Online PHP editor | refs for qNJ9g

<?php $dud = [[2,3,"2018-07-19","08:23",1], [2,3,"2018-07-19","08:30",2], [2,1,"2018-07-19","08:14",3], [2,4,"2018-07-19","07:11",4], [2,1,"2018-07-19","07:17",5], [2,9,"2018-07-19","07:31",6], [2,4,"2018-07-19","05:06",7], [2,6,"2018-07-18","08:10",8], [2,9,"2018-07-19","07:20",9], [1,7,"2018-07-19","08:27",10], [1,5,"2018-07-19","08:11",11], [1,7,"2018-07-18","08:22",12], [1,5,"2018-07-19","08:09",13], [2,6,"2018-07-18","07:12",14], [1,7,"2018-07-18","08:21",15], [1,7,"2018-07-19","07:09",16]]; array_multisort( array_column($dud, 3), array_column($dud, 2), array_column($dud, 1), array_column($dud, 0), $dud ); var_export($dud);