For internal use

"1.2.3" Group 1: 1 Group 2: 2 Group 3: 3

Match all emojis using unicode

Write a program, which matches a date in the format "dd{separator}MMM{separator}yyyy". Use capturing groups in your regular expression.

A regex for finding a Bulgarian phone. A Softuni task

/preg_replace('!\s+!', ' ', $s)/gm

get facebook page id from html response

sure that can be more shortly, but well... and a newbie

jsonmultikey

'^Subject:.\s((=?^.[?=$]).*)'

Matches and groups categories of semantic versions.

Matches on version syntax, grouping the Major version alone, Minor-Patch, and Label alone.

Matches on whole IP addresses

Matches on IPv4 addresses and groups each octet.

Do the opposite so we can test for invalid characters

parse an edgedb DSN string

Select emails from a string

Letters, space and - , . ' & / 

Letters, numbers, space and  . ,  ' - /

Validación de patentes de Argentina, del tipo XXX### o XX###XX.