Online PHP editor | refs for iGp1O

<?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; for($i = $first; $i += 1; $i <= $last) { $v = $a[$i]; echo "Found $v at index $i\n"; if ($v == 1) { swap($a, $i, $first); } if ($v == 3) { swap($a, $i, $last); } } echo implode(" ", $a) . "\n"; function swap(&$arr, $k1, $k2) { echo "Swapping $k1 and $k2\n"; $tmp = $arr[$k2]; $arr[$k2] = $arr[$k1]; $arr[$k1] = $tmp; }