Shortcode to display related posts

gistfile1.txt

/*
*  Woo Related Posts Slider Shortcode
*/
 
 function woo_related_posts_slider($atts) {
    global $post;
 
    extract( shortcode_atts( array(
        'tags' => 'true',
        'cats' => 'true',
        'link_title' => 'true',
        'limit' => '6',
        'overlay' => 'full',
        'layout' => 'text-bottom'
    ), $atts ) );
 
    if( is_single() ) {
    
        $extra_args = array();
        if($tags == 'true') {
            $terms_tags = get_the_terms( $post->ID, 'post_tag' );
            $count = 0;
            if ( !empty( $terms_tags ) ) {
                $extra_args['tag'] = '';
                foreach( $terms_tags as $k => $v) {
                    $count++;
                    if ( $count > 1 ) {
                        $extra_args['tag'] .= '+';
                    }
                    $extra_args['tag'] .= esc_attr($v->slug);
                }
            }
        }
            
        if($cats == 'true') {
            $terms_categories = get_the_terms( $post->ID, 'category' );
            $count = 0;
            if ( !empty( $terms_categories ) ) {
                $extra_args['category'] = '';
                foreach ( $terms_categories as $k => $v ) {
                    $count++;
                    if ( $count > 1 ) {
                        $extra_args['category'] .= ',';
                    }
                    $extra_args['category'] .= esc_attr( $v->slug );
                }
            }
        }
 
        $extra_args['link_title'] = $link_title;
        $extra_args['limit'] = $limit;
        $extra_args['overlay'] = $overlay;
        $extra_args['layout'] = $layout;
            
        wooslider( array( 'slider_type' => 'posts', 'smoothheight' => 'true', 'randomize' => 'true' ), $extra_args );
    } 
}
 
add_shortcode('related_slider', 'woo_related_posts_slider' );