Php Script Problemo

[RockNRollPig]

okay..so here is the deal...i've got this program and part of it says to do this:

>//$tempdir = "/path/to/temp/dir/"; // needed for cache files. chmod 777 some dir.
$tempdir = "/temp";

 

so i did that i get this error:

 

Warning: fopen(/temp/cache.cac) [function.fopen]: failed to create stream: No such file or directory in /home/username/public_html/dir/file.php on line 38

 

now i know that that file and directory are there because im looking at them right now...anywho...suggestions anyone?