IPv4 Address Input

Eircode validation for new postcodes identifiers in Republic of Ireland. Case-insensetive for easier user input. Added optional space separator to follow same pattern as in UK post codes and in examples used in eircode spec.

It won't match single line comments like this one: //* This comment won't be match */ ^ see the double / Works in PHP without the g modifier.

Matches a CSS @media selector, matches outer {} curly brackets, works with every CSS code, minified too.

PHP Basic coding standard Naming Convension pattern: /^\pL_*$/

Captures a palindrome of 9 digits or less

auto prefix ("/") to folder

Matches subdomain, domain and top level in a field that contains a urls. https://www.whatever.you.want ---> whatever.you.want

This regexp was written for Regex Tuesday Challenge - Week Six.

We had an issue where the "hosts=some_var" value could cause mass deployments if the wrong value was passed through. Specifically a comma with nothing surrounding it (i.e. "hosts=,"). This regex will allow us to fail when certain characters are present.

The best way to parse URL via Regex. This can be used in javascript, PHP, etc.

find retwitt hashtag on Twitters and add a label to highlight it.

find retwitt hashtag on Twitters and add a label to highlight it.

Iranian birth date aka tarikh tavalod تاریخ تولد ایرانی ها

Iranian identity code aka shenasname code شماره شناسنامه ایرانی ها

\b can be replicated as (?<=\w)(?=\W)|(?<=\W)(?=\w) Understanding how to create these class transitions can be beneficial for several reasons. In this instance, counting the results of this regex can be used to measure randomness within strings containing multiple character classes.

Every vehicle has a unique Vehicle Identification Number (VIN). This 17 character alpha-numeric sequence and must NOT contain the letters I, O or Q (to avoid confusion with the similar looking digits). So, for example, SALVA2AE4EH877322 is valid, but SALVO2AE4EH877322 is not. By using the \b wor...

This UK postcode regex will match all variants of postcode formats including inner London postcodes (eg SW1A), with optional space (both AL11XP and AL1 1XP are valid) It will reject any postcode that does not specify a valid postcode area. Each part of the postcode is also captured into a capture ...