PHP delete_post_thumbnail函数代码示例

 /**
  * Save the new field data for the nav menu.
  *
  * @param $menu_id
  * @param $menu_item_db_id
  * @param $args
  */
 public function update_nav_fields($menu_id, $menu_item_db_id, $args)
 {
     // Hide on mobile.
     if (isset($_POST['hide-menu-on-mobile'][$menu_item_db_id])) {
         update_post_meta($menu_item_db_id, 'hide_menu_on_mobile', empty($_POST['hide-menu-on-mobile'][$menu_item_db_id]) ? false : 'on');
     } else {
         delete_post_meta($menu_item_db_id, 'hide_menu_on_mobile');
     }
     // Image.
     if (isset($_POST['menu-item-image']) && is_array($_POST['menu-item-image'])) {
         if (!isset($_POST['menu-item-image'][$menu_item_db_id]) || !$_POST['menu-item-image'][$menu_item_db_id]) {
             delete_post_thumbnail($menu_item_db_id);
         }
         if (isset($_POST['menu-item-image'][$menu_item_db_id])) {
             set_post_thumbnail($menu_item_db_id, absint($_POST['menu-item-image'][$menu_item_db_id]));
         }
     }
     if (isset($_POST['menu-item-icon']) && is_array($_POST['menu-item-icon'])) {
         if (isset($_POST['menu-item-icon'][$menu_item_db_id])) {
             update_post_meta($menu_item_db_id, '_menu_item_icon', sanitize_text_field($_POST['menu-item-icon'][$menu_item_db_id]));
         }
     }
     if (isset($_POST['menu-item-widget-area']) && isset($_POST['menu-item-widget-area'][$menu_item_db_id]) && is_array($_POST['menu-item-widget-area'])) {
         update_post_meta($menu_item_db_id, '_menu_item_widget_area', sanitize_text_field($_POST['menu-item-widget-area'][$menu_item_db_id]));
     }
 }

/**
 * Delete attachments linked to a specified post
 * @param int $parent_id Parent id of post to delete attachments for
 */
function wp_delete_attachments($parent_id, $unlink = true, $type = 'images')
{
    if ($type == 'images' and has_post_thumbnail($parent_id)) {
        delete_post_thumbnail($parent_id);
    }
    $ids = array();
    $attachments = get_posts(array('post_parent' => $parent_id, 'post_type' => 'attachment', 'numberposts' => -1, 'post_status' => null));
    foreach ($attachments as $attach) {
        if ($type == 'files' and !wp_attachment_is_image($attach->ID)) {
            if ($unlink) {
                wp_delete_attachment($attach->ID, true);
            } else {
                $ids[] = $attach->ID;
            }
        } elseif ($type == 'images' and wp_attachment_is_image($attach->ID)) {
            if ($unlink) {
                wp_delete_attachment($attach->ID, true);
            } else {
                $ids[] = $attach->ID;
            }
        }
    }
    global $wpdb;
    if (!empty($ids)) {
        $ids_string = implode(',', $ids);
        // unattach
        $result = $wpdb->query("UPDATE {$wpdb->posts} SET post_parent = 0 WHERE post_type = 'attachment' AND ID IN ( {$ids_string} )");
        foreach ($ids as $att_id) {
            clean_attachment_cache($att_id);
        }
    }
    return $ids;
}

 /**
  *  Delete the post thumbnail when deleted from front end
  *
  * @since 0.1
  *
  * @param array $data Sanitized data to use for saving.
  *
  * @return bool Always returns true.
  */
 public function delete($data)
 {
     $postid = isset($data['postid']) ? $data['postid'] : false;
     delete_post_thumbnail($postid);
     do_action('lasso_featured_image_deleted', $postid, get_current_user_ID());
     return true;
 }

function mc_event_post($action, $data, $event_id)
{
    // if the event save was successful.
    if ($action == 'add' || $action == 'copy') {
        $post_id = mc_create_event_post($data, $event_id);
    } else {
        if ($action == 'edit') {
            if (isset($_POST['event_post']) && ($_POST['event_post'] == 0 || $_POST['event_post'] == '')) {
                $post_id = mc_create_event_post($data, $event_id);
            } else {
                $post_id = $_POST['event_post'];
            }
            // If, after all that, the post doesn't exist, create it.
            if (!get_post_status($post_id)) {
                mc_create_event_post($data, $event_id);
            }
            $term = mc_get_category_detail($data['event_category'], 'category_term');
            if (!$term) {
                $term = wp_insert_term('General', 'mc-event-category');
                $term = !is_wp_error($term) ? $term['term_id'] : false;
                if ($term) {
                    $update = mc_update_category('category_term', $term, $data['event_category']);
                }
            }
            $privacy = mc_get_category_detail($data['event_category'], 'category_private') == 1 ? 'private' : 'publish';
            $title = $data['event_title'];
            $template = apply_filters('mc_post_template', 'details', $term);
            $data['shortcode'] = "[my_calendar_event event='{$event_id}' template='{$template}' list='']";
            $description = $data['event_desc'];
            $excerpt = $data['event_short'];
            $post_status = $privacy;
            $auth = $data['event_author'];
            $type = 'mc-events';
            $my_post = array('ID' => $post_id, 'post_title' => $title, 'post_content' => $description, 'post_status' => $post_status, 'post_author' => $auth, 'post_name' => sanitize_title($title), 'post_date' => date('Y-m-d H:i:s', current_time('timestamp')), 'post_type' => $type, 'post_excerpt' => $excerpt);
            if (mc_switch_sites() && defined(BLOG_ID_CURRENT_SITE)) {
                switch_to_blog(BLOG_ID_CURRENT_SITE);
            }
            $post_id = wp_update_post($my_post);
            wp_set_object_terms($post_id, (int) $term, 'mc-event-category');
            if ($data['event_image'] == '') {
                delete_post_thumbnail($post_id);
            } else {
                $attachment_id = isset($_POST['event_image_id']) && is_numeric($_POST['event_image_id']) ? $_POST['event_image_id'] : false;
                if ($attachment_id) {
                    set_post_thumbnail($post_id, $attachment_id);
                }
            }
            $access = isset($_POST['events_access']) ? $_POST['events_access'] : array();
            $access_terms = implode(',', array_values($access));
            mc_update_event('event_access', $access_terms, $event_id, '%s');
            do_action('mc_update_event_post', $post_id, $_POST, $data, $event_id);
            if (mc_switch_sites()) {
                restore_current_blog();
            }
        }
    }
    return $post_id;
}

 /**
  * When menu item removed remove menu image metadata.
  */
 public function delete_menu_item_image_action()
 {
     $menu_item_id = (int) $_REQUEST['menu-item'];
     check_admin_referer('delete-menu_item_image_' . $menu_item_id);
     if (is_nav_menu_item($menu_item_id) && has_post_thumbnail($menu_item_id)) {
         delete_post_thumbnail($menu_item_id);
         delete_post_meta($menu_item_id, 'menu_item_icon');
         delete_post_meta($menu_item_id, 'menu-item-bg-img');
     }
 }

/**
 *
 */
function erm_update_menu_item()
{
    //echo '<pre>'; print_r( $_POST ); echo '</pre>'; exit();
    if (isset($_POST['post_id'])) {
        $post_id = absint($_POST['post_id']);
        wp_update_post(array('ID' => $post_id, 'post_title' => $_POST['title'], 'post_name' => $_POST['title'], 'post_content' => $_POST['content']));
        update_post_meta($post_id, '_erm_visible', $_POST['visible'] == 'true' ? true : false);
        update_post_meta($post_id, '_erm_prices', $_POST['prices']);
        $image_id = absint($_POST['image_id']);
        if ($image_id != 0) {
            set_post_thumbnail($post_id, $image_id);
        } else {
            delete_post_thumbnail($post_id);
        }
        wp_send_json_success();
    }
    exit;
}

/**
 * Delete attachments linked to a specified post
 * @param int $parent_id Parent id of post to delete attachments for
 */
function wp_delete_attachments($parent_id, $unlink = true, $type = '')
{
    if ($type == 'images' and has_post_thumbnail($parent_id)) {
        delete_post_thumbnail($parent_id);
    }
    foreach (get_posts(array('post_parent' => $parent_id, 'post_type' => 'attachment', 'numberposts' => -1, 'post_status' => null)) as $attach) {
        if ($type == 'files' and !wp_attachment_is_image($attach->ID)) {
            wp_delete_attachment($attach->ID, true);
        } elseif ($type == 'images' and wp_attachment_is_image($attach->ID) or "" == $type) {
            if ($unlink or !wp_attachment_is_image($attach->ID)) {
                wp_delete_attachment($attach->ID, true);
            } else {
                global $wpdb;
                $sql = "delete a,b,c\n\t\t\t\t\tFROM " . $wpdb->posts . " a\n\t\t\t\t\tLEFT JOIN " . $wpdb->term_relationships . " b ON ( a.ID = b.object_id )\n\t\t\t\t\tLEFT JOIN " . $wpdb->postmeta . " c ON ( a.ID = c.post_id )\n\t\t\t\t\tLEFT JOIN " . $wpdb->posts . " d ON ( a.ID = d.post_parent )\n\t\t\t\t\tWHERE a.ID = " . $attach->ID . ";";
                $wpdb->query($wpdb->prepare($sql, ''));
            }
        }
    }
}

 public final function set_banner_image()
 {
     $post_ID = intval($_POST['post_id']);
     if (!current_user_can('edit_post', $post_ID)) {
         wp_die(-1);
     }
     $banner_id = intval($_POST['banner_id']);
     check_ajax_referer("update-post_{$post_ID}");
     if ($banner_id == '-1') {
         if (delete_post_thumbnail($post_ID)) {
             wp_send_json_success('');
         } else {
             wp_die(0);
         }
     }
     $course = \Ekko\Core\CoursePostType::singleton()->get_course($post_ID);
     if (set_post_thumbnail($course->ID, $banner_id)) {
         wp_send_json_success($this->banner_thumbnail_html($course));
     }
     wp_die(0);
 }

 private function update_post_thumbnail($post_id, $reserved_post_thumb_path)
 {
     include_once ABSPATH . 'wp-admin/includes/image.php';
     $upload_dir = wp_upload_dir();
     $image_data = file_get_contents($reserved_post_thumb_path);
     $file_name = basename($reserved_post_thumb_path);
     if (wp_mkdir_p($upload_dir['path'])) {
         $file = $upload_dir['path'] . '/' . $file_name;
     } else {
         $file = $upload_dir['basedir'] . '/' . $file_name;
     }
     file_put_contents($file, $image_data);
     $wp_file_type = wp_check_filetype($file_name, null);
     $attachment = array('post_mime_type' => $wp_file_type['type'], 'post_title' => sanitize_file_name($file_name), 'post_content' => '', 'post_status' => 'inherit');
     delete_post_thumbnail($post_id);
     $attachment_id = wp_insert_attachment($attachment, $file, $post_id);
     $attach_data = wp_generate_attachment_metadata($attachment_id, $file);
     if (!empty($attach_data) && !is_wp_error($attach_data)) {
         $res = wp_update_attachment_metadata($attachment_id, $attach_data);
         set_post_thumbnail($post_id, $attachment_id);
         return $res;
     }
 }

 public static function deletePostPicture($postId)
 {
     delete_post_thumbnail($postId);
 }

 /**
  * Update item thumbnail via ajax action.
  *
  * @since 2.0
  */
 public function wp_ajax_set_menu_item_thumbnail()
 {
     $json = !empty($_REQUEST['json']);
     $post_ID = intval($_POST['post_id']);
     if (!current_user_can('edit_post', $post_ID)) {
         wp_die(-1);
     }
     $thumbnail_id = intval($_POST['thumbnail_id']);
     $is_hovered = (bool) $_POST['is_hover'];
     check_ajax_referer("update-menu-item");
     if ($thumbnail_id == '-1') {
         if ($is_hovered) {
             $success = delete_post_meta($post_ID, '_thumbnail_hover_id');
         } else {
             $success = delete_post_thumbnail($post_ID);
         }
     } else {
         if ($is_hovered) {
             $success = update_post_meta($post_ID, '_thumbnail_hover_id', $thumbnail_id);
         } else {
             $success = set_post_thumbnail($post_ID, $thumbnail_id);
         }
     }
     if ($success) {
         $return = $this->wp_post_thumbnail_only_html($post_ID);
         $json ? wp_send_json_success($return) : wp_die($return);
     }
     wp_die(0);
 }

 public static function update_post_meta($meta_vars, $post_id)
 {
     // prepare the meta vars
     list($meta_key_value, $multi_repeated, $files) = self::prepare_meta_fields($meta_vars);
     // set featured image if there's any
     // if not in admin or if in admin (but doing an ajax call)
     if (is_admin() && defined('DOING_AJAX') && DOING_AJAX || !is_admin()) {
         if (isset($_POST['feat-image-id']) && $_POST['feat-image-id'] != 0) {
             $attachment_id = $_POST['feat-image-id'];
             fes_associate_attachment($attachment_id, $post_id);
             set_post_thumbnail($post_id, $attachment_id);
         }
         if (!isset($_POST['feat-image-id']) || $_POST['feat-image-id'] == 0) {
             delete_post_thumbnail($post_id);
         }
     }
     // save all custom fields
     foreach ($meta_key_value as $meta_key => $meta_value) {
         update_post_meta($post_id, $meta_key, $meta_value);
     }
     // save any multicolumn repeatable fields
     foreach ($multi_repeated as $repeat_key => $repeat_value) {
         // first, delete any previous repeatable fields
         delete_post_meta($post_id, $repeat_key);
         // now add them
         foreach ($repeat_value as $repeat_field) {
             update_post_meta($post_id, $repeat_key, $repeat_field);
         }
     }
     // save any files attached
     foreach ($files as $file_input) {
         if (!isset($_POST[$file_input['name']])) {
             continue;
         }
         $ids = array();
         // We need to detach all previously attached files for this field. See #559
         $old_files = get_post_meta($post_id, $file_input['name'], true);
         if (!empty($old_files) && is_array($old_files)) {
             foreach ($old_files as $file_id) {
                 global $wpdb;
                 $wpdb->update($wpdb->posts, array('post_parent' => 0), array('ID' => $file_id), array('%d'), array('%d'));
             }
         }
         foreach ($_POST[$file_input['name']] as $file => $url) {
             if (empty($url)) {
                 continue;
             }
             $author_id = 0;
             if (!current_user_can('manage_shop_settings')) {
                 $author_id = get_post_field('post_author', $post_id);
             }
             $attachment_id = fes_get_attachment_id_from_url($url, $author_id);
             fes_associate_attachment($attachment_id, $post_id);
             $ids[] = $attachment_id;
         }
         update_post_meta($post_id, $file_input['name'], $ids);
     }
 }

/**
 * Handles updating an idea
 *
 * @package WP Idea Stream
 * @subpackage ideas/functions
 *
 * @since 2.0.0
 *
 * @uses   check_admin_referer() to check the request has been done from current site
 * @uses   wp_idea_stream_get_redirect_url() to get default redirect url
 * @uses   get_query_var() to get the value of a specific query var
 * @uses   wp_idea_stream_get_post_type() to get the ideas post type identifier
 * @uses   get_queried_object() to try to get the idea object WordPress built
 * @uses   wp_idea_stream_ideas_get_idea_by_name() to get an idea object out of its post name
 * @uses   wp_idea_stream_user_can() to check user's capability
 * @uses   wp_idea_stream_add_message() to add a feddback message to user
 * @uses   wp_safe_redirect() to safely redirect the user and avoid duplicates
 * @uses   wp_idea_stream_ideas_save_idea() to save the idea
 * @uses   wp_idea_stream_get_form_url() to get the add new form url
 * @uses   wp_idea_stream_ideas_get_idea_permalink() to get the idea link
 */
function wp_idea_stream_ideas_update_idea()
{
    global $wp_query;
    // Bail if not a post request
    if ('POST' != strtoupper($_SERVER['REQUEST_METHOD'])) {
        return;
    }
    // Bail if not a post idea request
    if (empty($_POST['wp_idea_stream']) || !is_array($_POST['wp_idea_stream'])) {
        return;
    }
    // Bail if it's not an update
    if (empty($_POST['wp_idea_stream']['_the_id'])) {
        return;
    }
    // Check nonce
    check_admin_referer('wp_idea_stream_save');
    $redirect = wp_idea_stream_get_redirect_url();
    // Get idea name
    $idea_name = get_query_var(wp_idea_stream_get_post_type());
    // Get Idea Object
    $idea = get_queried_object();
    // If queried object doesn't match or wasn't helpfull, try to get the idea using core function
    if (empty($idea->post_name) || empty($idea_name) || $idea_name != $idea->post_name) {
        $idea = wp_idea_stream_ideas_get_idea_by_name($idea_name);
    }
    // Found no idea, redirect and inform the user
    if (empty($idea->ID)) {
        wp_idea_stream_add_message(array('type' => 'error', 'content' => __('The idea you are trying to edit does not seem to exist.', 'wp-idea-stream')));
        // Redirect to main archive page
        wp_safe_redirect($redirect);
        exit;
    }
    // Checks if the user can edit the idea
    if (!wp_idea_stream_ideas_can_edit($idea)) {
        // Add feedback to the user
        wp_idea_stream_add_message(array('type' => 'error', 'content' => __('You are not allowed to edit this idea.', 'wp-idea-stream')));
        // Redirect to main archive page
        wp_safe_redirect($redirect);
        exit;
    }
    $updated = array_diff_key($_POST['wp_idea_stream'], array('save' => 'submit'));
    // Title & content are required
    if (empty($updated['_the_title']) || empty($updated['_the_content'])) {
        // Add feedback to the user
        wp_idea_stream_add_message(array('type' => 'error', 'content' => __('Title and description are required fields.', 'wp-idea-stream')));
        // Simply stop, so that the user keeps the posted values.
        return;
    }
    // Reset '_the_id' param to the ID of the idea found
    $updated['_the_id'] = $idea->ID;
    $feedback_message = array();
    $featured_error = __('There was a problem saving the featured image, sorry.', 'wp-idea-stream');
    $featured_type = 'info';
    // Take care of the featured image
    $thumbnail_id = (int) get_post_thumbnail_id($idea);
    if (!empty($updated['_the_thumbnail'])) {
        $thumbnail_src = key($updated['_the_thumbnail']);
        $thumbnail = reset($updated['_the_thumbnail']);
        // Update the Featured image
        if (!is_numeric($thumbnail) || $thumbnail_id !== (int) $thumbnail) {
            if (is_numeric($thumbnail)) {
                // validate the attachment
                if (!get_post($thumbnail)) {
                    $feedback_message[] = $featured_error;
                    // Set the new Featured image
                } else {
                    set_post_thumbnail($idea->ID, $thumbnail);
                }
            } else {
                $sideload = WP_Idea_Stream_Ideas_Thumbnail::start($thumbnail_src, $idea->ID);
                if (is_wp_error($sideload->result)) {
                    $feedback_message[] = $featured_error;
                }
            }
        }
        // Delete the featured image
    } elseif (!empty($thumbnail_id)) {
        delete_post_thumbnail($idea);
//.........这里部分代码省略.........

 /**
  * Process an MLA_List_Table custom bulk action
  *
  * Creates new items from the "Bulk Translate" list.
  *
  * @since 2.13
  *
  * @param	array	$item_content	NULL, to indicate no handler.
  * @param	string	$bulk_action	the requested action.
  * @param	integer	$post_id		the affected attachment.
  *
  * @return	object	updated $item_content. NULL if no handler, otherwise
  *					( 'message' => error or status message(s), 'body' => '' )
  */
 public static function mla_list_table_custom_bulk_action($item_content, $bulk_action, $post_id)
 {
     if (self::MLA_GFI_ACTION != $bulk_action) {
         return $item_content;
     }
     /* translators: 1: post ID */
     $item_prefix = sprintf(__('Item %1$d', 'media-library-assistant'), $post_id) . ', ';
     /*
      * If there is a real thumbnail image, no generation is required or allowed
      */
     $thumbnail = wp_get_attachment_image($post_id);
     if (!empty($thumbnail)) {
         return array('message' => $item_prefix . __('has native thumbnail.', 'media-library-assistant'));
     }
     /*
      * Look for the "Featured Image" as an alternate thumbnail for PDFs, etc.
      */
     $thumbnail = get_post_thumbnail_id($post_id);
     if (!empty($thumbnail)) {
         switch (self::$bulk_action_options['existing_thumbnails']) {
             case 'ignore':
                 break;
             case 'trash':
                 delete_post_thumbnail($post_id);
                 wp_delete_post(absint($thumbnail), false);
                 break;
             case 'delete':
                 delete_post_thumbnail($post_id);
                 wp_delete_post(absint($thumbnail), true);
                 break;
             case 'keep':
             default:
                 return array('message' => $item_prefix . __('Featured Image retained.', 'media-library-assistant'));
         }
     }
     /*
      * Validate the file existance and type
      */
     $file = get_attached_file($post_id);
     if (empty($file)) {
         /* translators: 1: ERROR tag 2: Item post ID */
         return array('message' => sprintf(__('%1$s: %2$sno attached file.', 'media-library-assistant'), __('ERROR', 'media-library-assistant'), $item_prefix));
     }
     if (!in_array(strtolower(pathinfo($file, PATHINFO_EXTENSION)), array('ai', 'eps', 'pdf', 'ps'))) {
         return array('message' => $item_prefix . __('unsupported file type.', 'media-library-assistant'));
     }
     /*
      * Generate a thumbnail
      */
     require_once MLA_PLUGIN_PATH . 'includes/class-mla-image-processor.php';
     $results = MLAImageProcessor::mla_handle_thumbnail_sideload($file, self::$bulk_action_options);
     if (!empty($results['error'])) {
         /* translators: 1: ERROR tag 2: Item post ID */
         return array('message' => sprintf(__('%1$s: %2$sthumbnail generation failed', 'media-library-assistant'), __('ERROR', 'media-library-assistant'), $item_prefix) . ' - ' . $results['error']);
     }
     /*
      * Adjust the file name for the new item
      */
     $pathinfo = pathinfo($results['name']);
     if (isset(self::$bulk_action_options['suffix'])) {
         $pathinfo['filename'] = sanitize_file_name($pathinfo['filename'] . strtolower(self::$bulk_action_options['suffix']));
     }
     $pathinfo['extension'] = 'image/jpeg' == $results['type'] ? 'jpg' : 'png';
     $results['name'] = $pathinfo['filename'] . '.' . $pathinfo['extension'];
     $overrides = array('test_form' => false, 'test_size' => true, 'test_upload' => true);
     // move the temporary file into the uploads directory
     $results = wp_handle_sideload($results, $overrides);
     $item_data = get_post($post_id, ARRAY_A);
     unset($item_data['ID']);
     unset($item_data['post_author']);
     unset($item_data['post_date']);
     unset($item_data['post_date_gmt']);
     if (isset(self::$bulk_action_options['suffix'])) {
         $item_data['post_title'] .= self::$bulk_action_options['suffix'];
     }
     unset($item_data['post_name']);
     unset($item_data['post_modified']);
     unset($item_data['post_modified_gmt']);
     $item_parent = $item_data['post_parent'];
     unset($item_data['post_parent']);
     $item_data['guid'] = $results['url'];
     $item_data['post_mime_type'] = $results['type'];
     unset($item_data['comment_count']);
     unset($item_data['ancestors']);
     unset($item_data['post_category']);
     unset($item_data['tags_input']);
//.........这里部分代码省略.........

function wp_ajax_set_post_thumbnail()
{
    $post_ID = intval($_POST['post_id']);
    if (!current_user_can('edit_post', $post_ID)) {
        wp_die(-1);
    }
    $thumbnail_id = intval($_POST['thumbnail_id']);
    check_ajax_referer("set_post_thumbnail-{$post_ID}");
    if ($thumbnail_id == '-1') {
        if (delete_post_thumbnail($post_ID)) {
            wp_die(_wp_post_thumbnail_html(null, $post_ID));
        } else {
            wp_die(0);
        }
    }
    if (set_post_thumbnail($post_ID, $thumbnail_id)) {
        wp_die(_wp_post_thumbnail_html($thumbnail_id, $post_ID));
    }
    wp_die(0);
}