00 What are & why use regular expressions

Test preg_match online. Execute preg_match with this online tool preg_match() - Perform a regular expression match. Preg Match Online Tool.

Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.

Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.

RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp). Supports JavaScript & PHP/PCRE RegEx. Results update in real-time ...

Test and run preg_match online in your browser. Searches $subject for all matches to the regular expression given in $pattern and puts them in $matc.

Test PHP regular expressions live in your browser and generate sample code for preg_match, preg_match_all, preg_replace, preg_grep, and preg_split!

My favorite RegEx resource. I'm a complete RegEx noob, and have only ever put some together with this site.

Test your Javascript and PCRE regular expressions online.

Test and debug your regular expressions with Site24x7's Regex Tester for JavaScript, PHP, and Python. Simplify your coding with our easy-to-use tool!

A regular expression is a sequence of characters that forms a search pattern. When you search for data in a text, you can use this search pattern to describe ...