What are the potential pitfalls of using array references in PHP?

One potential pitfall of using array references in PHP is that they can lead to unexpected behavior or unintended side effects when modifying the original array. To avoid this, it is recommended to use the `foreach` loop to iterate over arrays instead of directly modifying them using references.

// Incorrect usage of array references
$array = [1, 2, 3];
foreach ($array as &$value) {
    $value *= 2;
}
// $array is now [2, 4, 6]

// Correct usage of foreach loop without references
$array = [1, 2, 3];
foreach ($array as $key => $value) {
    $array[$key] = $value * 2;
}
// $array is now [2, 4, 6]