simple - edit image details in mysql

[generic]

Hi all, probably a super simple question here but what would be the best way to go about editing the image (as in, image name) in mysql - sort of...

Currently, this script will display current details and image for associated artists by artistid. I want to basically say if there's a new image uploaded, update the database with the new image, and if no image was uploaded (ie, $uploadedimage is empty), use the current image and do nothing to the image field.

I've included everything between the body tags so we don't miss anything. Thanks for viewing.

---edit_artist.php---

<?php
include("../config.php");

   if($submit)
  {

$target_path = "/var/www/html/artists/"; 
$target_path = $target_path . basename( $_FILES['uploadedfile']['name']); 

  if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)){ 
	echo "The file ". basename( $_FILES['uploadedfile']['name']). " has been uploaded<br>\n"; 
	chmod("$target_path", 0777);
	$image_entry = mysql_real_escape_string($_FILES['uploadedfile']['name']); 
	} 	  

  $bandname = mysql_real_escape_string($_POST['bandname']);
  $description = mysql_real_escape_string($_POST['description']);
  $website_url = mysql_real_escape_string($_POST['website_url']);

	 //add automatic line breaks
	 $description = ereg_replace(13,"<p>",$description); 

	//get ride of slashes
	$description = stripslashes($description);
	$bandname = stripslashes($bandname);

     $result = mysql_query("UPDATE artists SET bandname='$bandname', description='$description', website_url='$website_url', image_path='$image_entry' WHERE artistid='$artistid' ",$connect);

      echo "<b>Artist updated successfully!<br>You'll be redirected to the control panel after (4) seconds, or click <a href=\"index.php\">click here</a> to go there now.\n";
      echo "<meta http-equiv=Refresh content=4;url=index.php>";
}
elseif($artistid)
{

    $result = mysql_query("SELECT * FROM artists WHERE artistid='$artistid' ",$connect);
    while($myrow = mysql_fetch_assoc($result))
         {
            $bandname = $myrow["bandname"];
			$description = $myrow["description"];
			$website_url = $myrow["website_url"];
			$image_path = $myrow["image_path"];
?>
<br>
<h3>::Edit Artist</h3>

<form enctype="multipart/form-data" action="<?php echo $PHP_SELF ?>" method="POST">
  <p>Please be careful not to delete any line break or paragraph break tags shown as <strong>&lt;p&gt;</strong> or <strong>&lt;br&gt;</strong>.<br>
  These are paragraph formatting tags that have been dynamically generated by this software.</p>
  <p>
    <input type="hidden" name="artistid" value="<? echo $myrow['artistid']?>">

<p>Band Name:<br>
    <input name="bandname" size="40" maxlength="255" value="<?php echo $bandname; ?>">
	<br>
	<br>
  <p>Artist Image:<br>
    <br>
    <img src="../../artists/<?php echo $image_path; ?>" title="<?php echo $bandname; ?>">
	<br>
	<br>
	Image File (required):<br />
    <input name="uploadedfile" type="file" />
	<br>
    <br>
    Description:<br>
    <textarea name="description"  rows="7" cols="30"><?php echo $description; ?></textarea>
    <br>
    <br>
    Website URL: (with http://) <br>
    <input name="website_url" size="40" maxlength="255" value="<?php echo $website_url; ?>">
    <br>
    <br>
    <input type="submit" name="submit" value="Edit Artist >>">
    <br>
    <a href="index.php"><-- Go Back</a> </p>
  </p>
</form>
<?
              }//end of while loop

  }//end else
?>