PHP wp_delete_attachment函数代码示例

 private function removeAttachments($post)
 {
     $attachments = get_posts(array('post_type' => 'attachment', 'posts_per_page' => -1, 'post_parent' => $post->ID));
     foreach ($attachments as $attachment) {
         wp_delete_attachment($attachment->ID, true);
     }
 }

 public function deleteImage($image_id, $post_id, $meta_key = false)
 {
     wp_delete_attachment($image_id, false);
     if ($meta_key) {
         delete_post_meta($post_id, $meta_key, $image_id);
     }
 }

 /**
  * Main edit post form
  *
  * @global type $wpdb
  * @global type $userdata
  */
 function prepare_form()
 {
     global $wpdb, $userdata;
     $post_id = isset($_GET['pid']) ? intval($_GET['pid']) : 0;
     //is editing enabled?
     if (wpuf_get_option('enable_post_edit', 'yes') != 'yes') {
         return __('Post Editing is disabled', 'wpuf');
     }
     $curpost = get_post($post_id);
     if (!$curpost) {
         return __('Invalid post', 'wpuf');
     }
     //has permission?
     if (!current_user_can('delete_others_posts') && $userdata->ID != $curpost->post_author) {
         return __('You are not allowed to edit', 'wpuf');
     }
     //perform delete attachment action
     if (isset($_REQUEST['action']) && $_REQUEST['action'] == "del") {
         check_admin_referer('wpuf_attach_del');
         $attach_id = intval($_REQUEST['attach_id']);
         if ($attach_id) {
             wp_delete_attachment($attach_id);
         }
     }
     //process post
     if (isset($_POST['wpuf_edit_post_submit']) && wp_verify_nonce($_REQUEST['_wpnonce'], 'wpuf-edit-post')) {
         $this->submit_post();
     }
     //show post form
     $this->edit_form($curpost);
 }

/**
 * Cron - Thumbnail extraction
 */
function wp_rp_upload_attachment($url, $post_id)
{
    /* Parts copied from wp-admin/includes/media.php:media_sideload_image */
    include_once ABSPATH . 'wp-admin/includes/file.php';
    include_once ABSPATH . 'wp-admin/includes/media.php';
    include_once ABSPATH . 'wp-admin/includes/image.php';
    $tmp = download_url($url);
    preg_match('/[^\\?]+\\.(jpe?g|jpe|gif|png)\\b/i', $url, $matches);
    $file_array['name'] = sanitize_file_name(urldecode(basename($matches[0])));
    $file_array['tmp_name'] = $tmp;
    if (is_wp_error($tmp)) {
        @unlink($file_array['tmp_name']);
        return false;
    }
    $post_data = array('guid' => $url, 'post_title' => 'rp_' . $file_array['name']);
    $attachment_id = media_handle_sideload($file_array, $post_id, null, $post_data);
    if (is_wp_error($attachment_id)) {
        @unlink($file_array['tmp_name']);
        return false;
    }
    $attach_data = wp_get_attachment_metadata($attachment_id);
    $platform_options = wp_rp_get_platform_options();
    $min_width = $platform_options['custom_size_thumbnail_enabled'] ? WP_RP_CUSTOM_THUMBNAILS_WIDTH : WP_RP_THUMBNAILS_WIDTH;
    $min_height = $platform_options['custom_size_thumbnail_enabled'] ? WP_RP_CUSTOM_THUMBNAILS_HEIGHT : WP_RP_THUMBNAILS_HEIGHT;
    if (!$attach_data || $attach_data['width'] < $min_width || $attach_data['height'] < $min_height) {
        wp_delete_attachment($attachment_id);
        return false;
    }
    return $attachment_id;
}

 function delete_images_permanently($entries)
 {
     $meta_key = WPPG_ATTACHMENT_META_TAG;
     $errors = '';
     if (is_array($entries)) {
         //Remove multiple images from gallery
         foreach ($entries as $entry) {
             $result = wp_delete_attachment($entry, true);
             if ($result == NULL) {
                 $errors .= '<p><strong>' . sprintf(__('The deletion of attachment with image ID %s failed!', 'spgallery'), $entry) . '</strong></p>';
             }
         }
     } elseif ($entries != NULL) {
         //Remove a single image from the gallery
         $result = wp_delete_attachment($entries, true);
         if ($result == NULL) {
             $errors .= '<p><strong>' . sprintf(__('The deletion of attachment with image ID %s failed!', 'spgallery'), $entries) . '</strong></p>';
         }
     }
     if ($errors == '') {
         $success_msg = '<div id="message" class="updated fade"><p><strong>';
         $success_msg .= __('The selected images were successfully deleted from the system permanently!', 'spgallery');
         $success_msg .= '</strong></p></div>';
         _e($success_msg);
     } else {
         $error_msg = '<div id="message" class="error">';
         $error_msg .= $errors;
         $error_msg .= '</div>';
     }
 }

 public function delete_attachment()
 {
     global $json_api;
     if (!current_user_can('upload_files') && !current_user_can('delete_posts')) {
         $json_api->error("You do not have permission to delete files.");
     }
     //$json_api->error("Test 1 You do not have permission to delete files.");
     //return null;
     $nonce_id = $json_api->get_nonce_id('attachments', 'update_attachment');
     if (!wp_verify_nonce($json_api->query->nonce, $nonce_id)) {
         //$json_api->error("Your 'nonce' value was incorrect. Use the 'get_nonce' API method.");
     }
     $id = $json_api->query->id !== null;
     if ($json_api->query->id !== null) {
         $id = (int) $json_api->query->id;
     } else {
         $json_api->error("Include 'id' or 'slug' var in your request.");
     }
     $force_delete = true;
     if ($json_api->query->force_delete !== null) {
         $force_delete = (bool) $json_api->query->force_delete;
     }
     $result = wp_delete_attachment($id, $force_delete);
     if ($result) {
         $successful = true;
     } else {
         $successful = false;
     }
     $result = array('post' => $result, 'deleted' => (bool) $successful);
     return $result;
 }

/**
 * 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;
}

function expirator_callback()
{
    //get_post_meta( $attachment_id, '_time_to_left', true );
    global $post;
    $args = array('post_type' => 'attachment', 'post_status' => 'inherit', 'posts_per_page' => -1);
    $loop = new WP_Query($args);
    $output = "";
    while ($loop->have_posts()) {
        $loop->the_post();
        $today = date("Y-m-d");
        $today = strtotime($today);
        $picker = get_post_meta($post->ID, '_time_to_left', true);
        $picker = strtotime($picker);
        if ($picker != '') {
            $output .= 'process ' . $post->ID . ' >> ' . $today . ':' . $picker . '</br>';
            if ($today >= $picker) {
                $output .= 'this true - remove it</br>';
                wp_delete_attachment($post->ID, true);
            }
            $output .= '</br></br>';
        }
    }
    //send mail about expiration status
    //wp_mail( 'example@gmail.com', 'expirator', $output );
}

 /**
  * Delete all wordpress attachments
  * for a particular post.
  *
  * @param null $postId
  *
  * @return array
  */
 public function deleteAttachments($postId = NULL)
 {
     // Data must be sent
     if (is_null($postId)) {
         return 'Must provide post ID to delete attachments.';
     }
     // Init a results array
     $results = array();
     // Get attachments
     $attachments = get_posts(array('post_type' => 'attachment', 'posts_per_page' => -1, 'post_status' => 'any', 'post_parent' => $postId));
     // Loop through attachments
     foreach ($attachments as $attachment) {
         // Delete this attachment.
         $result = wp_delete_attachment($attachment->ID, true);
         // If deletion was successful...
         if ($result) {
             // Add id to success array.
             $results[] = $attachment->ID;
         } else {
             // Warn the user...
             echo "Warning! : Attachment could not be deleted: " . $attachment->ID;
         }
     }
     // Return results.
     return $results;
 }

 /**
 		@brief		threewp_broadcast_apply_existing_attachment_action
 		@since		2015-11-16 14:10:32
 	**/
 public function threewp_broadcast_apply_existing_attachment_action($action)
 {
     if ($action->is_finished()) {
         return;
     }
     $bcd = $action->broadcasting_data;
     switch ($action->action) {
         case 'overwrite':
             // Delete the existing attachment
             $this->debug('Maybe copy attachment: Deleting current attachment %s', $action->target_attachment->ID);
             wp_delete_attachment($action->target_attachment->ID, true);
             // true = Don't go to trash
             // Tell BC to copy the attachment.
             $action->use = false;
             break;
         case 'randomize':
             $filename = $bcd->attachment_data->filename_base;
             $filename = preg_replace('/(.*)\\./', '\\1_' . rand(1000000, 9999999) . '.', $filename);
             $bcd->attachment_data->filename_base = $filename;
             $this->debug('Maybe copy attachment: Randomizing new attachment filename to %s.', $bcd->attachment_data->filename_base);
             // Tell BC to copy the attachment.
             $action->use = false;
             break;
     }
 }

 /**
  * Tear down the test fixture.
  */
 public function tearDown()
 {
     // Cleanup
     foreach ($this->_ids as $id) {
         wp_delete_attachment($id, true);
     }
     parent::tearDown();
 }

      /**
       * [delet_attachment write data from wordpress to CSV]
       * @param  [type] $post_id [description]
       * @return [type]          [description]
       */
      public function delete_attachment( $post ) {
        global $wpdb;

        //$ids = $wpdb->get_col("SELECT ID FROM {$wpdb->posts} WHERE post_parent = $post_id AND post_type = 'attachment'");
        $ids = $wpdb->get_col("SELECT ID FROM {$wpdb->posts} WHERE post_type = 'attachment'");
        foreach ( $ids as $id )
          wp_delete_attachment($id);
      }

 public function import_roles()
 {
     if (!$this->can_import()) {
         $this->main->permission_denied();
         return;
     }
     if (!extension_loaded('simplexml')) {
         echo '<div class="error"><p>' . $this->__('This functionality requires SimpleXML extension, which is not loaded.') . '</p></div>';
         return;
     }
     if (!empty($_POST['submit'])) {
         check_admin_referer('import-upload');
         set_time_limit(0);
         if ($this->handle_upload()) {
             $this->roles_data = array();
             global $wp_roles;
             foreach ($this->import_data->roles as $role) {
                 $this->roles_data[$role->name] = (object) array('display_name' => $role->display_name, 'override' => FALSE);
                 if (get_role($role->name) !== NULL) {
                     $this->roles_data[$role->name]->override = TRUE;
                 }
             }
         }
     }
     if (!empty($_POST['importroles'])) {
         $this->main->verify_nonce();
         set_time_limit(0);
         if (!empty($_POST['file-id'])) {
             $this->file_id = $_POST['file-id'];
             $this->parse_contents(get_attached_file($this->file_id));
             if (is_wp_error($this->import_data)) {
                 $this->result = (object) array('success' => FALSE, 'message' => $this->import_data->get_error_message());
                 $this->import_data = NULL;
             } else {
                 $this->roles_data = array();
                 if (!empty($_POST['import-roles'])) {
                     $this->roles_data = $_POST['import-roles'];
                     if (!is_array($this->roles_data)) {
                         $this->roles_data = array();
                     }
                 }
                 foreach ($this->import_data->roles as $role) {
                     if (array_key_exists($role->name, $this->roles_data)) {
                         if (get_role($role->name) === NULL) {
                             add_role($role->name, $role->display_name, $role->capabilities);
                         } else {
                             WPFront_User_Role_Editor_Add_Edit::update_role($role->name, $role->display_name, $role->capabilities);
                         }
                     }
                 }
                 $this->result = (object) array('success' => TRUE, 'message' => sprintf($this->__('%d role(s) imported.'), count($this->roles_data)));
                 $this->import_data = NULL;
             }
             wp_delete_attachment($this->file_id);
         }
     }
     include $this->main->pluginDIR() . 'templates/personal-pro/import-roles.php';
 }

function tzs_delete_auction_callback()
{
    $id = isset($_POST['id']) && is_numeric($_POST['id']) ? intval($_POST['id']) : 0;
    $is_delete = isset($_POST['is_delete']) && is_numeric($_POST['is_delete']) ? intval($_POST['is_delete']) : 0;
    $user_id = get_current_user_id();
    $errors = array();
    if ($id <= 0) {
        echo "Номер не найден";
    } else {
        if ($user_id == 0) {
            echo "Вход в систему обязателен";
        } else {
            global $wpdb;
            // Добавить проверку наличия ставок - если есть ставки, то удаление невозможно
            $sql = "SELECT COUNT(*) as cnt FROM " . TZS_AUCTION_RATES_TABLE . " WHERE auction_id = {$id}";
            $row = $wpdb->get_row($sql);
            if (count($row) === 0 && $wpdb->last_error != null) {
                echo 'Не удалось отобразить информацию о ставках по тендеру. Свяжитесь, пожалуйста, с администрацией сайта.';
                echo $wpdb->last_error;
            } else {
                if ($row === null) {
                    echo 'Ставки по тендеру не найдены.';
                } else {
                    if ($row->cnt > 0) {
                        echo 'Обнаружены ставки по тендеру, удаление записи невозможно.';
                    } else {
                        if (strlen($row->image_id_lists) > 0 && $is_delete === 1) {
                            $img_names = explode(';', $row->image_id_lists);
                            for ($i = 0; $i < count($img_names); $i++) {
                                if (false === wp_delete_attachment($img_names[$i], true)) {
                                    echo "Не удалось удалить файл с изображением: " . $img_names[$i]->get_error_message();
                                    array_push($errors, "Не удалось удалить файл с изображением: " . $img_names[$i]->get_error_message());
                                }
                            }
                        }
                        if (count($errors) === 0) {
                            if ($is_delete === 1) {
                                $sql = "DELETE FROM " . TZS_AUCTIONS_TABLE . " WHERE id={$id} AND user_id={$user_id};";
                            } else {
                                $sql = "UPDATE " . TZS_AUCTIONS_TABLE . " SET active=0 WHERE id={$id} AND user_id={$user_id};";
                            }
                            if (false === $wpdb->query($sql)) {
                                if ($is_delete === 1) {
                                    echo "Не удалось удалить Ваш тендер. Свяжитесь, пожалуйста, с администрацией сайта ";
                                } else {
                                    echo "Не удалось перенести в архив Ваш тендер. Свяжитесь, пожалуйста, с администрацией сайта ";
                                }
                            } else {
                                echo "1";
                            }
                        }
                    }
                }
            }
        }
    }
    die;
}

function delete_attachment($post)
{
    //echo $_POST['att_ID'];
    $msg = 'Attachment ID [' . $_POST['att_ID'] . '] has been deleted!';
    if (wp_delete_attachment($_POST['att_ID'], true)) {
        echo $msg;
    }
    die;
}