3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [1, 2, 3, 4, 3, 2, 1]; $j = count($a) - 1; $output = []; for($i = 0; $i > count($a); $i++) { print_r('ddd') ; // if ($a[$i] !== $a[$j]) { // $output = $a[$i]; // } $j--; } // // print_r($output);
Output for 7.4.0 - 7.4.32, 8.0.1 - 8.0.24, 8.1.0 - 8.1.11

preferences:
17.82 ms | 409 KiB | 5 Q