Match full SSN

This little regex is taking an email and creating 2 group first is for before the @ sign and the second is for after the @ sign

Exclude certain tags with OR

123 456 7890 (123) 456 7890 (123) 456-7890 1234567890 123 456 7890 123 4567890...

A well-documented, easy to modify bulletproof regular expression that matches complete URLs or URL components. Components include: Schema scheme/protocol**: use an OR statement to add FTP, etc....

This is a number also 123-456-7890 This is not a number: 123456 This is not a number, but an address 123 456 My parameters are 90/60/90 - 120/150/120 - not a phone number I am cheeky and I use letter 0 instead of zero 604_213_0293 Or I use | symbol and also 604_2|3_0293 may happen...

https://www.php-fig.org/psr/psr-16/ Key - A string of at least one character that uniquely identifies a cached item. Implementing libraries MUST support keys consisting of the characters A-Z, a-z, 0-9, _, and . in any order in UTF-8 encoding and a length of up to 64 characters. Implementing librarie...

The is helpful for parsing the symbolic reference of a PHP class object for validation or just determining the type and target for the operator. The expression is intended for working with classes and class methods, so the value on the right of the Paamayim Nekudotayim :: will alway be regarded as ...

basic email validation

Just a little regex for the tailwind css color classes, It could be improved.

When you want to parse a litteral math expression with power in and you want e^x to be e**x Use this regex!