mt_srand

(3.0.6 - 3.0.18 only, PHP 4 >= 4.0.0)

mt_srand -- Seed the better random number generator

Description

void mt_srand (int seed)

Seeds the random number generator with seed.

// seed with microseconds
function make_seed() {
    list($usec, $sec) = explode(' ', microtime());
    return (float) $sec + ((float) $usec * 100000);
}
mt_srand(make_seed());
$randval = mt_rand();

See also mt_rand(), mt_getrandmax(), srand(), rand(), and getrandmax().