Uploading images using PHP

Hello,

The code at the bottom has been giving me a lot of trouble. All it does is upload the name of the image file into the database. I need it to upload the image file itself. Please help!

Thanks,
mbigrad

$sqlQuery = "SELECT * FROM motorcycles WHERE id = '$this->_id'";
$sqlServer->execQuery($sqlQuery);
$data = $sqlServer->getDataSetArray();

$this->_product_image_1 = $data["image_name_1"];
$this->_product_image_2 = $data["image_name_2"];
$this->_product_image_3 = $data["image_name_3"];
$this->_product_image_4 = $data["image_name_4"];
$this->_product_thumbnail = $data["thumbnail"];
             
             

$this->_product_image_dir = "http://www.mywebsite.com/images" . "/";

$filedir = $GLOBALS["base_imagedir"];
$file_name = "thumb_" . $_FILES['new_thumb']['name'];
if($_FILES['new_thumb']['name'] != '')
 {
 @unlink($filedir . $file_name);
$copy = copy($_FILES['new_thumb']['tmp_name'],$filedir . $file_name);
if($copy){
echo "$file_name | uploaded successfuly!<br>";
$real_path = realpath($uploads);
echo $real_path;
   }else{
echo "$file_name | could not be uploaded!<br>";
}      
 $this->_product_thumbnail = $file_name;
 }