remove srand calls

http://php.net/manual/en/function.srand.php
"Note: As of PHP 4.2.0, there is no need to seed the random number
generator with srand() or mt_srand() as this is now done automatically."

also: the automatic solution in php is more random and less predictable then microtime


and, I dont think you need to initialize the random number generator for every iteration of foreach, it does not get more random