Letters, numbers, space and  . ,  ' - /

Letters, space and - , . ' & / 

Select emails from a string

parse an edgedb DSN string

Do the opposite so we can test for invalid characters

Matches on IPv4 addresses and groups each octet.

Matches on whole IP addresses

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

Matches and groups categories of semantic versions.

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

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

get facebook page id from html response

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

A regex for finding a Bulgarian phone. A Softuni task

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

Match all emojis using unicode

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

For internal use

For internal use

Sin espacio al inicio o fin, sin caracteres especiales