Online PHP editor | refs for G7hlt

<?php $a = array(array("data" => "abcd", "edit" => "1", "day" => "05", "month" => "04", "year" => "2013"), array("data" => "efgh", "edit" => "2", "day" => "07", "month" => "03", "year" => "2013")); function cmp($a, $b) { $date1 = strtotime($a[0]['year'] . "-" . $a[0]['month'] . "-" . $a[0]['day']); $date2 = strtotime($b[0]['year'] . "-" . $b[0]['month'] . "-" . $b[0]['day']); return $date1 - $date2; } usort($a, "cmp"); print_r($a);