\+7\s\(\d{3}\)\s\d{3}\s\d{2}\-\d{2}

([0-7]\d{2}(" "|-|\.)?\d{2}(?(2)(" "|-|\.))\d{4}) Finds the first number as 0-7 then matches the next two digits Will check what delimitator (group 2) if any is used finds two digits if a delimitator is used - if it is then use one here, if not then don't (prevents US based zip code + 4 from getti...

collect information from web links

Searches the string for valid URLs. Includes HTTP, HTTPS, and localhost with it's port.

RFC Compliant Email Address (https://datatracker.ietf.org/doc/html/rfc2822)

Solo se admiten numeros, sin espacios al inicio o fin

Sin espacio al inicio o fin, sin caracteres especiales

For internal use

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.