Regular Expressions 101

Community Patterns

21

Get path from any text

Created·2023-01-31 14:38
Updated·2023-07-23 20:17
Flavor·PCRE2 (PHP)
Recommended·
Get path (windows style) from any type of text (error message, e-mail corps ...), quoted or not. THIS IS THE SINGLE LINE VERSION ! If you want understand how it work or edit it, go https://regex101.com/r/7o2fyy Relative path are not supported The goal is to catch what "Look like" a path. See the limitations UNC path and prefix path like //./], [//?/] or [//./UNC/] are allowed some url path like [file:///C:/] or [file://] are allowed Catch path quoted with ["] and [']. But these quotes are include with the catch Quoted path is not concerned by limitations Limitations : (only unquoted path) [dot] and [space] is allowed, but not in a row [dot+space] or [space+dot at end of file name isn't catched INSIDE A NAME FILE (or last directory if it is a path to a directory) : [comma] is not supported (it stop the catch) after a first [dot], any [space] stop the catch after a [space], catch is stoped if next character is not a [letter], [digit] or [-] so, double [space] stop the catch Compatibility compatible PCRE, PCRE2 AutoHotkey : don't forget to escape "%" in "`%" /!\ Powershell and .Net /!\\ : this regex need some modification to be interpreted by powershell. You have to replace each (?&CapturGroupName) by \k. Use this powershell code to do this replacement : ` $powershellRegex = @' [Put here the regex to replace (?&CapturGroupName) with \k] '@ -replace '\(\?&(\w+)\)', '\k' ` This example code must return : [Put here the regex to replace \k with \k]
Submitted by nitrateag

Community Library Entry

5

Regular Expression
Created·2015-12-31 12:13
Updated·2023-07-24 12:11
Flavor·ECMAScript (JavaScript)

/
^([a-z0-9]+(?:[._-][a-z0-9]+)*)@([a-z0-9]+(?:[.-][a-z0-9]+)*\.[a-z]{2,})$
/
i
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Description

CheckEmail Login start or end simbols [._- ] .login@domain.com - fail -login@domain.com - fail _login@domain.com - fail login.@domain.com - fail login-@domain.com - fail login_@domain.com - fail

Login double simbol [._-] login..name@domain.com - fail login--name@domain.com - fail login__name@domain.com - fail login_-name@domain.com - fail login_.name@domain.com - fail

Domain start or end simbol [.-] login@-domain.com - fail login@.domain.com - fail login@domain.com. - fail

Domain not march simbol [_] login@dom_ain.com - fail

Domain double simbol [.-] login@domain..com - fail login@domain--domain2.com - fail

Big subdomain login@dom1.dom2.dom-3.dom-4.com - good

Domain end two or more simbol login@domain.c - fail login@domain.ru - good

Login or domain can contain numbers 123login456@123domain456.com - good

<script> var reg = /^([a-z0-9]+(?:[._-][a-z0-9]+)*)@([a-z0-9]+(?:[.-][a-z0-9]+)*\.[a-z]{2,})$/i var result = reg.exec("login@domain.com"); //['login@domain.com', 'login', 'domain.com']; </script>
Submitted by Tikhonov Alexander <123546.90@mail.ru>