if image path exists donot overwrite

[bluns]

Hi guys i have a form to modify an existing article, which includes and upload form to upload images. If the user updates the article without updating the image the image path stored in the mysql database is made null

heres how my script works

upload image via form saves to webserver while sending the path to the image in mysql

Anyways

  //ensure image is not deleted if modified with null
  if(!isset($_FILES['picture1']['name']))
  {
  $query = "select picture1path from cardata where id=$id";
  $result = mysql_query($query); 
  $row = mysql_fetch_object($result);
  $picture1_name=$row->picture1path;
  }
  else
  {
//check picture1 MIME type 
if (!in_array($picture1_type, array('image/gif', 'image/jpeg', 'image/pjpeg', 'image/png', 'image/x-png'))) 

and it continues with image formatting etc...

This still does not fix my problem, i can upload an existing image, but if i leave the upload form blank so does the value picture1_name

Any ideas?

Thanks

[bluns]

anyone?

I think all i need to know is what should be used instead of

if(!isset($_FILES['picture1']['name']))

ie if nothing was inputted, then use information already stored in database