3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = 'Hello @1a1a-1a1a and @2B2B2-B2 too'; preg_match_all("/(?<=@)[\w-]+/", $string, $matches); print_r($matches[0]);
Output for 5.6.38, 7.1.0 - 7.1.33, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Array ( [0] => 1a1a-1a1a [1] => 2B2B2-B2 )
preferences:
76.8 ms | 1605 KiB | 4 Q