editing time frame of this

ok, this code isplays a list of today posts. Useful for bloggers who publish multiple posts in a day.

Ok, I'm trying to tweak this so at the end of each week is has this instead, what do you guys think?

also, which would you edit? I was playing around withit before..

function cypher_todayposts($before = '<li>', $after = '</li>', $limit = 10) {

global $wpdb;

$date_format = get_settings('date_format');
$current_date = current_time('mysql');
$today = mysql2date($date_format, $current_date);
$ada = 0;

$output = $today . '<br />';

$request = "SELECT ID, post_title, post_date FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_date DESC LIMIT $limit";
$posts = $wpdb->get_results($request);
if($posts){
foreach ($posts as $post){
$post_title = stripslashes($post->post_title);
$permalink = get_permalink($post->ID);
$post_date = stripslashes($post->post_date);

$today_post = mysql2date($date_format, $post_date);

if( $today_post == $today ){
$output .= $before . '<a href="' . $permalink . '" rel="Bookmark" title="Permanent Link to ' . $post_title . '">' . $post_title . '</a>' . $after;
$ada = 1;
}
}
}

if( $ada == 0 )
$output .= $before . 'Sorry, currently there are no updates at this time.' . $after;

echo $output;
}
?>

 

done ......