3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ '1,2,1,23,5,2', '1,1,1,2,3,2', '2,3,4', '1,2,3', '1,2,3,4', '1,2,3,10', '1,2,3,4', '1,2,3', '3,2,2' ]; var_export(array_count_values(explode(',', implode(',', $array))));
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
array ( 1 => 10, 2 => 12, 23 => 1, 5 => 1, 3 => 8, 4 => 3, 10 => 1, )
preferences:
63.27 ms | 403 KiB | 62 Q