$ar1 = array('qw'=>12,1=>85,2=>78);
	$ar2 = array('qw'=>'aaa',1=>"ssss",2=>"dddd");
	$ar = 	array_merge_recursive($ar1, $ar2) ;

Array
(
    [qw] => Array
        (
            [0] => 12
            [1] => aaa
        )

    [0] => 85
    [1] => 78
    [2] => ssss
    [3] => dddd
)