3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'xxABC1xxxABC2xx'; if ( preg_match('/x[A-Z]+\d(?!.*x[A-Z]+\d)/', $str, $match) ) print_r($match[0]);

This is an error 500

Value for `_results` contains invalid data `array`


preferences:
160.61 ms | 2285 KiB | 12 Q