Discussion on the use of PHP functions mt_srand

Description of the PHP function mt_srand

Void mt_srand (int seed)

Seed is used to seeding the random number generator. Starting from PHP 4.2.0, the seed parameter becomes optional. When this item is null, it is set to the number at any time.

Example 1. Example of the PHP function mt_srand

1. <? Php
2. // Seed with microseconds
3. Function make_seed ()
4. {
5. List ($ usec, $ sec) = explode
   ('', Microtime ());
6. Return (float) $ sec +
   (Float) $ usec * 100000 );
7. }
8. Mt_srand (make_seed ());
9. $ Randval = mt_rand ();
10. ?>

Note: As of PHP 4.2.0, the random number generator is no longer needed to be planted using srand () or the PHP function mt_srand, which is now automatically completed.
See mt_rand (), mt_getrandmax () and srand ().