Function redirect_canonical has a Cognitive Complexity of 160 (exceeds 5 allowed). Consider refactoring.

Open

function redirect_canonical($requested_url=null, $do_redirect=true) {
    global $wp_rewrite, $is_IIS, $wp_query, $wpdb;

    if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || $is_IIS || ( isset($_POST) && count($_POST) ) || is_preview() || is_robots() )
        return;

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Method redirect_canonical has 201 lines of code (exceeds 25 allowed). Consider refactoring.

Open

function redirect_canonical($requested_url=null, $do_redirect=true) {
    global $wp_rewrite, $is_IIS, $wp_query, $wpdb;

    if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || $is_IIS || ( isset($_POST) && count($_POST) ) || is_preview() || is_robots() )
        return;

Consider simplifying this complex logical expression.

Open

        if ( is_attachment() && !empty($_GET['attachment_id']) && ! $redirect_url ) {
            if ( $redirect_url = get_attachment_link(get_query_var('attachment_id')) )
                $redirect['query'] = remove_query_arg('attachment_id', $redirect['query']);
        } elseif ( is_single() && !empty($_GET['p']) && ! $redirect_url ) {
            if ( $redirect_url = get_permalink(get_query_var('p')) )

Consider simplifying this complex logical expression.

Open

    if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || $is_IIS || ( isset($_POST) && count($_POST) ) || is_preview() || is_robots() )
        return;

Avoid deeply nested control flow statements.

Open

                    if ( $paged > 1 && !is_single() ) {
                        $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit("page/$paged", 'paged');
                    } elseif ( !is_single() ) {
                        $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit($paged_redirect['path'], 'paged');
                    }

Consider simplifying this complex logical expression.

Open

    if ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() && !is_404() && (!is_front_page() || ( is_front_page() && (get_query_var('paged') > 1) ) ) ) {
        $user_ts_type = '';
        if ( get_query_var('paged') > 0 ) {
            $user_ts_type = 'paged';
        } else {

Avoid too many return statements within this method.

Open

        return $redirect_url;

Avoid too many return statements within this method.

Open

            return false;