Online PHP editor | refs for IDq5b

<?php function cmp($a, $b) { if ($a == $b) { return 0; } echo "a".$a."b".$b."\n"; return ($a > $b) ? -1 : 1; } $a = array(3, 2, 5, 6, 1); usort($a, "cmp"); foreach ($a as $key => $value) { echo "$key: $value\n"; } $b = $a; sort($b); echo "B:\n"; foreach ($a as $key => $value) { echo "$key: $value\n"; }