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(); |
Note: Since PHP 4.2.0 it's no longer necessary to seed the random number generator before using it.
See also mt_rand(), mt_getrandmax() and srand().