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

/
/
gm

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 = "(?m)(?<=gps.longitude)(\s*)(:\s)(?<lon>.*)\n.*(?<=gps.latitude)(\s*)(:\s)(?<lat>.*)" Local $sString = "modem.location.3gpp.mcc : 310" & @CRLF & _ "modem.location.3gpp.mnc : 260" & @CRLF & _ "modem.location.3gpp.lac : FFFE" & @CRLF & _ "modem.location.3gpp.tac : 7D84" & @CRLF & _ "modem.location.3gpp.cid : 027A6B84" & @CRLF & _ "modem.location.gps.nmea.length : 5" & @CRLF & _ "modem.location.gps.nmea.value[1] : $GPGSA,A,2,08,10,18,22,24,32,,,,,,,1.2,0.9,0.8*36" & @CRLF & _ "modem.location.gps.nmea.value[2] : $GPRMC,194501.0,A,2947.759106,N,09534.022631,W,0.0,0.0,090922,3.2,E,A*15" & @CRLF & _ "modem.location.gps.nmea.value[3] : $GPGSV,3,1,10,08,09,303,31,10,53,343,29,15,02,053,19,18,43,147,26*71\r\n$GPGSV,3,2,10,22,31,239,31,24,34,057,29,27,23,268,21,31,00,196,19*76\r\n$GPGSV,3,3,10,32,55,260,22,46,,,34*48" & @CRLF & _ "modem.location.gps.nmea.value[4] : $GPVTG,0.0,T,356.8,M,0.0,N,0.0,K,A*2B" & @CRLF & _ "modem.location.gps.nmea.value[5] : $GPGGA,194501.0,2947.759106,N,09534.022631,W,1,06,0.9,28.1,M,-21.0,M,,*57" & @CRLF & _ "modem.location.gps.utc : 194501.0" & @CRLF & _ "modem.location.gps.longitude : -95.567044" & @CRLF & _ "modem.location.gps.latitude : 29.795985" & @CRLF & _ "modem.location.gps.altitude : 28.100000" & @CRLF & _ "modem.location.cdma-bs.longitude : --" & @CRLF & _ "modem.location.cdma-bs.latitude : --" 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