " & @CRLF & _ " (?<pchar>\g<unreserved>|\g<pct_encoded>|\g<sub_delims>|:|@)" & @CRLF & _ "){0}" & @CRLF & _ "" & @CRLF & _ "(?<scheme>" & @CRLF & _ " \g<alpha>" & @CRLF & _ " (?:\g<alpha>|\g<digit>|\+|-|\.)*" & @CRLF & _ ")" & @CRLF & _ ":" & @CRLF & _ "(?<heir_part>" & @CRLF & _ " (?:" & @CRLF & _ " \/\/" & @CRLF & _ " (?<authority>" & @CRLF & _ " (?:(?<userinfo>(?:\g<unreserved>|\g<pct_encoded>|\g<sub_delims>|:)*)@)?" & @CRLF & _ " (?<host>\g<ip_literal>|\g<ipv4address>|\g<reg_name>)" & @CRLF & _ " (?::(?<port>\g<digit>*))?" & @CRLF & _ " )" & @CRLF & _ " )?" & @CRLF & _ " (?<path>(?(<authority>)" & @CRLF & _ " \g<path_abempty> | # begins with "/" or is empty" & @CRLF & _ " (?:" & @CRLF & _ " \g<path_absoloute> | # begins with "/" but not "//"" & @CRLF & _ " \g<path_rootless> | # begins with a segment" & @CRLF & _ " \g<path_noscheme> | # begins with a non-colon segment" & @CRLF & _ " \g<path_empty> # zero characters" & @CRLF & _ " )" & @CRLF & _ " ))" & @CRLF & _ ")" & @CRLF & _ "(?:\?(?<query>(?:\g<pchar>|\/|\?)*))?" & @CRLF & _ "(?:\#(?<fragment>(?:\g<pchar>|\/|\?)*))?" Local $sString = "ftp://ftp.is.co.za/rfc/rfc1808.txt" & @CRLF & _ "http://www.ietf.org/rfc/rfc2396.txt" & @CRLF & _ "ldap://[2001:db8::7]/c=GB?objectClass?one" & @CRLF & _ "mailto:John.Doe@example.com" & @CRLF & _ "news:comp.infosystems.www.servers.unix" & @CRLF & _ "tel:+1-816-555-1212" & @CRLF & _ "telnet://192.0.2.16:80/" & @CRLF & _ "urn:oasis:names:specification:docbook:dtd:xml:4.1.2" & @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