What potential issues could arise from using the rand() function in the PHP code?

Using the rand() function in PHP can potentially lead to non-uniform distribution of random numbers, as it generates pseudo-random numbers. To ensure a more uniform distribution, it is recommended to use the mt_rand() function instead, which uses the Mersenne Twister algorithm for better randomness.

// Using mt_rand() instead of rand() for better randomness
$randomNumber = mt_rand($min, $max);