reproducible random number series

How can i get a series of reproducible pseudorandom numbers in PHP?

In older versions of PHP i could do that just by using the same seed in the RNG, but it does not work anymore since PHP has changed the way rand and mt_rand works.

Please also see this comment in PHP.net page:

Keep in mind that the Suhosin patch which is installed by default on many PHP-installs such as Debian and DirectAdmin completely disables the srand and mt_srand functions for encryption security reasons. To generate reproducible random numbers from a fixed seed on a Suhosin-hardened server you will need to include your own pseudorandom generator code.

link of that comment: http://www.php.net/manual/en/function.srand.php#102636

Is there any solution ready? I do not have the time nor the experience to create my own pseudo-random generator code.

My goal is to have a code

<?php
   //( pseudo random code here...)
   $the_seed = 123; // 123 is just a number for demo purposes, NOT a static number
                    //...i hope you get the idea. It's just a hardcoded seed,
                    // it could be a seed based on a user-id, a date etc...
                    // we need the same output for a given seed.
   //( pseudo random code here...)

   // ...and finally
   echo $the_random_number;
 ?>

so everytime i visit this page i should get the same number.

回答1:

The Mersenne Twist is a nice fast PRNG and here's a public domain PHP implementation for it:

http://kingfisher.nfshost.com/sw/twister/

That only works on PHP 5.3.0 and above.

回答2:

One of the best random number algorithms by some metrics is Mersenne Twister. You can find a pure PHP version here (there are others).

You can then call:

init_with_integer($integer_seed)

and get the same output (for a given seed) every time.

回答3:

This is not best one but it is a work one

function ranseed($min, $max, $seed) {
    return round($min + (hexdec(md5($seed)) / hexdec("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF")) * ($max - $min));
}