Regular Expressions 101

Community Patterns

22

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

0

Regular Expression
Created·2020-04-13 13:35
Flavor·PCRE (Legacy)

/
(?# This regex was created for the purposes of detecting potentially compromised credentials for the purposes of information security and not to be used for malicious purposes.) (?<!\d) (?# s - Short [less than 16 digits], m - Medium [16 digits], l - Long [more than 16 digits; not yet implemented]) (?# First four digits) (?: (?# Standard 16 digit numbers) (?<m> (?#MasterCard between 222100-272099) 222[1-9]|223\d|2[3-6]\d{2}|27[01]\d|2720| (?#JCB is between 3528-3589) 352[89]|35[3-8]\d| (?#Visa, MasterCard, Discover) [4-6]\d{3} )| (?#American Express 15 digits | Diners Club 14 digits) (?<s>(?<ax>3[47]\d{2})|(?<dc>30[0-5]\d|36\d{2})) ) (?# Rest of the card number) (?<del>\D+)?(?(<m>)\d{4}(?(<del>)\k{del})\d{4}(?(<del>)\k{del})\d{4}|(?:\d{6})(?(<del>)\k{del})(?(<ax>)\d{5}|\d{4})) (?#END) (?!\d)
/
gmx
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Description

Regex to detect credit card numbers.

This regex was created for the purposes of detecting potentially compromised credentials for the purposes of information security and not to be used for malicious purposes.

Based on data from https://www.freeformatter.com/credit-card-number-generator-validator.html

Currently only works for Visa, MasterCard, Discover, AmEx, JCB, Diners Club and only 16 digits (15 for AmEx, 14 for Diners Club Int'l)

Submitted by anonymous