Online PHP editor | refs for a3EeJ

<?php $array = array ( 47 => array ( '2019-02-24' => array ( 'AVA_Id' => 1, 'AVA_Status' => 'Open' ), '2019-02-25' => array ( 'AVA_Id' => 3, 'AVA_Status' => 'Open' ), '2019-02-28' => array ( 'AVA_Id' => 4, 'AVA_Status' => 'Close' ), ), 48 => array ( '2019-02-26' => array ( 'AVA_Id' => 2, 'AVA_Status' => 'Open' ) ) ); $dates = array ( 0 => '2019-02-24', 1 => '2019-02-25', 2 => '2019-02-26', 3 => '2019-02-27', 4 => '2019-02-28', 5 => '2019-03-01', 6 => '2019-03-02' ); foreach ($array as &$arr) { foreach (array_diff($dates, array_keys($arr)) as $date) { $arr[$date] = array('AVA_Id' => 0, 'AVA_Status' => 'no'); } ksort($arr); } print_r($array);