Online PHP editor | refs for ZA70u

<?php $array = array ( 'strMachineGroupID' => 'MC000027', 'strMachineGroup' => 1, 'April-201904_QTY' => 1, 'February-201902_QTY' => 1, 'January-201901_QTY' => 1, 'July-201907_QTY' => 1, 'June-201906_QTY' => 1, 'March-201903_QTY' => 1, 'May-201905_QTY' => 1, 'strMachineGroupIDUE' => 'MC000027', 'April-201904_UE' => 1.00, 'February-201902_UE' => 1.00, 'January-201901_UE' => 1.00, 'July-201907_UE' => 1.00, 'June-201906_UE' => 1.00, 'March-201903_UE' => 1.00, 'May-201905_UE' => 1.00 ); uksort($array, function ($k1, $k2) { if (preg_match('/^\w+-(\d{6})_\w+$/', $k1, $m1)) { if (preg_match('/^\w+-(\d{6})_\w+$/', $k2, $m2)) { // both have dates, sort on that return strcmp($m1[1], $m2[1]); } else { // dates sort first return -1; } } elseif (preg_match('/^\w+-(\d{6})_\w+$/', $k2, $m2)) { // dates sort first return 1; } else { // neither is a date, sort alphabetically return strcmp($k1, $k2); } }); print_r($array);