how to get url attachment is posted

Greetings,

You can either use WP_Query to retrieve the attachments just like you can query posts you can read more about it here. I also have a convenience method wpba_get_attachments() you can read more about it here.

You can get the link to an attachment fairly easily. You can use wp_get_attachment_url() if you are looking to get the path to the file you can read more here. You can also use get_attachment_link() if you want a link to the attachment page you can read more about it here.

Hope this helps please let me know if you need anything else.

Thanks,
Dan