* @param string $option  Option name.
 * @return int Page id.
 */
function llms_create_page( $slug, $title = '', $content = '', $option = '' ) {

	$option_val = get_option( $option );

	// See if there's a valid page already stored for the option we're trying to create.
	if ( $option_val && is_numeric( $option_val ) ) {
		$page_object = get_post( $option_val );
		if ( $page_object && 'page' === $page_object->post_type &&
				! in_array( $page_object->post_status, array( 'pending', 'trash', 'future', 'auto-draft' ), true ) ) {
			return $page_object->ID;
		}
	}

	global $wpdb;

	// Search for an existing page with the specified page content like a shortcode.
	if ( strlen( $content ) > 0 ) {
		$page_id = $wpdb->get_var(
			$wpdb->prepare(
				"SELECT ID FROM $wpdb->posts WHERE post_type='page' AND post_status NOT IN ( 'pending', 'trash', 'future', 'auto-draft' ) AND post_content LIKE %s LIMIT 1;",
				"%{$content}%"
			)
		);// no-cache ok.
	} else {
		$page_id = $wpdb->get_var(
			$wpdb->prepare(
				"SELECT ID FROM $wpdb->posts WHERE post_type='page' AND post_status NOT IN ( 'pending', 'trash', 'future', 'auto-draft' )  AND post_name = %s LIMIT 1;",
				$slug
			)
		);// no-cache ok.
	}

	/**
	 * Filters the ID of the page to be created.
	 *
	 * @since 3.0.0
	 *
	 * @param int     $page_id The WP_Post ID of the page.
	 * @param string  $slug    The page slug.
	 * @param string  $content THe content of the page.
	 */
	$page_id = apply_filters( 'llms_create_page_id', $page_id, $slug, $content );
	if ( $page_id ) {
		if ( $option ) {
			update_option( $option, $page_id );
		}
		return $page_id;
	}

	// Look in the trashed page by content.
	if ( strlen( $content ) > 0 ) {
		$trashed_id = $wpdb->get_var(
			$wpdb->prepare(
				"SELECT ID FROM $wpdb->posts WHERE post_type='page' AND post_status = 'trash' AND post_content LIKE %s LIMIT 1;",
				"%{$content}%"
			)
		);// no-cache ok.
	} else {
		$trashed_id = $wpdb->get_var(
			$wpdb->prepare(