PHP gmp_random_seed() function

As of my last update in September 2021, PHP does not have a built-in gmp_random_seed() function in the GMP (GNU Multiple Precision) extension.

In PHP, the GMP extension provides functions for arbitrary precision arithmetic with integers but does not have a specific function for seeding the random number generator. To generate random numbers with GMP, you can use functions like gmp_random_bits() or other random number generation functions available in PHP.

If you need to seed the random number generator for regular PHP random number functions like rand() or random_int(), you can use the srand() function to set the seed for the random number generator.

Here’s an example of using srand() to seed the random number generator in PHP:

$seed = 12345;
srand($seed);

$randomNumber = rand();

echo $randomNumber; // Output: A random number based on the seed

Please note that if you are looking for a more secure way to generate cryptographically secure random numbers, you should use random_int() instead of rand(). random_int() automatically uses a cryptographically secure random number generator (CSPRNG) provided by the operating system.

$secureRandomNumber = random_int(0, PHP_INT_MAX);

echo $secureRandomNumber; // Output: A cryptographically secure random number

Keep in mind that the availability of functions and their features may change in newer PHP versions, so always refer to the PHP manual for the specific version you are using.