<?php
  $uploaddir = './uploads/';
$allowed   = array('jpg','jpeg','gif','pdf');
$max_size  = 1024 mb 1024;

# No edits beyond this line
if (isset($_FILES['userfile'])) {
   foreach ($_FILES['userfile']['error'] as $i => $error) {
     if ($error == 0 && $_FILES['userfile']['size'][$i] <= $max_size) {
       $file_ext  = pathinfo($_FILES['userfile']['name'][$i],PATHINFO_EXTENSION);
       $file_name = basename($_FILES['userfile']['name'][$i],'.'.$file_ext);
       if (in_array(strtolower($file_ext),$allowed)) {
         $new_base = $_FILES['userfile']['name'][$i];
         $t = 1;
         while (file_exists($uploaddir.$new_base)) {
           $new_base = $file_name.'['.$t.'].'.$file_ext;
           $t++;
         }
         if (move_uploaded_file($_FILES['userfile']['tmp_name'][$i],$uploaddir.$new_base)) {
           chmod($uploaddir.$new_base, 0644);
           echo 'Successful upload: '.$_FILES['userfile']['name'][$i].'<br>'."\n";
         }
       }
     }
   }
}
?></div>
</body>
</html>

<form name="Upload" method="post" action="upload_plus.php" enctype="multipart/form-data" id="Form1">
<input type="file" id="FileUpload1" style="position:absolute;left:277px;top:325px;width:333px;height:24px;z-index:0" size="25" name="userfile[]">
<input type="image" name="Upload" id="ImageButton1" src="images/buttonupload.jpg" style="position:absolute;left:515px;top:360px;width:80px;height:27px;z-index:1">
<input type="image" name="Upload" id="ImageButton1" src="images/foldery.png" style="position:absolute;left:240px;top:321px;width:33px;height:27px;z-index:2">
</form>