~15 minutes In the directory "%~/include/persistent_classes%" create four files containing classes: %category.php% containing the class %wpcCategory% with the attributes: |ff0000|$id| and |ff0000|$name|. %image.php% containing the class %wpcImage% with the attributes: |ff0000|$id|, |ff0000|$messageId|, |ff0000|$category_id|, |ff0000|$description|, |ff0000|$send_time|, |ff0000|$orig_x_size|, |ff0000|$orig_y_size|, |ff0000|$owner_email|, |ff0000|$owner_name| and |ff0000|$shutterspeed|. %image_file.php% containing the class %wpcImageFile% with the attributes: |ff0000|$id|, |ff0000|$image_id|, |ff0000|$type| and |ff0000|$data|. %log.php% containing the class %wpcLog% with the attributes: |ff0000|$id|, |ff0000|$logtime|, |ff0000|$src|, |ff0000|$category| and |ff0000|$message|.