From ed0d1978aa3bb41c3d5ca4e94836c05a568fec6c Mon Sep 17 00:00:00 2001
From: "Dylan K. Taylor" <odigiman@gmail.com>
Date: Mon, 1 Jun 2020 12:46:41 +0100
Subject: [PATCH] WritableBook: fixed thrown exception when asking for a page
 that doesn't exist (it's allowed to return null for a reason ...)

---
 src/pocketmine/item/WritableBook.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pocketmine/item/WritableBook.php b/src/pocketmine/item/WritableBook.php
index 25585040d..22731aba4 100644
--- a/src/pocketmine/item/WritableBook.php
+++ b/src/pocketmine/item/WritableBook.php
@@ -50,7 +50,7 @@ class WritableBook extends Item{
 	 */
 	public function getPageText(int $pageId) : ?string{
 		$pages = $this->getNamedTag()->getListTag(self::TAG_PAGES);
-		if($pages === null){
+		if($pages === null or !$pages->isset($pageId)){
 			return null;
 		}