public function settings_save() {
		if ( ! is_admin() ) {
			return;
		}

		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		if ( isset( $_POST['llms-permalinks-nonce'] ) && wp_verify_nonce( sanitize_key( $_POST['llms-permalinks-nonce'] ), 'llms-permalinks' ) ) {
			llms_switch_to_site_locale();

			$permalinks = llms_get_permalink_structure();

			$permalinks['course_base']               = isset( $_POST['llms_course_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_course_base'] ) ) : $permalinks['course_base'];
			$permalinks['courses_base']              = isset( $_POST['llms_courses_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_courses_base'] ) ) : $permalinks['courses_base'];
			$permalinks['memberships_base']          = isset( $_POST['llms_memberships_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_memberships_base'] ) ) : $permalinks['memberships_base'];
			$permalinks['lesson_base']               = isset( $_POST['llms_lesson_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_lesson_base'] ) ) : $permalinks['lesson_base'];
			$permalinks['quiz_base']                 = isset( $_POST['llms_quiz_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_quiz_base'] ) ) : $permalinks['quiz_base'];
			$permalinks['certificate_template_base'] = isset( $_POST['llms_certificate_template_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_certificate_template_base'] ) ) : $permalinks['certificate_template_base'];
			$permalinks['certificate_base']          = isset( $_POST['llms_certificate_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_certificate_base'] ) ) : $permalinks['certificate_base'];
			$permalinks['course_category_base']      = isset( $_POST['llms_course_category_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_course_category_base'] ) ) : $permalinks['course_category_base'];
			$permalinks['course_tag_base']           = isset( $_POST['llms_course_tag_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_course_tag_base'] ) ) : $permalinks['course_tag_base'];
			$permalinks['course_track_base']         = isset( $_POST['llms_course_track_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_course_track_base'] ) ) : $permalinks['course_track_base'];
			$permalinks['course_difficulty_base']    = isset( $_POST['llms_course_difficulty_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_course_difficulty_base'] ) ) : $permalinks['course_difficulty_base'];
			$permalinks['membership_category_base']  = isset( $_POST['llms_membership_category_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_membership_category_base'] ) ) : $permalinks['membership_category_base'];
			$permalinks['membership_tag_base']       = isset( $_POST['llms_membership_tag_base'] ) ? sanitize_text_field( wp_unslash( $_POST['llms_membership_tag_base'] ) ) : $permalinks['membership_tag_base'];

			llms_set_permalink_structure( $permalinks );

			llms_restore_locale();
		}
	}