What are the best practices for generating and outputting random numbers in PHP for beginners?

When generating random numbers in PHP, it is important to use the `rand()` function or the `mt_rand()` function to ensure randomness. It is also recommended to set the seed value using `srand()` to avoid getting the same sequence of random numbers on each run. Finally, always remember to properly sanitize and validate the random numbers before outputting them to ensure they meet the desired criteria.

// Generate a random number between 1 and 100
$randomNumber = mt_rand(1, 100);

// Output the random number
echo $randomNumber;