unlink error? (VB install on localhost)

[TECK]

i get an unlink error when i run the VB install on my pc. basically the unlink command deletes a file from the hard disk. so the code below:if (file_exists($path)!=0) {
unlink($path);
}it's looking for the $path, (not defined, i think..) on the Apache server. the config.php file is edited. i attached below a pic, so you can see better.
do i have to add something extra to the Apache config? thanks for your help.

NOTE: to see my (successfull ;)) PHP+Apache Server install details, please read this thread:
https://vborg.vbsupport.ru/showthread.php?s=&threadid=35407

[Admin]

I also get that error whenever installing vBulletin locally... using IIS though. Couldn't care less about this TBH.

[TECK]

thanks firefly. just wanted to make sure.