What are the potential pitfalls of using the rand() function in PHP for generating random numbers?

The potential pitfall of using the rand() function in PHP is that it is not cryptographically secure, meaning the generated numbers may not be truly random and could be predicted or manipulated by an attacker. To generate more secure random numbers, you should use the random_int() function in PHP instead.

$secure_random_number = random_int($min, $max);