What are regular expressions?

A regular expression (regex or regexp for short) is a special text string for describing a search pattern.It is unlimited what a regular expression can include and/or exclude. Here we will be listing the most popular user-requested examples:

Wildcard examples: (where * can be anything)
1: www.example.com/pages/*
Text: ^(http|https):\/\/example.com\/pages\/.*$

2: www.example.com/pages/*/article/
Text: ^(http|https):\/\/example.com\/pages\/[^\/]+\/article\/$

3: www.example.com/user//profile/ (numeric user_id)
Text: ^(http|https):\/\/example.com\/user\/[0-9]+\/profile\/$



Wildcard excluding a certain pattern:
Target all pages which match the pattern but no not include the word “article” or “post”:
www.example.com/pages/*/subpage/
Text: ^(http|https):\/\/example.com\/pages\/(?!article|post)[^\/]+\/subpage\/$



Excluding certain words or patterns in a URL:
1: Target all pages which do not include “/somepage” and “/someotherpage”
Text: ^((?!\/somepage|\/someotherpage).)*$
2: Target pages which include the word “page” and do not include “somepage”
Text: (?=.*page.*)(?!.*otherpage).*
Multiple pages which don’t follow any pattern:
Text: ^(http|https):\/\/example.com\/pages\/(article-one|some-random-word|another-post)\/details\/$