3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'xxABC1xxxABC2xx'; if ( preg_match('/\d[A-Z]+x/', strrev($str), $match) ) echo strrev($match[0]);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 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 - 8.3.27, 8.4.1 - 8.4.14
xABC2

preferences:
138.93 ms | 407 KiB | 5 Q