3v4l.org

run code in 300+ PHP versions simultaneously
<?php $text = "This is a text with some@email.com an e-mail address in it"; echo preg_replace_callback( '~[\w.-]+@(?:[\w-]+\.)+\w+~', function($m) { return "**{$m[0]}**"; }, $text );
Output for 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
This is a text with **some@email.com** an e-mail address in it

preferences:
131.14 ms | 407 KiB | 5 Q