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<title>[56839] trunk/src/wp-includes/blocks.php: Editor: Harden the display of footnotes.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/56839">56839</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/56839","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>jorbin</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-10-12 12:56:38 +0000 (Thu, 12 Oct 2023)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Editor: Harden the display of footnotes.
Props: jorgefilipecosta, peterwilsoncc, costdev, xknown, jorbin.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesblocksphp">trunk/src/wp-includes/blocks.php</a></li>
</ul>
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<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesblocksphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/blocks.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/blocks.php 2023-10-12 12:45:49 UTC (rev 56838)
+++ trunk/src/wp-includes/blocks.php 2023-10-12 12:56:38 UTC (rev 56839)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1946,3 +1946,89 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> return null;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+/**
+ * Strips all HTML from the content of footnotes, and sanitizes the ID.
+ * This function expects slashed data on the footnotes content.
+ *
+ * @access private
+ * @since 6.3.2
+ *
+ * @param string $footnotes JSON encoded string of an array containing the content and ID of each footnote.
+ * @return string Filtered content without any HTML on the footnote content and with the sanitized id.
+ */
+function _wp_filter_post_meta_footnotes( $footnotes ) {
+ $footnotes_decoded = json_decode( $footnotes, true );
+ if ( ! is_array( $footnotes_decoded ) ) {
+ return '';
+ }
+ $footnotes_sanitized = array();
+ foreach ( $footnotes_decoded as $footnote ) {
+ if ( ! empty( $footnote['content'] ) && ! empty( $footnote['id'] ) ) {
+ $footnotes_sanitized[] = array(
+ 'id' => sanitize_key( $footnote['id'] ),
+ 'content' => wp_unslash( wp_filter_post_kses( wp_slash( $footnote['content'] ) ) ),
+ );
+ }
+ }
+ return wp_json_encode( $footnotes_sanitized );
+}
+
+/**
+ * Adds the filters to filter footnotes meta field.
+ *
+ * @access private
+ * @since 6.3.2
+ */
+function _wp_footnotes_kses_init_filters() {
+ add_filter( 'sanitize_post_meta_footnotes', '_wp_filter_post_meta_footnotes' );
+}
+
+/**
+ * Removes the filters that filter footnotes meta field.
+ *
+ * @access private
+ * @since 6.3.2
+ */
+function _wp_footnotes_remove_filters() {
+ remove_filter( 'sanitize_post_meta_footnotes', '_wp_filter_post_meta_footnotes' );
+}
+
+/**
+ * Registers the filter of footnotes meta field if the user does not have unfiltered_html capability.
+ *
+ * @access private
+ * @since 6.3.2
+ */
+function _wp_footnotes_kses_init() {
+ _wp_footnotes_remove_filters();
+ if ( ! current_user_can( 'unfiltered_html' ) ) {
+ _wp_footnotes_kses_init_filters();
+ }
+}
+
+/**
+ * Initializes footnotes meta field filters when imported data should be filtered.
+ *
+ * This filter is the last being executed on force_filtered_html_on_import.
+ * If the input of the filter is true it means we are in an import situation and should
+ * enable kses, independently of the user capabilities.
+ * So in that case we call _wp_footnotes_kses_init_filters;
+ *
+ * @access private
+ * @since 6.3.2
+ *
+ * @param string $arg Input argument of the filter.
+ * @return string Input argument of the filter.
+ */
+function _wp_footnotes_force_filtered_html_on_import_filter( $arg ) {
+ // force_filtered_html_on_import is true we need to init the global styles kses filters.
+ if ( $arg ) {
+ _wp_footnotes_kses_init_filters();
+ }
+ return $arg;
+}
+
+add_action( 'init', '_wp_footnotes_kses_init' );
+add_action( 'set_current_user', '_wp_footnotes_kses_init' );
+add_filter( 'force_filtered_html_on_import', '_wp_footnotes_force_filtered_html_on_import_filter', 999 );
</ins></span></pre>
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