[urga]

rtfm
* http://php.net/manual/en/function.tmpfile.php
* http://php.net/manual/en/function.fread.php
* http://php.net/manual/en/function.fwrite.php
* http://www.php.net/manual/en/function.rewind.php
* http://de2.php.net/manual/en/function.unlink.php
* http://de2.php.net/manual/en/function.fopen.php
* http://de2.php.net/manual/en/function.fclose.php

sag erstmal, ob der code für dich funzt....