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<?php $arr = [ "2021.06.26" => [ "type1" => [ 0 => ["name" => "name 1", "time" => "16:40:00"], 1 => ["name" => "name 2", "time" => "11:00:00"], 2 => ["name" => "name 3", "time" => "13:15:00"], 3 => ["name" => "name 4", "time" => "22:09:00"], 4 => ["name" => "name 5", "time" => "06:00:00"], ], "type2" => [ 0 => ["name" => "name 6", "time" => "11:40:00"], 1 => ["name" => "name 7", "time" => "19:10:00"], 2 => ["name" => "name 8", "time" => "13:15:00"], 3 => ["name" => "name 9", "time" => "14:20:00"], 4 => ["name" => "name 10", "time" => "00:00:00"], ], ], ]; foreach ($arr as $key => $value) { $arr[$key] = usort( $value, function ($a, $b) { return $a[time] <=> $b["time"]; } ); } print_r($arr);
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