note 38107 deleted from function.rand by felipe

Note Submitter: jbarbero at u dot washington dot edu 

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to jordan at do not spam .com:

The image no-cache function is simpler if you just do:
<?
$junk = md5(time());
?>

Usage would be: <img src="image.gif?<?=$junk?>">

md5(time()) is more guaranteed to be unique, and it is faster than two md5 calls.