Shuffle associative array while preserving keys (Fisher–Yates shuffle algorithm)

_shuffle-associtive.php

<?php

function fisherYatesShuffleAssoc(&$items, $seed)
{
    $di = $items;
    @mt_srand($seed);
    $items = array_values($items);
    for ($i = count($items) - 1; $i > 0; $i--)
    {
        $j = @mt_rand(0, $i);
        $tmp = $items[$i];
        $items[$i] = $items[$j];
        $items[$j] = $tmp;
    }
    
    foreach($items as $k => $v) {
       foreach($di as $dk => $dv) {
           if($v == $dv) {
               $items[$dk] = $dv;
               unset($items[$k]);
           }
       } 
    }
    
}

//Example seed:
$id = 1;

//Example assoc. array:
$ph = [
    'one' => 'One',
    'two' => 'Two',
    'three' => 'Three',
    'four' => 'Four',
    'five' => 'Five',
    'six' => 'Six'
];

fisherYatesShuffleAssoc($ph, $id);

print_r($ph);

/* Returns:
 Array
(
    [four] => Four
    [six] => Six
    [three] => Three
    [one] => One
    [five] => Five
    [two] => Two
)
*/

?>