Online PHP editor | refs for qIp5d

<?php $array1 = [ [ 'date' => '2012-01-10', 'result' => 65, 'name' => 'Les océans', ], [ 'date' => '2012-01-11', 'result' => 75, 'name' => 'Les mers', ], [ 'date' => '2012-01-13', 'result' => 66, 'name' => 'Les continents', 'type' => 'Scores', ] ]; $array2 = [ [ 'date_end' => '2012-01-12', 'result' => 60, 'name' => 'Step#1', 'type' => 'Summary', ] ]; function cmp($a, $b){ $ad = strtotime($a['date']); $bd = strtotime($b['date']); return ($ad-$bd); } $arr = array_merge($array1, $array2); usort($arr, 'cmp'); var_export($arr);