From bf282a5c027c7d61f20949d23152a61026c478c3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?N=C3=A9stor=20Soriano?= <nestor.soriano@automattic.com>
Date: Wed, 1 Dec 2021 13:58:56 +0100
Subject: [PATCH] Fix code that causes PHP 8.1 deprecation in
 BlockTypesController (#5287)

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

diff --git a/src/BlockTypesController.php b/src/BlockTypesController.php
index b742aa2d94e..dbc38806438 100644
--- a/src/BlockTypesController.php
+++ b/src/BlockTypesController.php
@@ -76,7 +76,7 @@ public function register_blocks() {
 	 */
 	public function add_data_attributes( $content, $block ) {
 		$block_name      = $block['blockName'];
-		$block_namespace = strtok( $block_name, '/' );
+		$block_namespace = strtok( $block_name ?? '', '/' );
 
 		/**
 		 * Filters the list of allowed block namespaces.