From 54f218ae1881084eea0d73479a9c600bac4fd140 Mon Sep 17 00:00:00 2001
From: isabel_brison <isabel_brison@git.wordpress.org>
Date: Mon, 17 Jul 2023 01:47:26 +0000
Subject: [PATCH] Editor: trim footnote anchors from post excerpts.

Adds the `excerpt_remove_footnotes` function to trim footnote anchors from post excerpts.

Props: ramonopoly, costdev, mukesh27, mcsf, azaozz.
Fixes #58805.

Built from https://develop.svn.wordpress.org/trunk@56244


git-svn-id: http://core.svn.wordpress.org/trunk@55756 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/blocks.php     | 21 +++++++++++++++++++++
 wp-includes/formatting.php |  3 +++
 wp-includes/version.php    |  2 +-
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/wp-includes/blocks.php b/wp-includes/blocks.php
index fd287370de..347839f09a 100644
--- a/wp-includes/blocks.php
+++ b/wp-includes/blocks.php
@@ -1009,6 +1009,27 @@ function excerpt_remove_blocks( $content ) {
 	return $output;
 }
 
+/**
+ * Parses footnotes markup out of a content string,
+ * and renders those appropriate for the excerpt.
+ *
+ * @since 6.3.0
+ *
+ * @param string $content The content to parse.
+ * @return string The parsed and filtered content.
+ */
+function excerpt_remove_footnotes( $content ) {
+	if ( ! str_contains( $content, 'data-fn=' ) ) {
+		return $content;
+	}
+
+	return preg_replace(
+		'_<sup data-fn="[^"]+" class="[^"]+">\s*<a href="[^"]+" id="[^"]+">\d+</a>\s*</sup>_',
+		'',
+		$content
+	);
+}
+
 /**
  * Renders inner blocks from the allowed wrapper blocks
  * for generating an excerpt.
diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index a3e35599c0..9ce636edd5 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -3952,6 +3952,7 @@ function human_time_diff( $from, $to = 0 ) {
  *
  * @since 1.5.0
  * @since 5.2.0 Added the `$post` parameter.
+ * @since 6.3.0 Removes footnotes markup from the excerpt content.
  *
  * @param string             $text Optional. The excerpt. If set to empty, an excerpt is generated.
  * @param WP_Post|object|int $post Optional. WP_Post instance or Post ID/object. Default null.
@@ -3966,6 +3967,7 @@ function wp_trim_excerpt( $text = '', $post = null ) {
 
 		$text = strip_shortcodes( $text );
 		$text = excerpt_remove_blocks( $text );
+		$text = excerpt_remove_footnotes( $text );
 
 		/*
 		 * Temporarily unhook wp_filter_content_tags() since any tags
@@ -4008,6 +4010,7 @@ function wp_trim_excerpt( $text = '', $post = null ) {
 		 */
 		$excerpt_more = apply_filters( 'excerpt_more', ' ' . '[&hellip;]' );
 		$text         = wp_trim_words( $text, $excerpt_length, $excerpt_more );
+
 	}
 
 	/**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 42caa0b092..3adfdddbfd 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.3-beta4-56243';
+$wp_version = '6.3-beta4-56244';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.