PHP: usort() custom sorting

PHP

function user_compare($x, $y)

{

if ($x == $y)

return 0;

else if ($x > $y)

return 1;

else

return -1;

}

$array1 = array(22,33,66,55,11);

usort($array1, 'user_compare');

foreach($array1 as $key => $value)

{

echo "$key: $value\n";

}