do I have to pass a path in html request code example
Example 1: how do i set a pdf to be download link in html
<a href="./directory/yourfile.pdf" download="newfilename">Download the pdf</a>
Example 2: what Permissions do I need for include folder on php
Directories must have execute permissions to be usable;
Usually this is 0755.
PHP scripts run via mod_php are not executed but rather read;
0644 will suffice for this.