Edit preview website image

When you write a website on Facebook it will show a picture on the left side, which HTML code I have to edit in order to change this image?
This codice must be in the index.html file in the main folder of the website right?

 

You need to add some open graph meta tags

http://developers.facebook.com/docs/opengraph/objects/

be careful, facebook will cache your image, so if you want to change it later you will need to use cache bursting.

so edit the url from http://yoursite.com/index.php

to http://yoursite.com/index.php?1

 

Here is the code I use and it works perfectly with Facebook :

HTML:

<link rel="image_src" href="image.gif" />

Beny

 

Thank you very much both, Facebook cache the picture, you catched the problem!

My index is HTML and not PHP, it is fine anyway?

 

index.html?1

that will fix it, if you need to change it again, just change the value after the ?

index.html?anything