woothemes / sensei

				// Check it doesn't already exist

				$sql = $wpdb->prepare( $check_existing_sql, $lesson_id, $user_id );

				$comment_ID = $wpdb->get_var( $sql );

				if ( !$comment_ID ) {

					// Bypassing WP wp_insert_comment( $data ), so no actions/filters are run

					$wpdb->insert($wpdb->comments, $data);

					$comment_ID = (int) $wpdb->insert_id;

					if ( $comment_ID && !empty($meta_data) ) {

						foreach ( $meta_data as $key => $value ) {

							// Bypassing WP add_comment_meta(() so no actions/filters are run

							if ( $wpdb->get_var( $wpdb->prepare(

									"SELECT COUNT(*) FROM $wpdb->commentmeta WHERE comment_id = %d AND meta_key = %s ",

									$comment_ID, $key ) ) ) {

									continue; // Found the meta data already

							}

							$result = $wpdb->insert( $wpdb->commentmeta, array(

								'comment_id' => $comment_ID,

								'meta_key' => $key,

								'meta_value' => $value

							) );

						}

					}

				}

			}

		}

		$wpdb->flush();

				// Check it doesn't already exist

				$sql = $wpdb->prepare( $check_existing_sql, $course_id, $user_id );

				$comment_ID = $wpdb->get_var( $sql );

				if ( !$comment_ID ) {

					// Bypassing WP wp_insert_comment( $data ), so no actions/filters are run

					$wpdb->insert($wpdb->comments, $data);

					$comment_ID = (int) $wpdb->insert_id;

					if ( $comment_ID && !empty($meta_data) ) {

						foreach ( $meta_data as $key => $value ) {

							// Bypassing WP wp_insert_comment( $data ), so no actions/filters are run

							if ( $wpdb->get_var( $wpdb->prepare(

									"SELECT COUNT(*) FROM $wpdb->commentmeta WHERE comment_id = %d AND meta_key = %s ",

									$comment_ID, $key ) ) ) {

									continue; // Found the meta data already

							}

							$result = $wpdb->insert( $wpdb->commentmeta, array(

								'comment_id' => $comment_ID,

								'meta_key' => $key,

								'meta_value' => $value

							) );

						}

					}

				}

			}

		}

		$wpdb->flush();