Extension:Add Metas

What can this extension do?
This extension enables you to add meta tags on all the pages, like meta keywords

It's based on the Extension:Emoticons and Extension:MetaKeywordsTag

Usage
Just enable the require_once in LocalSettings

Installation
Just look and edit the souce, im not a PHP developer, feel free to make changes or sugestions.

Problems
This can appear:

Warning: Cannot modify header information - headers already sent by (output started at /home/quintena/domains/jetairflyvirtual.com/public_html/wikipedia/extensions/AddMetas.php:43) in /home/quintena/domains/jetairflyvirtual.com/public_html/wikipedia/includes/WebResponse.php on line 16

What to do? -> under construction