Getting Random values from Array

To Get Random Values from Array :

$arr = array("a"=>"apple","b"=>"ball","c"=>"cat","d"=>"dog" );

shuffle($arr);

Eg :

Before Shuffle :

Array ( [a] => apple [b] => ball [c] => cat [d] => dog )

After Shuffle :

Array ( [0] => ball [1] => cat [2] => apple [3] => dog1 )   // will change order every time we refresh the page


To Pick Random Key from Array :

Eg : picking 2 random keys from  an array

$val = array_rand($arr,2);

print_r($val);

Array ( [0] => b [1] => d )