title: PHP can't read file with read permissions
body: <p>I have a file with these permissions (0644)</p>
  
  <pre><code>-rw-r--r-- 1 root root
  </code></pre>
  
  <p>So from my understanding this file should be readable by anyone.</p>
  
  <p>Now I have this code:</p>
  
  <pre><code>file_get_contents('/path/to/file');
  </code></pre>
  
  <p>And it is giving me this</p>
  
  <blockquote>
    <p>Warning: file_get_contents(...): failed to open stream: Permission denied in ...</p>
  </blockquote>
  
  <p>What am I missing?</p>
  
  <p>I'm running it from a web server under <code>www-data</code>.</p>