PHPize Online / SQLize Online  /  SQLtest Online

<?php $arr = [ "2021.06.26" => [ "count" => [], "items" => [ 0 => ["name" => "name 6", "time" => "11:40:00"], 1 => ["name" => "name 7", "time" => "19:10:00"], 2 => ["name" => "name 8", "time" => "13:15:00"], 3 => ["name" => "name 9", "time" => "14:20:00"], 4 => ["name" => "name 10", "time" => "00:00:00"], ], ], ]; foreach ($arr["2021.06.26"] as $key => $value) { usort( $arr["2021.06.26"][$key], function ($a, $b) { return $a['time'] <=> $b['time']; } ); } print_r($arr);