Deleting a Facebook Post from a Page with $facebook->api

Question

I am having trouble deleting a facebook post from my web app. Now I know the Facebook documentation and other SO posts say to do this:

You can delete objects in the graph by issuing HTTP DELETE requests to 
the object URLs, i.e,

DELETE https://graph.facebook.com/ID?access_token=... HTTP/1.1

But since Im such a noob, I dont fully understand the short explanation of deleting with an HTTP request. Since it did not work when I tried, I assume that simply redirecting to the formed url in the example above does not delete anything. This means theres some new area of web development that I now have to understand... HTTP requests.

How are these done in php? The php manual isnt helping much either.

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Additional Information:

I have tried many different variations of:

$facebook->api($post_url, 'DELETE', array('method'=> 'delete') );

The URL I am passing is '/post_id'. The post_id is being captured at post creation and stored into the database. This id matched the $_GET['story_fbid'] that can be found on any post permalink. Perhaps this is not the correct id? I am retrieving the id with the following:

//post to wall
$postResult = $facebook->api($post_url, 'post', $msg_body );
//capture the id of the post
$this->fb_post_id = $postResult['id'];

When I run the code above, no errors are thrown. It is being touched because a diagnostic echo after it is running.

These are the different combinations of strings I have passed to api with $post_url:

/postid                  api returns true, nothing is deleted from Facebook
/userid_postid           api returns false, Error: (#100) Invalid parameter
/postid_userid           api returns false, Error: (#1705) : Selected wall post for deletion does not exist
/accesstoken_postid      api returns false, Error: (#803) Some of the aliases you requested do not exist 
/postid_accestoken       api returns false, Error: (#803) Some of the aliases you requested do not exist

Answer 1

This should work:

$facebook->api("/YOUR_POST_ID","DELETE");

will return a boolean value, true if successed and false if failed.

Try prepending userid to the object ID when deleting, like:

$facebook->api("/USER-ID_YOUR-POST-ID","DELETE");

like:

$facebook->api("/12345132_5645465465454","DELETE");
//where 12345132 is fb userid and
//5645465465454 is object id --> post id