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

1

Regular Expression
Created·2020-12-20 10:53
Flavor·JavaScript

/
^(?:[\w]\:|\/)(\/[a-z_\-\s0-9\.]+)+\.(txt|gif|pdf|doc|docx|xls|xlsx|js)$
/
i
Open regex in editor

Description

Recently, I was looking for a regular expression to validate a file path and extension. I found several of them on Google, but none of them fit my requirement. So I decided to put together a version that suits my need. Here is the Regular Expression to validate the file path and extension and it is compatible with JavaScript and ASP.NET. I hope someone will find this information useful and that it will make your programming job easier.

Hide Copy Code ^(?:[\w]:|\)(\[a-z_-\s0-9.]+)+.(txt|gif|pdf|doc|docx|xls|xlsx)$ Explanation Hide Copy Code ^(?:[\w]:|\) -- Begin with x:\ or \

[a-z_-\s0-9.] -- valid characters are a-z| 0-9|-|.|_ (you can add more)

(txt|gif|pdf|doc|docx|xls|xlsx) -- Valid extension (you can add more) Matches Hide Copy Code \192.168.0.1\folder\file.pdf \192.168.0.1\my folder\folder.2\file.gif c:\my folder\abc abc.docx c:\my-folder\another_folder\abc.v2.docx Non-Matches Hide Copy Code \192.168.0.1\folder\fi<le.pdf \192.168.0.1\folder\file.pdf \192.168.0.1\my folder\folder.2.gif c:\my folder\another_folder.docx c:\my folder\another_folder\abc.docx c:\my folder\another_folder\ab*c.v2.docx c:\my?folder\another_folder\abc.v2.docx file.xls

Submitted by anonymous