What is the function in PHP that can be used to generate random numbers?

To generate random numbers in PHP, you can use the built-in function `rand()`. This function takes two parameters, the minimum and maximum values of the range from which you want to generate a random number. For example, `rand(1, 100)` will generate a random number between 1 and 100.

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