สอบถามเรื่องการ rondom array หน่อยครับ แบบให้ key ของ array หรือ ค่าของ array สลับที่กันแบบ random อะครับ ช่วยหน่อยนะครับ ของ javascript

$input = array("a1","a2", "a3", "a4", "a5","x","x","x","x","x","x","x","x","x","x","x","x","x","x","x","x","x","x","x","x","x","x","x","x");
$rand_keys = array_rand($input,sizeof($input));
$new_value_array = array();
foreach( $rand_keys  as $key =>$val){
	  array_push($new_value_array,$input[$val]);
}