Random array element

Returns a random element of a given array.

function random_array_element(&$a){
    // get all array keys:
    $k = array_keys($a);
    // find a random array key:
    $r = mt_rand(0, count($k)-1);
    $rk = $k[$r];
    // return the random key (if exists):
    return isset($a[$rk]) ? $a[$rk] : '';
Snippet Details

// works with both array types:
$array = array(1,2,3);
// and also:
$array = array('one' => 1, 'two' => 2, 'three' => 3);
// example:
print random_array_element($array);

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Older comments:

78945612301234567890qwertyuiopasdfghjklzxcvbnm May 21, 2010 at 04:40
Smith-Investment April 05, 2009 at 08:51
Last line "return isset($a[$rk]) ? $a[$rk] : '';"
Is a useful code.
Julian May 25, 2008 at 17:47
Miguel April 12, 2008 at 22:26
Exactly what I was looking for, thank you!
Donald April 04, 2008 at 22:56
Just use the built-in function array_rand().