Trim footnote anchors from excerpts (#52518)

* Trim footnote anchors from excerpts * Add comments, fix spacing, appease linter
WordPress · Jul 12, 2023 · c286d1d · c286d1d
1 parent af38c95
commit c286d1d
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diff --git a/lib/compat/wordpress-6.3/footnotes.php b/lib/compat/wordpress-6.3/footnotes.php
@@ -0,0 +1,25 @@
+<?php
+/**
+ * Compatiblity filters for improved footnotes support.
+ *
+ * In core, this could be fixed directly in key functions.
+ *
+ * @package gutenberg
+ */
+
+/**
+ * Trims footnote anchors from content.
+ *
+ * @param string $content HTML content.
+ * @return string Filtered content.
+ */
+function gutenberg_trim_footnotes( $content ) {
+	if ( ! doing_filter( 'get_the_excerpt' ) ) {
+		return $content;
+	}
+
+	static $footnote_pattern = '_<sup data-fn="[^"]+" class="[^"]+">\s*<a href="[^"]+" id="[^"]+">\d+</a>\s*</sup>_';
+	return preg_replace( $footnote_pattern, '', $content );
+}
+
+add_filter( 'the_content', 'gutenberg_trim_footnotes' );
diff --git a/lib/load.php b/lib/load.php
@@ -57,6 +57,7 @@ function gutenberg_is_experiment_enabled( $name ) {
 	require_once __DIR__ . '/compat/wordpress-6.3/link-template.php';
 	require_once __DIR__ . '/compat/wordpress-6.3/block-patterns.php';
 	require_once __DIR__ . '/compat/wordpress-6.3/class-gutenberg-rest-blocks-controller.php';
+	require_once __DIR__ . '/compat/wordpress-6.3/footnotes.php';
 
 	// Experimental.
 	if ( ! class_exists( 'WP_Rest_Customizer_Nonces' ) ) {