wp

 function the_titlesmall($before = '', $after = '', $echo = true, $length = false) { $title = get_the_title();

if ( $length && is_numeric($length) ) {
$title = substr( $title, 0, $length );
}

if ( strlen($title)> 0 ) {
$title = apply_filters('the_titlesmall', $before . $title . $after, $before, $after);
if ( $echo )
echo $title;
else
return $title;
}
}



function custom_excerpt_length( $length ) {
        return 20;
    }
    add_filter( 'excerpt_length', 'custom_excerpt_length', 999 );

function cf7_add_post_id(){

    global $post;
    return $post->ID;
}

add_shortcode('CF7_ADD_POST_ID', 'cf7_add_post_id');