我需要在wordpress中以编程方式插入帖子。。我已完成插入标题和内容。。但图像未上载和附加。。你能给我提个建议吗。。

$post_id = wp_insert_post(
      array(
        \'post_author\'   => $user->ID,
            \'post_title\'    => $Title,
            \'post_content\'   =>$Content,
            \'post_status\'   => \'publish\',
            \'post_type\'   => \'post\',
            \'guid\'      =>      $site_url . \'/?p=\' . $post_id
      )
    );


$Featured_image = http://ecx.images-amazon.com/images/I/51l-rEon-NL._SL110_.jpg;
$year = date("Y");   
$month = date("m"); 
$url = \'/wp-content/uploads/\'. $year . \'/\' . $month . \'/\'  . basename($Featured_image);

// Check the type of file. We\'ll use this as the \'post_mime_type\'.
$filetype = wp_check_filetype( basename( $Featured_image ), null );

// Get the path to the upload directory.
$wp_upload_dir = wp_upload_dir();

// Prepare an array of post data for the attachment.
$attachment = array(
\'guid\'           => $wp_upload_dir[\'url\'] . \'/\' . basename( $Featured_image ), 
\'post_mime_type\' => $filetype[\'type\'],
\'post_title\'     => preg_replace( \'/\\.[^.]+$/\', \'\', basename( $Featured_image )),
\'post_content\'   => \'\',
\'post_status\'    => \'inherit\',
\'post_type\' => \'attachment\'
);

// Insert the attachment.

$attach_id = wp_insert_attachment( $attachment,  $year . \'/\' . $month . \'/\'  . basename($Featured_image) ,  $post_id );

require_once( ABSPATH . \'wp-admin/includes/image.php\' );

$attach_data = wp_generate_attachment_metadata( $attach_id, $url );

wp_update_attachment_metadata( $attach_id, $attach_data );

set_post_thumbnail( $post_id, $attach_id );

我试过了，但图像显示在这样的媒体上，

同时，图像未存储在uploads文件夹中。。我不知道如何解决这个问题。。有人能推荐我吗。。