3v4l.org

run code in 300+ PHP versions simultaneously
<?php $srv = array('build', 'calss'); for ($i = 0; $i < 1000; $i++) { $srv_keys = array_keys($srv); $cant_be_together = array('build', 'class'); if(count(array_intersect($srv_keys, $cant_be_together)) === count($cant_be_together)) { $str = $i; } }
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6

preferences:
212.07 ms | 404 KiB | 241 Q