Regular Expressions 101

Save & Share

  • Regex Version: ver. 2
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

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

r"
"
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)\b\S*[AĂÂÁẮẤÀẰẦẢẲẨÃẴẪẠẶẬĐEÊÉẾÈỀẺỂẼỄẸỆIÍÌỈĨỊOÔƠÓỐỚÒỒỜỎỔỞÕỖỠỌỘỢUƯÚỨÙỪỦỬŨỮỤỰYÝỲỶỸỴAĂÂÁẮẤÀẰẦẢẲẨÃẴẪẠẶẬĐEÊÉẾÈỀẺỂẼỄẸỆIÍÌỈĨỊOÔƠÓỐỚÒỒỜỎỔỞÕỖỠỌỘỢUƯÚỨÙỪỦỬŨỮỤỰYÝỲỶỸỴAĂÂÁẮẤÀẰẦẢẲẨÃẴẪẠẶẬĐEÊÉẾÈỀẺỂẼỄẸỆIÍÌỈĨỊOÔƠÓỐỚÒỒỜỎỔỞÕỖỠỌỘỢUƯÚỨÙỪỦỬŨỮỤỰYÝỲỶỸỴAĂÂÁẮẤÀẰẦẢẲẨÃẴẪẠẶẬĐEÊÉẾÈỀẺỂẼỄẸỆIÍÌỈĨỊOÔƠÓỐỚÒỒỜỎỔỞÕỖỠỌỘỢUƯÚỨÙỪỦỬŨỮỤỰYÝỲỶỸỴAĂÂÁẮẤÀẰẦẢẲẨÃẴẪẠẶẬĐEÊÉẾÈỀẺỂẼỄẸỆIÍÌỈĨỊOÔƠÓỐỚÒỒỜỎỔỞÕỖỠỌỘỢUƯÚỨÙỪỦỬŨỮỤỰYÝỲỶỸỴAĂÂÁẮẤÀẰẦẢẲẨÃẴẪẠẶẬĐEÊÉẾÈỀẺỂẼỄẸỆIÍÌỈĨỊOÔƠÓỐỚÒỒỜỎỔỞÕỖỠỌỘỢUƯÚỨÙỪỦỬŨỮỤỰYÝỲỶỸỴA-Z]+\S*\b" Local $sString = "here are three distinct writing systems that have played a part throughout Vietnamese history. The first written form of Vietnamese is called Chöõ Nho, and is based off of the Chinese script (Janse, 1997). This form of writing was implemented by most, if not all of the government writing, official transactions, taught in schools and used in literature directly after the Chinese rule (Janse, 1997). Đà" & @CRLF & _ "The second dominate writing system is called Chöõ Noâm; witch translates close to vulgar or demotic (Janse, 1997). The writers of Vietnam decided that they wanted their own dialect in witch to write sown their history and customs, rather than using the Chinese dialect being in use for so long (Janse, 1997). Nguyeãn-Thuyeân, also written Haøn Thuyeân, was a poet in the 13th century, and is often deemed the person responsible to the spreading of this script (Janse, 1997). Too create this form two Chinese characters were usually combined into one (Janse, 1997). The first indicated the meaning of the Vietnamese word, and the second the pronunciation of the word (Janse, 1997)." & @CRLF & _ "The third and final form of writing is called Chöõ Quoác Ngöõ; translated national language (Janse, 1997). This form was brought about by catholic mercenaries who wished to translate payer books to a romanticized script around the 17th" & @CRLF & _ "Open Full Document" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ "" & @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