array_rand function alternative

Strange thing happened with array_rand function after PHP 5.2.10 Release... I should paste it from official site:

"The resulting array of keys is no longer shuffled." 

C'mon i dont even understand now how it works. Anyway some good man make good and also elegant alternative, when you need to shuffle an array and take some entries from it.

 <?php  
 function array_random($arr, $num = 1) {  
   shuffle($arr);  
     
   $r = array();  
   for ($i = 0; $i < $num; $i++) {  
     $r[] = $arr[$i];  
   }  
   return $num == 1 ? $r[0] : $r;  
 }  
   
 $a = array("apple", "banana", "cherry");  
 print_r(array_random($a));  
 print_r(array_random($a, 2));  
 ?>