سوال: ویجت در وردپرس

/* CLEAN PHP TAG AND PASTE BELOWS CODES TO THE FUNCTIONS.PHP */
/* Creating the widget */
class wpb_widget extends WP_Widget {
function __construct() {
parent::__construct(
// Base ID of your widget
'wpb_widget', 
// Widget name will appear in UI
__('Popular Posts', 'wpb_widget_domain'), 
// Widget description
array( 'description' => __( 'Popular Posts', 'wpb_widget_domain' ), ) 
);
}
// Creating widget front-end
// This is where the action happens
public function widget( $args, $instance ) {
$title = apply_filters( 'widget_title', $instance['title'] );
// before and after widget arguments are defined by themes
echo $args['before_widget'];
if ( ! empty( $title ) )
echo $args['before_title'] . $title . $args['after_title'];
// This is where you run the code and display the output
echo __( 'Hello, World!', 'wpb_widget_domain' );
echo $args['after_widget'];
}
// Widget Backend 
public function form( $instance ) {
if ( isset( $instance[ 'title' ] ) ) {
$title = $instance[ 'title' ];
}
else {
$title = __( 'New title', 'wpb_widget_domain' );
}
// Widget admin form
?>


    }
// Updating widget replacing old instances with new
public function update( $new_instance, $old_instance ) {
$instance = array();
$instance['title'] = ( ! empty( $new_instance['title'] ) ) ? strip_tags( $new_instance['title'] ) : '';
return $instance;
}
}
// Class wpb_widget ends here
// Register and load the widget
function wpb_load_widget() {
register_widget( 'wpb_widget' );
}
add_action( 'widgets_init', 'wpb_load_widget' );

حالا سوال اینه که من چطور می تونم کد زیر رو (کد آخرین پست ها) به جای "Hello, World!" جایگزین کنم:

// Define our WP Query Parameters


// Start our WP Query
 have_posts()) : $the_query -> the_post(); ?>

// Display the Post Title with Hyperlink
""></span>

// Display the Post Excerpt


// Repeat the process and reset once it hits the limit