Facebook publish stream directly using PHP
//Note that you will need to have the access token which is what gives permission to write.
 function self_fb_post($to_uid,$acToken) {
    global $fb; //this is the fb object
    $result = false;
    $feed_dir = '/'.$to_uid.'/feed/';  //to the UID you want to send to
    $message_str =  'Why does facebook development not have decent support';
    $msg_body = array('access_token' => $acToken,
                  'name' => 'My wall post',
                  'message' => $message_str,
                  'caption' => "www.mysite.com",
                  'link' => 'http://www.mysite.com',
                  'description' => 'A wall post which is used to express the frustration of working with crappy facebook developer documentation',
                  'picture' => 'http://farm6.static.flickr.com/1111/some-pic.jpg',
                  'actions' => array(array('name' => 'My Site',
                              'link' => 'http://www.mysite.com'))
                  );

try {
            //this is the API call that does it all
    $result = $fb->api($feed_dir, 'post', $msg_body);
}
catch (Exception $e) {
    $err_str = $e->getMessage();
}


     return $result;
}

$facebook = new Facebook(array(
'appId' => 'YOUR_APP_ID',
'secret' => 'YOUR_SECRET_KEY',
'cookie' => true,
'domain' => 'www.softwareandfinance.com'
));

$permissions = $facebook->api("/me/permissions");
    if(! array_key_exists('publish_stream', $permissions['data'][0]) ) {
        header( "Location: " . $facebook->getLoginUrl(array("scope" =>
            "publish_stream")) );
    }