我正在从url获取帖子id，如下所示

https://www.example.com/download/?id=241

在这个id的基础上，我想从db获取post数据，但它什么都没有得到，我尝试了这个代码

  <?php
$id = $_GET[\'id\'];
// WP_Query arguments
$args = array (
    \'category_name\'          => \'download\',
    \'showposts\'              => \'1\',
    \'post_id\'    => $id,
  \'post_type\' => \'page\'
);

// The Query
$my_query = new WP_Query( $args );
//print_r($my_query);
  if ($my_query->have_posts() ) : while ($my_query->have_posts() ) : $my_query->the_post();  // Start the loop
    $thumb_id = get_post_thumbnail_id();
    $thumb_url = wp_get_attachment_image_src($thumb_id, true);
?>

                                 <a href="<?php the_permalink() ?>" title="<?php the_title(); ?>" target="_blank">
                                    <img src="<?php echo $thumb_url[0]; ?>"  />
                                    <h3><?php the_title(); ?></h3>
                                    <time>تاريخ النشر: <?php the_time(\'l, F j, Y\'); ?></time>
                                </a>                                    

            <?php
               endwhile; endif;// End the Loop and Check for Posts
               wp_reset_query(); // Reset the loop
             ?>

所以我想通过使用id 我正在通过url。所以请告诉我我的代码能做什么

$id = $_GET[\'id\'];

global $post;
echo $post->ID;

get_post($id);

$id = $_GET[\'id\']; // get the ID from the URL

$post_data = get_post($id); // get post object

var_dump($post_data);

$args = array (
    \'post_type\'          => \'download\', //use post_type instead since downloads is a post type not a taxonomy 
    \'posts_per_page\'              => \'1\',
    \'post_id\'    => $id,
);