From 356d8f0ed2a4e040a045500e7c62038f65117c9c Mon Sep 17 00:00:00 2001
From: Don Bowman <don@agilicus.com>
Date: Thu, 18 Aug 2022 19:37:10 -0400
Subject: [PATCH] fix: check if max_page is set

This avoids the warning:

    PHP message: PHP Warning:  Undefined variable $max_page in

that otherwise occurs
---
 feed-json-functions.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/feed-json-functions.php b/feed-json-functions.php
index 7309332..4c78a16 100644
--- a/feed-json-functions.php
+++ b/feed-json-functions.php
@@ -51,7 +51,7 @@ function get_link_from_json_feed( $link ) {
 
 function get_json_feed_next_url() {
 	global $paged, $wp_query;
-	if ( ! $max_page ) {
+	if ( ! isset($max_page) || ! $max_page ) {
 		$max_page = $wp_query->max_num_pages;
 	}