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

/
/
gms

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 = "(?ms),\s*("subresource_uris":.[^}]*[}])" Local $sString = "{" & @CRLF & _ " "first_page_uri": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/LastMonth.json?PageSize=1000&Page=0"," & @CRLF & _ " "end": 387," & @CRLF & _ " "previous_page_uri": null," & @CRLF & _ " "uri": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/LastMonth.json?PageSize=1000&Page=0"," & @CRLF & _ " "page_size": 1000," & @CRLF & _ " "start": 0," & @CRLF & _ " "usage_records": [" & @CRLF & _ " {" & @CRLF & _ " "category": "wireless-usage"," & @CRLF & _ " "description": "SIM Usage"," & @CRLF & _ " "account_sid": "ACd7a7c24a3c7b0b0ddcde452fd6c18aae"," & @CRLF & _ " "start_date": "2023-01-01"," & @CRLF & _ " "end_date": "2023-01-31"," & @CRLF & _ " "as_of": "2023-02-05T06:53:40+00:00"," & @CRLF & _ " "count": "0"," & @CRLF & _ " "count_unit": "units"," & @CRLF & _ " "usage": "0"," & @CRLF & _ " "usage_unit": "units"," & @CRLF & _ " "price": "0"," & @CRLF & _ " "price_unit": "usd"," & @CRLF & _ " "api_version": "2010-04-01"," & @CRLF & _ " "uri": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/LastMonth.json?Category=wireless-usage&StartDate=2023-01-01&EndDate=2023-01-31"," & @CRLF & _ " "subresource_uris": {" & @CRLF & _ " "all_time": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/AllTime.json?Category=wireless-usage"," & @CRLF & _ " "today": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/Today.json?Category=wireless-usage"," & @CRLF & _ " "yesterday": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/Yesterday.json?Category=wireless-usage"," & @CRLF & _ " "this_month": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/ThisMonth.json?Category=wireless-usage"," & @CRLF & _ " "last_month": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/LastMonth.json?Category=wireless-usage"," & @CRLF & _ " "daily": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/Daily.json?Category=wireless-usage"," & @CRLF & _ " "monthly": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/Monthly.json?Category=wireless-usage"," & @CRLF & _ " "yearly": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/Yearly.json?Category=wireless-usage"" & @CRLF & _ " }" & @CRLF & _ " }," & @CRLF & _ " {" & @CRLF & _ " "category": "pv-basic-rooms"," & @CRLF & _ " "description": "Go Rooms"," & @CRLF & _ " "account_sid": "ACd7a7c24a3c7b0b0ddcde452fd6c18aae"," & @CRLF & _ " "start_date": "2023-01-01"," & @CRLF & _ " "end_date": "2023-01-31"," & @CRLF & _ " "as_of": "2023-02-05T06:53:40+00:00"," & @CRLF & _ " "count": "0"," & @CRLF & _ " "count_unit": ""," & @CRLF & _ " "usage": "0"," & @CRLF & _ " "usage_unit": ""," & @CRLF & _ " "price": "0"," & @CRLF & _ " "price_unit": "usd"," & @CRLF & _ " "api_version": "2010-04-01"," & @CRLF & _ " "uri": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/LastMonth.json?Category=pv-basic-rooms&StartDate=2023-01-01&EndDate=2023-01-31"," & @CRLF & _ " "subresource_uris": {" & @CRLF & _ " "all_time": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/AllTime.json?Category=pv-basic-rooms"," & @CRLF & _ " "today": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/Today.json?Category=pv-basic-rooms"," & @CRLF & _ " "yesterday": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/Yesterday.json?Category=pv-basic-rooms"," & @CRLF & _ " "this_month": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/ThisMonth.json?Category=pv-basic-rooms"," & @CRLF & _ " "last_month": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/LastMonth.json?Category=pv-basic-rooms"," & @CRLF & _ " "daily": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/Daily.json?Category=pv-basic-rooms"," & @CRLF & _ " "monthly": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/Monthly.json?Category=pv-basic-rooms"," & @CRLF & _ " "yearly": "/2010-04-01/Accounts/ACd7a7c24a3c7b0b0ddcde452fd6c18aae/Usage/Records/Yearly.json?Category=pv-basic-rooms"" & @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