Are there any potential pitfalls to be aware of when shuffling strings in PHP?

One potential pitfall when shuffling strings in PHP is that the `str_shuffle()` function may not preserve multibyte characters or special characters. To avoid this issue, you can use the `mb_str_split()` function to split the string into an array of characters, shuffle the array, and then use `implode()` to concatenate the shuffled characters back into a string.

$string = "Hello, World!";
$chars = mb_str_split($string);
shuffle($chars);
$shuffledString = implode('', $chars);

echo $shuffledString;