function _get_purchased_contents($post_types, $id, $start, $rows, $gifted = false)
 {
     global $wpdb;
     // array or string
     if (!is_array($post_types)) {
         $post_types = array($post_types);
     }
     // impode
     $post_types_in = mgm_map_for_in($post_types);
     // gifted
     $gifted_sql = $gifted ? "AND is_gift = 'Y'" : "AND is_gift = 'N'";
     // from
     $sql_from = " FROM " . $wpdb->posts . " A JOIN " . TBL_MGM_POST_PURCHASES . " B ON(A.ID = B.post_id) \r\r\n\t\t\t\t\t  WHERE post_status = 'publish' AND post_type IN ( {$post_types_in} ) {$gifted_sql}";
     // sql
     $sql = "SELECT DISTINCT(A.ID), post_type, post_title, post_date, post_content, user_id,guest_token {$sql_from} \r\r\n\t\t        ORDER BY post_date DESC LIMIT {$start},{$rows}";
     // get posts
     $results = $wpdb->get_results($sql);
     // init
     $posts = array();
     // check
     if ($results) {
         // loop
         foreach ($results as $post) {
             // get object
             $post_obj = mgm_get_post($post->ID);
             // check
             if (mgm_post_is_purchasable($post->ID, $post_obj)) {
                 // stip short code
                 $post->post_content = mgm_strip_shortcode($post->post_content);
                 // access type
                 $access_types = $post_obj->get_access_membership_types();
                 // access delay
                 $access_delays = $post_obj->get_access_delay();
                 // init
                 $access_settings = array();
                 // loop
                 foreach ($access_types as $access_type) {
                     // delay
                     $delay = isset($access_delays[$access_type]) ? (int) $access_delays[$access_type] : 0;
                     // set
                     $access_settings[] = array('membership_type' => array('code' => $access_type, 'name' => mgm_get_membership_type_name($access_type)), 'access_delay' => sprintf(__('%d day', 'mgm'), $delay));
                 }
                 // access
                 $post->access_settings = $access_settings;
                 // user
                 if ((int) $post->user_id > 0) {
                     // user
                     $user = get_userdata($post->user_id);
                     $user_info = array('by' => 'user', 'id' => $post->user_id, 'username' => $user->user_login, 'email' => $user->user_email);
                     // gifted
                     if ($gifted) {
                         $post->gift = array_slice($user_info, 1);
                     } else {
                         $post->purchase = $user_info;
                     }
                 } else {
                     $post->purchase = array('by' => 'guest', 'token' => $post->guest_token);
                 }
                 // unset
                 unset($post->guest_token, $post->user_id);
                 // set
                 $posts[] = $post;
             }
         }
     }
     // return
     return $posts;
 }
 /**
  * clean content
  */
 private function _clean_content($posts)
 {
     // init
     $_posts = array();
     // check
     if (count($posts) > 0) {
         // loop
         foreach ($posts as $id => $post) {
             // trim
             $post->post_content = mgm_strip_shortcode($post->post_content);
             // store
             $_posts[] = $post;
         }
     }
     // return
     return $_posts;
 }