Adding Footer Widget Sidebar to this Functio php script?

Hi – this is my second thread started for this as no-one was able to offer any ideas before…hoping anyone can kindly advise here..

<?php
if ( function_exists(‘register_sidebar’) )
register_sidebar(array(
‘before_widget’ => ‘<li id=”%1$s” class=”widget %2$s”>’,
‘after_widget’ => ”,
‘before_title’ => ‘<h2 class=”widgettitle”>’,
‘after_title’ => ‘</h2>’,
));
?>

This is my function php code.

I’ve tried many variations of code so I can add a wigdets to the footer – or a footer widget sidebar.

Can anyone please advise of how I change this so I don’t get syntax and parse errors each time.

Thanks if you can help.