I tried:
$args = array( \'access_token\' => $access_token, \'id\' => $uid ); $url = \"https://graph.facebook.com/{$idPhoto}/tags\"; $ch = curl_in
Change the url to
$url = "https://graph.facebook.com/{$idPhoto}/photos";
tags is not a compatible method! use photo to retrieve the specified data
tags
photo
Take a look at!
http://developers.facebook.com/docs/reference/api/photo for tagging users in photos.