I am very new to Facebook Graph API. Now I am developing a PHP e-commerce website that needs to integrate with Facebook. What I need to do is a user creates a product from admin panel. After the product is already created. The product will be shared on Facebook fan page.
But we do not have to share the link. We want to change the content on the Facebook fan page. So user input message for Facebook post then the product will be shared on Facebook page. I know how to share message, but I do not know how to share photo of created product just by using url. The image will be shown as post picture of Facebook page.
Now I am passing parameters like this to Facebook Graph API:
url : https//graph.facebook/{page-id}/feed?message={message}&access_token={access_token}
How can I share the photo as post picture as well by just using url of created product? I know that the "link" parameter is not useful.