What is the purpose of using srand() or mt_srand() in PHP for generating random numbers?

When generating random numbers in PHP, it is important to use srand() or mt_srand() to seed the random number generator. This ensures that the sequence of random numbers generated is not the same each time the script is run. By seeding the generator with a unique value, such as the current timestamp, we can produce more unpredictable and varied random numbers.

// Seed the random number generator using srand() with the current timestamp
srand(time());

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