3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1,2,1,3,2,1,3,2,1,3,2,1,2,3,1,2,3); echo implode(" ", $a) . "\n"; $first = 0; $last = sizeof($a) - 1; foreach($a as $k => $v) { // echo "Found $v at index $k\n"; if ($v == 1) { swap($a, $k, $first); } if ($v == 3) { swap($a, $k, $last); } } echo implode(" ", $a) . "\n"; function swap(&$arr, $k1, $k2) { $tmp = $arr[$k2]; $arr[$k2] = $arr[$k1]; $arr[$k1] = $tmp; }
Output for git.master, git.master_jit, rfc.property-hooks
1 2 1 3 2 1 3 2 1 3 2 1 2 3 1 2 3 1 2 1 3 2 1 3 2 1 3 2 1 2 3 1 2 3

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