title: get all file names from a directory in php
body: <p>(Well what I gone through a lot of posts here on stackoverflow and other sites. I need a simple task, )</p>
  
  <p>I want to provide my user facility to click on upload file from his account, then select a directory and get the list of all the files names inside that directory.</p>
  
  <p>According to the posts here what I got is I have to pre-define the directory name, which I want to avoid.</p>
  
  <p>Is there a simple way to click a directory and get all the files names in an array in PHP? many thanks in advance!</p>
  
  <pre><code>  $dir = isset($_POST['uploadFile']) ? _SERVER['DOCUMENT_ROOT'].'/'.$_POST['uploadFile'] : null;
    if ($_POST['uploadFile'] == true) 
      {
       foreach (glob($dir."/*.mp3") as $filename) {
       echo $filename;
      }
    }
  </code></pre>