From 59e55af520fd408d0389b683a073156164393ba6 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov@git.wordpress.org>
Date: Sat, 29 May 2021 18:41:09 +0000
Subject: [PATCH] Docs: Document that `has_block()` does not check reusable
 blocks.

Since the function only checks the raw, non-parsed post content, reusable blocks are just a `core/block` type and nothing more at that point.

In order to also check reusable blocks, the content needs to be parsed using `parse_blocks()` first.

Props vyskoczilova, peterwilsoncc.
Fixes #53140.

git-svn-id: https://develop.svn.wordpress.org/trunk@51046 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/blocks.php | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/wp-includes/blocks.php b/src/wp-includes/blocks.php
index 26f82f8624..1e7113e1d2 100644
--- a/src/wp-includes/blocks.php
+++ b/src/wp-includes/blocks.php
@@ -374,7 +374,8 @@ function unregister_block_type( $name ) {
  *
  * @see parse_blocks()
  *
- * @param int|string|WP_Post|null $post Optional. Post content, post ID, or post object. Defaults to global $post.
+ * @param int|string|WP_Post|null $post Optional. Post content, post ID, or post object.
+ *                                      Defaults to global $post.
  * @return bool Whether the post has blocks.
  */
 function has_blocks( $post = null ) {
@@ -392,15 +393,16 @@ function has_blocks( $post = null ) {
  * Determine whether a $post or a string contains a specific block type.
  *
  * This test optimizes for performance rather than strict accuracy, detecting
- * the block type exists but not validating its structure. For strict accuracy,
- * you should use the block parser on post content.
+ * whether the block type exists but not validating its structure and not checking
+ * reusable blocks. For strict accuracy, you should use the block parser on post content.
  *
  * @since 5.0.0
  *
  * @see parse_blocks()
  *
- * @param string                  $block_name Full Block type to look for.
- * @param int|string|WP_Post|null $post Optional. Post content, post ID, or post object. Defaults to global $post.
+ * @param string                  $block_name Full block type to look for.
+ * @param int|string|WP_Post|null $post       Optional. Post content, post ID, or post object.
+ *                                            Defaults to global $post.
  * @return bool Whether the post content contains the specified block.
  */
 function has_block( $block_name, $post = null ) {