PHP file within a folder

it was like this

ROOT: index.html (form is there) php folder (php files there)

the folder is in the same root.
regardless if it did work I would need my other content within the ‘php’ folder
thats why it would not get any style. but thanks anyways guys. im trying a different approach.
I have all the php files in my root folder now and I deleted ‘php’ folder.

now its like this:

ROOT: index.html (form location), php files