title: I'm getting "is a directory" error when trying unlink directory
body: <p>I'm trying to create a function which will run periodically to delete any old "user" folders which don't have an active user. This is the function I have:</p>
  
  <pre><code>function delete_temp_user_files() {
      $dir = $_SERVER['DOCUMENT_ROOT'] . "/users/";
      $dir_files = array();
      $dir_files = scandir($dir);
      foreach ($dir_files as $username) {
          if ($username == "." || $username == "..") continue;
          if (!user_exist($username)) {
              $dir1 = $_SERVER['DOCUMENT_ROOT'] . "/users/" . $username;
              if (!is_dir($dir1)) continue;
              if (file_exists($dir1)) unlink($dir1);
          }
      }
  }
  </code></pre>
  
  <p>But when it tries to delete the directory I get the error "Warning: unlink(/path/to/users/delete1/): Is a directory in /page.php on line..." I know the directory exists because I can see it in the directory, and it found it using scandir() anyway. </p>
  
  <p>I use unlink to delete these same folders in other scripts and it works fine. The directories aren't empty so I can't user rmdir().</p>
  
  <p>I'm not familiar with permissions or anything like that, is this some kind of issue with that? And do I need to worry about permissions if I only ever use PHP scripts to delete files and folders (like when the user clicks on the delete button which runs the script I wrote)?</p>
  
  <p>UPDATE:</p>
  
  <p>After scouring the web I finally found how to delete a directory and it's not easy lol Add this function into the previous function and it works!</p>
  
  <pre><code>function delete_dir($directory) {
      foreach(glob("{$directory}/*") as $file)
      {
          if(is_dir($file)) { 
              delete_dir($file);
          } else {
              unlink($file);
          }
      }
      rmdir($directory);
  }
  </code></pre>