来自root用户的PHP，mkdir权限被拒绝

Question

Today I have encountered a strange behaviour which I do not understand.
I am trying to create a directory on the local disk using a PHP 7.0 script using mkdir() function but it produces a "permission denied" error.

In my experience (although very little) this always meant that the user which is executing the PHP script is not authorized to write to the directory. This makes sense to me and is usually not a problem when developing web applications . The default PHP user when using Apache is www-data and I don't encounter problems with it.

In this case though I am using Zend Framework 2 and in particular I am using it's console routes so I am not going through Apache (correct me if I am wrong). I am calling my script as:

php index.php route name [--options]

with my user (which is not root but is a sudoer ). The problems start if I output the result of PHP's get_current_user() function because I get 'root' instead of my expected user name. Not only this, but I get 'permission denied' when using mkdir() in the following directory:

drwxr-xr-x 2 www-data www-data 4096 Aug 19 21:21 logs

What I understand from this is that I probably am not the root user as PHP seems to suggest. If I then run the script with 'sudo' in front I am able to create the desired folders but the permissions do not match the ones I specify in my mkdir() function. If I write mkdir('path', 0777) I then get:

drwxr-xr-x 3 root root

This I do not understand. So, if someone could help me figure out what I am doing wrong I would be very thankful. Keep in mind that the fact that I am going through Zend Framework 2 might influence this behaviour (although I am not keen on thinking so).

Thank you in advance for your time.

Edit.

I just realized I didn't tell you what my final goal is so I will now put things in context, sorry.

What I am trying to do is to use this script (run either from root or from my user , preferably from my user ) to create these folders inside

/var/www

and to then be able to read and write files (and possibly other folders) to those directories whith the standard PHP user which in my case is www-data

Answer 1

your php runned as apache extension, and using apache permissions. If you need to create folder as root, you can create cron script for it, which will monitor change in some file, and create directory as root. Another way to do it, using suid extension, but it a bit complicated.