gistfile1.txt

// Dit is fout, volgens mij.
$query = "UPDATE product SET (name, description, price, link, image) VALUES ('$_POST[name]', '$_POST[description]', '$_POST[price]', '$_POST[link]', '$product[image]') WHERE ID = '".$product['ID']."';";
// Zo doe ik het altijd:
$query = "
    UPDATE product
    SET 
        name = '".$_POST['name']."',
        description = '".$_POST['description']."',
        price = '".$_POST['price']."',
        link = '".$_POST['link']."',
        image = '".$target_path."'
    WHERE
        ID = '".$product['ID'].";
";