[SOLVED] Files writable by PHP even though CHMOD is 555?

Issue

I've got a new server and when using my php script, I'm able to write files and detect them as being writable even though CHMOD has them as 555 or 755. Is there an apache module or php.ini that is making this possible? Is this a security problem?

Solution

What filesystem is your server/volume using?

Some filesystems use different permission schemes, like Access Control Lists in addition to or instead of Unix permissions. For example, you might be using AFS or OpenAFS (Andrew File System) which uses ACL's, in which case you'd have to enter a completely different command to change access. Ask your network administrator; they should be able to answer that. Or you can try running

df -T

to see what that gives you.

Answered By - Jeff

Answer Checked By - David Goodson (WPSolving Volunteer)