Online PHP editor | refs for SuJQX

<?php var_dump(floatval('Undefined')); echo PHP_EOL; $unresponsives2 = $unresponsives = [ [ "Customer", "172.52.46.75", "2022-04-01 16:20:45", "1817", "nxlog", "2328.02 Hours" ], [ "Customer", "172.25.89.45", "2022-04-01 16:20:45", "1817", "nxlog", "Undefined" ], [ "Customer", "172.19.10.94", "2022-04-01 16:20:45", "1817", "nxlog", "2324.02 Hours" ], [ "Customer", "172.19.10.94", "2022-04-01 16:20:45", "1817", "nxlog", "2322.02 Hours" ], [ "Customer", "172.19.10.94", "2022-04-01 16:20:45", "1817", "nxlog", "Undefined" ], ]; $hours = array_column($unresponsives, 5); if ($undefined = array_keys($hours, 'Undefined')) { $hours = array_replace($hours, array_fill_keys($undefined, PHP_INT_MAX)); } array_multisort($hours, SORT_DESC, SORT_NUMERIC, $unresponsives); var_export($unresponsives); echo PHP_EOL . PHP_EOL; $hours = array_column($unresponsives2, 5); if ($undefined = array_keys($hours, 'Undefined')) { $hours = array_replace($hours, array_fill_keys($undefined, PHP_INT_MIN)); } array_multisort($hours, SORT_ASC, SORT_NUMERIC, $unresponsives2); var_export($unresponsives2);