trying to make thumbnails upload connected with mysql (help plz)

[Darkwoods]

im trying to change my edit page where i upload my thumbnails..

 

what im trying do is when the image upload form/input is empty for example i dont want it to change because now when i try to edit only the text on the edit page and update it remove the file name from mysql table

 

and here where my problem is wan it to take the information from the file/input when i got somethingin it how do i do that?

<?php
include "../admin/inc/header.php";
$id = $_GET['id'];
if(isset($_POST['submit']))

  {  
      $bkname = $_POST['bkname'];
  $content = $_POST['content'];
  $thefile2=$_FILES['thefile']['name'];

		if(!$bkname){
                     echo "Error: Page Name is a required field. Please fill it.";
                     exit(); }					 

		if(!$thefile2){
		echo $row['thefile'];
				}

  	$result = mysql_query("UPDATE latest SET thefile='$thefile2', bkname='$bkname', content='$content' WHERE id='$id' ",$connect) or die(mysql_error());
        echo "<b>Successfully Edited</b>";
          // echo "<meta http-equiv=Refresh content=2;url=index.php>";
}
elseif($id)
{

        $result = mysql_query("SELECT * FROM latest WHERE id='$id' ",$connect) or die(mysql_error());
        while($row = mysql_fetch_assoc($result))
             {
                $bkname = $row['bkname'];
                $content = $row['content'];
			$thefile2 = $row['thefile'];
			 ?>
                

<form name='form1' method='post' action='<?php echo $_SERVER['PHP_SELF'] ?>?id=<?php echo $row['id']?>' enctype='multipart/form-data'>
<input type="hidden" name="id" value="<?php echo $row['id'];?>">

   
Book Name:		<input name="bkname" size="40" maxlength="255" value="<?php echo $bkname; ?>" /><br />
Book Info:		<textarea name="content"><?php echo $content; ?></textarea><br>
Select File:	<input type='file' name='thefile'><br>
    				<input type="hidden" name="thefile" value="<?php echo $row['thefile'];?>">
                    
				<input type='submit' name='submit' value='upload'><br /><br />
       <?php
	echo '<img src="../uploads/thumbs/thumb'. $row['thefile'] . '" hspace="5" vspace="5" align="left" />'; 
  } 



echo '</form>';
  

     $new_height=175;
     $new_width=175;

     $allowed_types = array( 
     'image/pjpeg', 
     'image/gif', 
     'image/png', 
     'image/jpeg'); 

     if(in_array($_FILES['thefile']['type'], $allowed_types)) 

     {
       copy ($_FILES['thefile']['tmp_name'], $_FILES['thefile']['name']) or die ("Could not copy");

       echo "Name: ".$_FILES['thefile']['name']."";
       echo "Size: ".$_FILES['thefile']['size']."";
       echo "Type: ".$_FILES['thefile']['type']."";  

       $imagefile=$_FILES['thefile']['name'];

       list($width, $height) = getimagesize($_FILES['thefile']['name']);
       $image_p = imagecreatetruecolor($new_width,$new_height);
   

       if ($_FILES['thefile']['type'] == "image/gif") 
       {
           $img = @imagecreatefromgif($imagefile);

           imagecopyresampled($image_p, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
           $thename=$_FILES['thefile']['name'];
           $thenames="thumb$thename";
           $location="thumbs/$thenames";
           imagegif($image_p,$location, 100);
       }
       else
       {

         $img = @imagecreatefromjpeg($imagefile);
         imagecopyresampled($image_p, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
         $thename=$_FILES['thefile']['name'];
         $thenames="thumb$thename";
         $location="thumbs/$thenames";
         imagejpeg($image_p,$location, 100);
       }
     }

     else

     {
       print "<br>Only Gifs and Jpegs are supported. Back to <A href='../admin/test.php'>Control Panel</a>";
     }
}

include "../admin/inc/footer.php";
  
?>

 

 

[Darkwoods]

i ment i want it to take information only when the file input is not empty and if it is empty i want it to keep the same data in the mysql table