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<title>[58980] HTML API: Indicate when WordPress rejects attribute updates.</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/58980">58980</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/58980","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>hellofromTonya</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2024-09-03 20:13:38 +0000 (Tue, 03 Sep 2024)</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'>HTML API: Indicate when WordPress rejects attribute updates.
When setting an an attribute value in the HTML API, WordPress may reject
an update based on rules in `kses`. In these cases, the return value from
an escaping function will be an empty string, and the HTML API should
reject the update. Unfortunately, it currently reports that it updates the
attribute but sets an empty string value, which is misleading.
In this changeset, the HTML API will refuse the attribute update and return
false to indicate as much when WordPress rejects the updates.
Reviewed by jorbin, hellofromTonya.
Merges <a href="https://core.trac.wordpress.org/changeset/58844">[58844]</a> to the 6.6 branch.
Follow-up to <a href="https://core.trac.wordpress.org/changeset/58472">[58472]</a>.
Props amitraj2203, dmsnell, mukesh27.
Fixes <a href="https://core.trac.wordpress.org/ticket/61719">#61719</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branches66srcwpincludeshtmlapiclasswphtmltagprocessorphp">branches/6.6/src/wp-includes/html-api/class-wp-html-tag-processor.php</a></li>
</ul>
<h3>Property Changed</h3>
<ul>
<li><a href="#branches66">branches/6.6/</a></li>
</ul>
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<h3>Diff</h3>
<span class="cx" style="display: block; padding: 0 10px">Index: branches/6.6
</span><span class="cx" style="display: block; padding: 0 10px">===================================================================
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">--- branches/6.6 2024-09-03 20:04:59 UTC (rev 58979)
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+++ branches/6.6 2024-09-03 20:13:38 UTC (rev 58980)
</ins><a id="branches66"></a>
<div class="propset"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Property changes: branches/6.6</h4>
<pre class="diff"><span>
</span></pre></div>
<a id="svnmergeinfo"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: svn:mergeinfo</h4></div>
<span class="cx" style="display: block; padding: 0 10px"> /branches/5.0:43681-43682,43684-43688,43719-43720,43723,43726-43727,43729-43731,43734-43744,43747,43751-43754,43758,43760-43765,43767-43770,43772,43774-43781,43783,43785,43790-43806,43808-43821,43825,43828,43830-43834,43836-43843,43846-43863,43867-43889,43891-43894,43897-43905,43908-43909,43911-43929,43931-43942,43946-43947,43949-43956,43959-43964,43967-43969,43988,43994,44014,44017,44047,44183,44185,44187-44206,44208-44213,44231-44232,44235,44248,44284,44287-44288
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/5.5:49373-49379,49381
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/5.8:51889
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-/trunk:58570,58585,58588,58612,58617-58618,58671-58672,58685,58690-58691,58693,58710,58718-58719,58744,58747-58750,58755-58757,58763,58773-58774,58804,58812,58825,58850,58856,58864,58884,58914,58976
</del><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/trunk:58570,58585,58588,58612,58617-58618,58671-58672,58685,58690-58691,58693,58710,58718-58719,58744,58747-58750,58755-58757,58763,58773-58774,58804,58812,58825,58844,58850,58856,58864,58884,58914,58976
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="branches66srcwpincludeshtmlapiclasswphtmltagprocessorphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/6.6/src/wp-includes/html-api/class-wp-html-tag-processor.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/6.6/src/wp-includes/html-api/class-wp-html-tag-processor.php 2024-09-03 20:04:59 UTC (rev 58979)
+++ branches/6.6/src/wp-includes/html-api/class-wp-html-tag-processor.php 2024-09-03 20:13:38 UTC (rev 58980)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2980,6 +2980,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @see https://html.spec.whatwg.org/#attributes-3
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> $escaped_new_value = in_array( $comparable_name, wp_kses_uri_attributes() ) ? esc_url( $value ) : esc_attr( $value );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+ // If the escaping functions wiped out the update, reject it and indicate it was rejected.
+ if ( '' === $escaped_new_value && '' !== $value ) {
+ return false;
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> $updated_attribute = "{$name}=\"{$escaped_new_value}\"";
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span></span></pre>
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