Wordpress - ポストエディタに添付されているが、ポストエディタに表示されていない画像があります

Question

私は自分のポストタイプを 'portfolio'にしていて、そのサービスを使って毎日更新したいwordpress.orgスクリプトの実行後

http://s.wordpress.com/mshots/v1/' . urlencode($site) . '?w=' . $width; 

で私は、メディアライブラリ内の画像を見つけ、彼らはポストに添付しているように見えるが、私はポストをチェックすると任意の機能を備えた画像と、画像がありませんフロントエンドには表示されません。 私が使用しているスクリプトをここに掲載します。誰かが私を助けてくれることを願っています。

<?php 
function ss_screenshot_action($post_id){ 
    $width = 612; 
    $site = trim(get_post_meta($post_id, 'site_url', true)); 

    if ($site != ''){ 
     $query_url = 'http://s.wordpress.com/mshots/v1/' . urlencode($site) . '?w=' . $width; 

     $imagename= str_replace('%2F','',str_replace('.','-', substr(substr(basename($query_url), 13), 0, -6))). '.jpg'; 
     $save_path = ABSPATH.'wp-content/uploads/site_snapshots/'; 
     $save_img_path = ABSPATH.'wp-content/uploads/site_snapshots/'.$imagename; 

     // first time, the image doesn't exist 
     if(!file_exists($save_img_path)) { 
      $image = getimg($query_url); 
      file_put_contents($save_img_path, $image); 
      //is the image bigger than 10KB? (cicle and wait for the image to be generated) 
      while (filesize($save_img_path) < 10000) { 
       unlink($save_img_path); 
       sleep(1); 
       $image = getimg($query_url); 
       file_put_contents($save_img_path, $image); 
      } 
      //insert the attachment 
      saveSiteImg($save_img_path); 
     } 

     //if the image exist and it is older than a day, take it again and change only the image for the attachment - 1day = 86400 = 24*3600 seconds 
     if(file_exists($save_img_path) && get_post_thumbnail_id($post_id) != 0 && (time() - filemtime($save_img_path)) > 86400) {   
      $image = getimg($query_url); 
      file_put_contents($save_img_path, $image); 
      while (filesize($save_img_path) < 10000) { 
       unlink($save_img_path); 
       sleep(1); 
       $image = getimg($query_url); 
       file_put_contents($save_img_path, $image); 
      } 
      //maybe here I have to update the metadata for the attachment and to regenerate the thumbnails 
     } 
    } 
} 
add_action('save_post', 'ss_screenshot_action'); 

function getimg($url) {   
    $headers[] = 'Accept: image/jpeg';    
    $headers[] = 'Connection: Keep-Alive';   
    $headers[] = 'Content-type: application/x-www-form-urlencoded;charset=UTF-8';   
    $user_agent = 'php';   
    $process = curl_init($url);   
    curl_setopt($process, CURLOPT_HTTPHEADER, $headers);   
    curl_setopt($process, CURLOPT_HEADER, 0); 
    //Required for http(s) 
    curl_setopt($process, CURLOPT_SSL_VERIFYHOST, false); 
    curl_setopt($process, CURLOPT_SSL_VERIFYPEER, false); 
    // 
    curl_setopt($process, CURLOPT_USERAGENT, $user_agent);   
    //curl_setopt($process, CURLOPT_TIMEOUT, 30);   
    curl_setopt($process, CURLOPT_RETURNTRANSFER, 1);   
    curl_setopt($process, CURLOPT_FOLLOWLOCATION, 1); 
    curl_setopt($process, CURLOPT_BINARYTRANSFER,1); 
    $return = curl_exec($process);   
    curl_close($process);   
    return $return;  
} 

function saveSiteImg($filename) { 
    // $filename should be the path to a file in the upload directory. 
    global $post; 
    // The ID of the post this attachment is for. 
    $parent_post_id = $post->ID; 

    // Check the type of file. We'll use this as the 'post_mime_type'. 
    $filetype = wp_check_filetype(basename($filename), 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'   => $wp_upload_dir['url'] . '/' . basename($filename), 
     'post_mime_type' => $filetype['type'], 
     'post_title'  => preg_replace('/\.[^.]+$/', '', basename($filename)), 
     'post_content' => '', 
     'post_status' => 'inherit' 
    ); 

    // Insert the attachment. 
    $attach_id = wp_insert_attachment($attachment, $filename, $parent_post_id); 

    // Make sure that this file is included, as wp_generate_attachment_metadata() depends on it. 
    require_once(ABSPATH . 'wp-admin/includes/image.php'); 

    // Generate the metadata for the attachment, and update the database record. 
    $attach_data = wp_generate_attachment_metadata($attach_id, $filename); 
    wp_update_attachment_metadata($attach_id, $attach_data); 

    set_post_thumbnail($parent_post_id, $attach_id); 
} 

EDIT 1 私はカスタムポストタイプ宣言するところ以下の通りです：

function create_portfolio() { 
    $labels = array(
     'name'    => __('Portfolio' , 'portfolio-plugin'), 
     'singular_name'  => __('Portfolio' , 'portfolio-plugin'), 
     'add_new'   => __('Aggiungi testata', 'portfolio-plugin'), 
     'add_new_item'  => __('Aggiungi nuova testata' , 'portfolio-plugin'), 
     'edit_item'   => __('Modifica testata', 'portfolio-plugin'), 
     'new_item'   => __('Nuova testata', 'portfolio-plugin'), 
     'all_items'   => __('Tutte le testate', 'portfolio-plugin'), 
     'view_item'   => __('Vedi le testate' , 'portfolio-plugin'), 
     'search_items'  => __('Cerca testata' , 'portfolio-plugin'), 
     'not_found'   => __('Nessuna testata inserita', 'portfolio-plugin'), 
     'not_found_in_trash' => __('Work Not found in the trash', 'portfolio-plugin'), 
    ); 

    $args = array(
     'labels'    => $labels, 
     'public'    => true, 
     'rewrite'   => array('slug' => 'portfolio'), 
     'has_archive'  => true, 
     'hierarchical'  => true, 
     'menu_position'  => 22, 
     'menu_icon'   => 'dashicons-welcome-write-blog', 
     'supports'   => array(
           'title', 
           'editor', 
           'thumbnail', 
           'excerpt', 
           'page-attributes' 
           ), 

    ); 

    register_post_type('portfolio', $args); 
} 

Answer 1

register_post_typeを使用して、パラメータをサポートしています。

'supports' => array('thumbnail') 

https://codex.wordpress.org/Function_Reference/register_post_type

register_post_type($post_type, $args);