Online PHP editor | refs for RhiO9

<?php $str ='[{ "id": 1, "time": "2018-12-16", "pages_indexed": 1024 }, { "id": 2, "time": "2018-12-12", "something": 1024 }, { "id": 3, "time": "2018-12-09", "something": 7 }, { "id": 13, "time": "2018-11-08", "something": 7 }, { "id": 12, "time": "2018-11-12", "something": 7 }]'; $arr = json_decode($str, true); $time = array_column($arr, "time"); array_multisort($time, SORT_DESC, $arr); foreach(array_reverse($arr) as $sub){ $result[substr($sub["time"], 0, 7)]= $sub; } Var_dump($result);