สอบถามการ Random ค่าใน Array ครับ พอดีคิดไม่ออกว่าจะ Random ค่าออกมายังไง

Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 [6] => 7 [7] => 8 [8] => 9 [9] => 10 [10] => 54 [11] => 55 )

$number = array( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 [6] => 7 [7] => 8 [8] => 9 [9] => 10 [10] => 54 [11] => 55 );
$number_rand = array();
$output = array_rand($number,10);
for ($i=0; $i < sizeof($output); $i++) { 
   array_push($number_rand, $number[ $output[$i] ]);
}
print_r($number_rand);