- print_r: documentation ( source)
- usort: documentation ( source)
<?php
$order_list = array (
array ("tangible", 1, 8, 1, 19000),
array ("tangible", 6, 2, 10, NULL),
array ("tangible", 1, 17, 1, 28000)
);
usort($order_list, function ($a, $b) {
if( ($c = $a[1] - $b[1]) !== 0) {
return $c;
} else {
return $b[2] - $a[2];
}
});
print_r($order_list);