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<title>[56742] trunk/src/wp-includes: Editor: Replace property_exists calls in block related functions with instanceof</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/56742">56742</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/56742","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>spacedmonkey</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-09-29 10:18:05 +0000 (Fri, 29 Sep 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: Replace property_exists calls in block related functions with instanceof

Replace calls to `property_exists` with `instanceof WP_Block_Type` in block related functions. This change not only improves type safety but also enhances performance.

Follow on from <a href="https://core.trac.wordpress.org/changeset/56678">[56678]</a> and <a href="https://core.trac.wordpress.org/changeset/56677">[56677]</a>.

Props gziolo, aristath, aaronrobertshaw, spacedmonkey.
Fixes <a href="https://core.trac.wordpress.org/ticket/59453">#59453</a></pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesblocksupportsborderphp">trunk/src/wp-includes/block-supports/border.php</a></li>
<li><a href="#trunksrcwpincludesblocksupportscolorsphp">trunk/src/wp-includes/block-supports/colors.php</a></li>
<li><a href="#trunksrcwpincludesblocksupportstypographyphp">trunk/src/wp-includes/block-supports/typography.php</a></li>
<li><a href="#trunksrcwpincludesclasswpblocksupportsphp">trunk/src/wp-includes/class-wp-block-supports.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesblocksupportsborderphp"></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/block-supports/border.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/block-supports/border.php   2023-09-28 22:30:20 UTC (rev 56741)
+++ trunk/src/wp-includes/block-supports/border.php     2023-09-29 10:18:05 UTC (rev 56742)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -152,7 +152,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> function wp_has_border_feature_support( $block_type, $feature, $default_value = false ) {
</span><span class="cx" style="display: block; padding: 0 10px">        // Check if all border support features have been opted into via `"__experimentalBorder": true`.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( property_exists( $block_type, 'supports' ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( $block_type instanceof WP_Block_Type ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                 $block_type_supports_border = isset( $block_type->supports['__experimentalBorder'] )
</span><span class="cx" style="display: block; padding: 0 10px">                        ? $block_type->supports['__experimentalBorder']
</span><span class="cx" style="display: block; padding: 0 10px">                        : $default_value;
</span></span></pre></div>
<a id="trunksrcwpincludesblocksupportscolorsphp"></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/block-supports/colors.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/block-supports/colors.php   2023-09-28 22:30:20 UTC (rev 56741)
+++ trunk/src/wp-includes/block-supports/colors.php     2023-09-29 10:18:05 UTC (rev 56742)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -17,7 +17,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> function wp_register_colors_support( $block_type ) {
</span><span class="cx" style="display: block; padding: 0 10px">        $color_support = false;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( property_exists( $block_type, 'supports' ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( $block_type instanceof WP_Block_Type ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                 $color_support = isset( $block_type->supports['color'] ) ? $block_type->supports['color'] : false;
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px">        $has_text_colors_support       = true === $color_support ||
</span></span></pre></div>
<a id="trunksrcwpincludesblocksupportstypographyphp"></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/block-supports/typography.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/block-supports/typography.php       2023-09-28 22:30:20 UTC (rev 56741)
+++ trunk/src/wp-includes/block-supports/typography.php 2023-09-29 10:18:05 UTC (rev 56742)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -16,7 +16,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * @param WP_Block_Type $block_type Block Type.
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> function wp_register_typography_support( $block_type ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( ! property_exists( $block_type, 'supports' ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! ( $block_type instanceof WP_Block_Type ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                 return;
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -85,7 +85,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * @return array Typography CSS classes and inline styles.
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> function wp_apply_typography_support( $block_type, $block_attributes ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( ! property_exists( $block_type, 'supports' ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! ( $block_type instanceof WP_Block_Type ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                 return array();
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="trunksrcwpincludesclasswpblocksupportsphp"></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/class-wp-block-supports.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/class-wp-block-supports.php 2023-09-28 22:30:20 UTC (rev 56741)
+++ trunk/src/wp-includes/class-wp-block-supports.php   2023-09-29 10:18:05 UTC (rev 56742)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -142,7 +142,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $block_registry         = WP_Block_Type_Registry::get_instance();
</span><span class="cx" style="display: block; padding: 0 10px">                $registered_block_types = $block_registry->get_all_registered();
</span><span class="cx" style="display: block; padding: 0 10px">                foreach ( $registered_block_types as $block_type ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        if ( ! property_exists( $block_type, 'supports' ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( ! ( $block_type instanceof WP_Block_Type ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                                 continue;
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( ! $block_type->attributes ) {
</span></span></pre>
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