/**
* Called when the main execute function gets a 404 to check against old
* permalink structures and perform redirect if an old post can be
* matched.
*/
function redirect_old_permalink($req_uri)
{
global $wp_query, $wp_rewrite;
global $wp_version;
$rules = get_option('permalink_redirect_rules');
if (!$rules) {
return;
}
// Backing up the rewrite object for you, imperative programmers!
$wp_rewrite_old = $wp_rewrite;
// Unsetting the globals. Argh! Evil global variables!
foreach ($wp_query->query_vars as $key => $val) {
unset($GLOBALS[$key]);
}
// Going through the rules.
foreach ($rules as $rules2) {
$wp2 = new WP();
$wp_rewrite = new YLSY_Rewrite();
$wp_rewrite->index = $wp_rewrite_old->index;
$wp_rewrite->rules = $rules2;
$wp2->parse_request();
if (isset($wp2->query_vars['error']) && $wp2->query_vars['error'] == 404) {
continue;
}
$query = new WP_Query();
if ($wp_version >= '2.1') {
$posts = $query->query($wp2->query_vars);
} else {
$wp2->build_query_string();
$posts = $query->query($wp2->query_string);
}
if (count($posts) > 0) {
$wp_rewrite = $wp_rewrite_old;
$this->execute2($query, false);
return;
}
}
// Restoring global variables. We don't bother to reset the other
// variables as we are going to do a 404 anyway.
$wp_rewrite = $wp_rewrite_old;
}
