Are there any potential pitfalls or limitations when using chunk_split to split a number into individual digits in PHP?

When using `chunk_split` to split a number into individual digits in PHP, one potential limitation is that it will split the number into chunks of a specified length, rather than individual digits. To split a number into individual digits, you can first convert the number to a string, then use `str_split` to split the string into an array of individual digits.

$number = 12345;
$digits = str_split((string) $number);
print_r($digits);