3v4l.org

run code in 500+ PHP versions simultaneously
<?php $array = [ [ '', 1, '', 108, '', ], [ '', 1, '', 108, '', 101, ], [ '', '', 108, '', ] ]; $array = array_unique(array_filter(array_merge(...$array))); var_dump($array);
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
array(3) { [1]=> int(1) [3]=> int(108) [10]=> int(101) }
preferences:
89.64 ms | 1151 KiB | 4 Q