title: PHP file_exists returns false with existing files
body: <p>I'm having a little problem with my PHP-code. I want to create a site which has different directories. Every directories has a file named pass (not .txt or something) with the value of the directories password. So if the pass-file doesn't exist the group will not exist. But even if the group exists it still says the group doesn't exist and I can't fopen the file either, but I can locate to it. Here's my code:<br></p>
  
  <pre><code>&lt;?php
  $name = $_POST['name'];
  $group = $_POST['group'];
  $pass = $_POST['pass'];
  $filename = '/groups/' . $group . '/pass';
  if(file_exists($filename)){
      $handle = fopen($filename) or die("can't open file");
      $hoi = fread($handle, filesize($filename));
      fclose($handle);
      if ($pass === $hoi){
          session_start();
          $_SESSION['name'] = $name;
          header('Location: http://www.google.com');
      }
      else{
          echo 'Password is wrong!';
      }
  }
  else{
      echo 'Group does not exist!';
  }
  ?&gt;
  </code></pre>
  
  <p>All POST-data is correct btw. Thanks for your help!</p>