3v4l.org

run code in 500+ PHP versions simultaneously
<?php $array =array("AB","ABC","ABCD","ABCDE","BD"); usort($array, function($x, $y) { return strlen($y)-strlen($x); }); echo $array[0];
Output for 7.1.0 - 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 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
ABCDE
preferences:
110.24 ms | 1460 KiB | 4 Q