3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [0,1,2,3,4,5,6]; $count = count($a); for($i=0;$i<$count;$i++){ echo 's ' . $i.' ' .$a[$i] .PHP_EOL; if ($a[$i]==3) { unset($a[$i]); $count--; $i--; $a=array_merge($a); } echo 'e ' . $i.' ' .$a[$i] .PHP_EOL; }

preferences:
31.93 ms | 402 KiB | 5 Q