Facebook php publish_actions and iframe

I'm developing a web app with Phonegap. I have 2 questions: the first is how can I publish a post in users wall with PHP in PHP SDK4. I have searched and tried a lot of things from the internet but nothing works.

The question 2 is, I've got a page that contains a <a href> that link to a Facebook specific event for example : http://ift.tt/1FXcm08 I need to show this, the best thing is to show it in Facebook app, i tried to modify my link as it : fb://event/(fbid) -> fb://event/446553802160942 or -> fb://event/(446553802160942),but it opens only Facebook app, not in the specific event.

Then, I thought about to put the event link in another page that I can close, but the following code doesn't work.. :

<iframe src="http://ift.tt/1FXcm08"></iframe>

I'm not binded to php, I could use javascript too if necessary .