generating unparalleled id php


i'm perplexing beget unparalleled id php method store user-uploaded calm fs but conflicts. i'm controlling php, during impulse small dash grateful generating uid:



$id = tempnam (".", "");
unlink($id);
$id = substr($id, 2);


this formula hideous: creates surrogate record fs deletes it, maintaining wholly applicable unparalleled biased generated string.



is there any improved proceed this, many preferably but any outmost dependencies?



thanks much!



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