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<title>[50764] trunk/src: Site Health: Support custom sub-menus and pages.</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/50764">50764</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/50764","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>Clorith</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2021-04-17 01:12:25 +0000 (Sat, 17 Apr 2021)</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'>Site Health: Support custom sub-menus and pages.

Allow developers to extend the Site Health screen with their own custom navigation tabs and pages.

This implements a new filter, `site_health_navigation_tabs`, which takes an associated array of tab identifiers/slugs, and tab labels, allowing developers to add their own subpage to the Site Health interface as new tabs.

To output a custom page, or add to an existing page, the `site_health_tab_content` action is triggered whenever the `tab` query argument is present and not empty. This action includes the current tab as its argument, which a developer would match against to only output content when relevant.

Props ramiy for initial patch.
Fixes <a href="https://core.trac.wordpress.org/ticket/47225">#47225</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcjs_enqueuesadminsitehealthjs">trunk/src/js/_enqueues/admin/site-health.js</a></li>
<li><a href="#trunksrcwpadmincsssitehealthcss">trunk/src/wp-admin/css/site-health.css</a></li>
<li><a href="#trunksrcwpadminincludesclasswpsitehealthphp">trunk/src/wp-admin/includes/class-wp-site-health.php</a></li>
<li><a href="#trunksrcwpadminsitehealthinfophp">trunk/src/wp-admin/site-health-info.php</a></li>
<li><a href="#trunksrcwpadminsitehealthphp">trunk/src/wp-admin/site-health.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcjs_enqueuesadminsitehealthjs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/js/_enqueues/admin/site-health.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/js/_enqueues/admin/site-health.js       2021-04-16 17:24:47 UTC (rev 50763)
+++ trunk/src/js/_enqueues/admin/site-health.js 2021-04-17 01:12:25 UTC (rev 50764)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -443,4 +443,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        recalculateProgression();
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       // Trigger a class toggle when the extended menu button is clicked.
+       $( '.health-check-offscreen-nav-wrapper' ).on( 'click', function() {
+               $( this ).toggleClass( 'visible' );
+       } );
</ins><span class="cx" style="display: block; padding: 0 10px"> } );
</span></span></pre></div>
<a id="trunksrcwpadmincsssitehealthcss"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/css/site-health.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/css/site-health.css    2021-04-16 17:24:47 UTC (rev 50763)
+++ trunk/src/wp-admin/css/site-health.css      2021-04-17 01:12:25 UTC (rev 50764)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -118,12 +118,22 @@
</span><span class="cx" style="display: block; padding: 0 10px"> .health-check-tabs-wrapper {
</span><span class="cx" style="display: block; padding: 0 10px">        /* IE 11 */
</span><span class="cx" style="display: block; padding: 0 10px">        display: -ms-inline-grid;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        -ms-grid-columns: 1fr 1fr;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ -ms-grid-columns: 1fr 1fr 1fr 1fr;
</ins><span class="cx" style="display: block; padding: 0 10px">         vertical-align: top;
</span><span class="cx" style="display: block; padding: 0 10px">        /* modern browsers */
</span><span class="cx" style="display: block; padding: 0 10px">        display: inline-grid;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        grid-template-columns: 1fr 1fr 1fr 1fr;
+}
+
+.health-check-tabs-wrapper.tab-count-1 {
+       grid-template-columns: 1fr;
+}
+.health-check-tabs-wrapper.tab-count-2 {
</ins><span class="cx" style="display: block; padding: 0 10px">         grid-template-columns: 1fr 1fr;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.health-check-tabs-wrapper.tab-count-3 {
+       grid-template-columns: 1fr 1fr 1fr;
+}
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> .health-check-tab {
</span><span class="cx" style="display: block; padding: 0 10px">        display: block; /* IE 11 */
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -134,6 +144,43 @@
</span><span class="cx" style="display: block; padding: 0 10px">        transition: box-shadow 0.5s ease-in-out;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.health-check-offscreen-nav-wrapper {
+       position: relative;
+       background: transparent;
+       border: none;
+}
+.health-check-offscreen-nav-wrapper:focus .health-check-offscreen-nav {
+       left: initial;
+}
+
+.health-check-offscreen-nav {
+       display: none;
+       position: absolute;
+       padding-top: 10px;
+       right: 0;
+       top: 100%;
+       width: 13rem;
+}
+.health-check-offscreen-nav-wrapper.visible .health-check-offscreen-nav {
+       display: inline-block;
+}
+.health-check-offscreen-nav:before {
+       position: absolute;
+       content: "";
+       width: 0;
+       height: 0;
+       border-style: solid;
+       border-width: 0 10px 5px 10px;
+       border-color: transparent transparent #ffffff transparent;
+       right: 20px;
+       top: 5px;
+}
+
+.health-check-offscreen-nav .health-check-tab {
+       background: #fff;
+       box-shadow: 0 2px 5px 0 rgba( 0, 0, 0, 0.75 );
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> .health-check-tab:nth-child(1) {
</span><span class="cx" style="display: block; padding: 0 10px">        -ms-grid-column: 1; /* IE 11 */
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -152,6 +199,10 @@
</span><span class="cx" style="display: block; padding: 0 10px">        box-shadow: inset 0 -3px #3582c4;
</span><span class="cx" style="display: block; padding: 0 10px">        font-weight: 600;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.health-check-offscreen-nav .health-check-tab.active {
+       box-shadow: inset 3px 0 #3582c4;
+       font-weight: 600;
+}
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> .health-check-body {
</span><span class="cx" style="display: block; padding: 0 10px">        max-width: 800px;
</span></span></pre></div>
<a id="trunksrcwpadminincludesclasswpsitehealthphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/includes/class-wp-site-health.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/includes/class-wp-site-health.php      2021-04-16 17:24:47 UTC (rev 50763)
+++ trunk/src/wp-admin/includes/class-wp-site-health.php        2021-04-17 01:12:25 UTC (rev 50764)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -50,9 +50,24 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
</span><span class="cx" style="display: block; padding: 0 10px">                add_action( 'wp_site_health_scheduled_check', array( $this, 'wp_cron_scheduled_check' ) );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+               add_action( 'site_health_tab_content', array( $this, 'show_site_health_tab' ) );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * Output the content of a tab in the Site Health screen.
+        *
+        * @since 5.8.0
+        *
+        * @param string $tab Slug of the current tab being displayed.
+        */
+       public function show_site_health_tab( $tab ) {
+               if ( 'debug' === $tab ) {
+                       require_once ABSPATH . '/wp-admin/site-health-info.php';
+               }
+       }
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * Return an instance of the WP_Site_Health class, or create one if none exist yet.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 5.4.0
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -103,7 +118,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        $health_check_js_variables['site_status']['issues'] = $issue_counts;
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( 'site-health' === $screen->id && ! isset( $_GET['tab'] ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         if ( 'site-health' === $screen->id && ( ! isset( $_GET['tab'] ) || empty( $_GET['tab'] ) ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                         $tests = WP_Site_Health::get_tests();
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        // Don't run https test on development environments.
</span></span></pre></div>
<a id="trunksrcwpadminsitehealthinfophp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/site-health-info.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/site-health-info.php   2021-04-16 17:24:47 UTC (rev 50763)
+++ trunk/src/wp-admin/site-health-info.php     2021-04-17 01:12:25 UTC (rev 50764)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -6,18 +6,10 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * @subpackage Administration
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-/** WordPress Administration Bootstrap */
-require_once __DIR__ . '/admin.php';
-
-$title = __( 'Site Health Info' );
-
-if ( ! current_user_can( 'view_site_health_checks' ) ) {
-       wp_die( __( 'Sorry, you are not allowed to access the debug data.' ), '', 403 );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+if ( ! defined( 'ABSPATH' ) ) {
+       die();
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-wp_enqueue_style( 'site-health' );
-wp_enqueue_script( 'site-health' );
-
</del><span class="cx" style="display: block; padding: 0 10px"> if ( ! class_exists( 'WP_Debug_Data' ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">        require_once ABSPATH . 'wp-admin/includes/class-wp-debug-data.php';
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -26,47 +18,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> $health_check_site_status = WP_Site_Health::get_instance();
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
-require_once ABSPATH . 'wp-admin/admin-header.php';
</del><span class="cx" style="display: block; padding: 0 10px"> ?>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-<div class="health-check-header">
-       <div class="health-check-title-section">
-               <h1>
-                       <?php _e( 'Site Health' ); ?>
-               </h1>
-       </div>
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        <div class="health-check-title-section site-health-progress-wrapper loading hide-if-no-js">
-               <div class="site-health-progress">
-                       <svg role="img" aria-hidden="true" focusable="false" width="100%" height="100%" viewBox="0 0 200 200" version="1.1" xmlns="http://www.w3.org/2000/svg">
-                               <circle r="90" cx="100" cy="100" fill="transparent" stroke-dasharray="565.48" stroke-dashoffset="0"></circle>
-                               <circle id="bar" r="90" cx="100" cy="100" fill="transparent" stroke-dasharray="565.48" stroke-dashoffset="0"></circle>
-                       </svg>
-               </div>
-               <div class="site-health-progress-label">
-                       <?php _e( 'Results are still loading&hellip;' ); ?>
-               </div>
-       </div>
-
-       <nav class="health-check-tabs-wrapper hide-if-no-js" aria-label="<?php esc_attr_e( 'Secondary menu' ); ?>">
-               <a href="<?php echo esc_url( admin_url( 'site-health.php' ) ); ?>" class="health-check-tab">
-                       <?php
-                       /* translators: Tab heading for Site Health Status page. */
-                       _ex( 'Status', 'Site Health' );
-                       ?>
-               </a>
-
-               <a href="<?php echo esc_url( admin_url( 'site-health.php?tab=debug' ) ); ?>" class="health-check-tab active" aria-current="true">
-                       <?php
-                       /* translators: Tab heading for Site Health Info page. */
-                       _ex( 'Info', 'Site Health' );
-                       ?>
-               </a>
-       </nav>
-</div>
-
-<hr class="wp-header-end">
-
</del><span class="cx" style="display: block; padding: 0 10px"> <div class="notice notice-error hide-if-js">
</span><span class="cx" style="display: block; padding: 0 10px">        <p><?php _e( 'The Site Health check requires JavaScript.' ); ?></p>
</span><span class="cx" style="display: block; padding: 0 10px"> </div>
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -179,6 +132,3 @@
</span><span class="cx" style="display: block; padding: 0 10px">                <?php } ?>
</span><span class="cx" style="display: block; padding: 0 10px">        </div>
</span><span class="cx" style="display: block; padding: 0 10px"> </div>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
-<?php
-require_once ABSPATH . 'wp-admin/admin-footer.php';
</del></span></pre></div>
<a id="trunksrcwpadminsitehealthphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/site-health.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/site-health.php        2021-04-16 17:24:47 UTC (rev 50763)
+++ trunk/src/wp-admin/site-health.php  2021-04-17 01:12:25 UTC (rev 50764)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -6,18 +6,42 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * @subpackage Administration
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-if ( isset( $_GET['tab'] ) && 'debug' === $_GET['tab'] ) {
-       require_once __DIR__ . '/site-health-info.php';
-       return;
-}
-
</del><span class="cx" style="display: block; padding: 0 10px"> /** WordPress Administration Bootstrap */
</span><span class="cx" style="display: block; padding: 0 10px"> require_once __DIR__ . '/admin.php';
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> wp_reset_vars( array( 'action' ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-$title = __( 'Site Health Status' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+$tabs = array(
+       /* translators: Tab heading for Site Health Status page. */
+       ''      => _x( 'Status', 'Site Health' ),
+       /* translators: Tab heading for Site Health Info page. */
+       'debug' => _x( 'Info', 'Site Health' ),
+);
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/**
+ * An associated array of extra tabs for the Site Health navigation bar.
+ *
+ * Add a custom page to the Site Health screen, based on a tab slug and label.
+ * The label you provide will also be used as part of the site title.
+ *
+ * @since 5.8.0
+ *
+ * @param array $tabs An associated array of tab slugs and their label.
+ */
+$tabs = apply_filters( 'site_health_navigation_tabs', $tabs );
+
+$wrapper_classes = array(
+       'health-check-tabs-wrapper',
+       'hide-if-no-js',
+       'tab-count-' . count( $tabs ),
+);
+
+$title = sprintf(
+       // translators: %s: The currently displayed tab.
+       __( 'Site Health %s' ),
+       ( isset( $_GET['tab'] ) ? esc_html( $tabs[ $_GET['tab'] ] ) : esc_html( $tabs[0] ) )
+);
+
</ins><span class="cx" style="display: block; padding: 0 10px"> if ( ! current_user_can( 'view_site_health_checks' ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">        wp_die( __( 'Sorry, you are not allowed to access site health information.' ), '', 403 );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -86,25 +110,87 @@
</span><span class="cx" style="display: block; padding: 0 10px">                </div>
</span><span class="cx" style="display: block; padding: 0 10px">        </div>
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        <nav class="health-check-tabs-wrapper hide-if-no-js" aria-label="<?php esc_attr_e( 'Secondary menu' ); ?>">
-               <a href="<?php echo esc_url( admin_url( 'site-health.php' ) ); ?>" class="health-check-tab active" aria-current="true">
-                       <?php
-                       /* translators: Tab heading for Site Health Status page. */
-                       _ex( 'Status', 'Site Health' );
-                       ?>
-               </a>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ <nav class="<?php echo implode( ' ', $wrapper_classes ); ?>" aria-label="<?php esc_attr_e( 'Secondary menu' ); ?>">
+               <?php
+               $tabs_slice = $tabs;
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                <a href="<?php echo esc_url( admin_url( 'site-health.php?tab=debug' ) ); ?>" class="health-check-tab">
-                       <?php
-                       /* translators: Tab heading for Site Health Info page. */
-                       _ex( 'Info', 'Site Health' );
-                       ?>
-               </a>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         /*
+                * If there are more than 4 tabs, only output the first 3 inline,
+                * the remaining links will be added to a sub-navigation.
+                */
+               if ( count( $tabs ) > 4 ) {
+                       $tabs_slice = array_slice( $tabs, 0, 3 );
+               }
+
+               foreach ( $tabs_slice as $slug => $label ) {
+                       printf(
+                               '<a href="%s" class="health-check-tab %s">%s</a>',
+                               esc_url(
+                                       add_query_arg(
+                                               array(
+                                                       'tab' => $slug,
+                                               ),
+                                               admin_url( 'site-health.php' )
+                                       )
+                               ),
+                               ( isset( $_GET['tab'] ) && $_GET['tab'] === $slug ? 'active' : '' ),
+                               esc_html( $label )
+                       );
+               }
+               ?>
+
+               <?php if ( count( $tabs ) > 4 ) : ?>
+                       <button type="button" class="health-check-tab health-check-offscreen-nav-wrapper" aria-haspopup="true">
+                               <span class="dashicons dashicons-ellipsis"></span>
+                               <span class="screen-reader-text"><?php _e( 'Toggle extra menu items' ); ?></span>
+
+                               <div class="health-check-offscreen-nav">
+                                       <?php
+                                       // Remove the first few entries from the array as being already output.
+                                       $tabs_slice = array_slice( $tabs, 3 );
+                                       foreach ( $tabs_slice as $slug => $label ) {
+                                               printf(
+                                                       '<a href="%s" class="health-check-tab %s">%s</a>',
+                                                       esc_url(
+                                                               add_query_arg(
+                                                                       array(
+                                                                               'tab' => $slug,
+                                                                       ),
+                                                                       admin_url( 'site-health.php' )
+                                                               )
+                                                       ),
+                                                       ( isset( $_GET['tab'] ) && $_GET['tab'] === $slug ? 'active' : '' ),
+                                                       esc_html( $label )
+                                               );
+                                       }
+                                       ?>
+                               </div>
+                       </button>
+               <?php endif; ?>
</ins><span class="cx" style="display: block; padding: 0 10px">         </nav>
</span><span class="cx" style="display: block; padding: 0 10px"> </div>
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> <hr class="wp-header-end">
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+if ( isset( $_GET['tab'] ) && ! empty( $_GET['tab'] ) ) {
+       /**
+        * Output content of a custom Site Health tab.
+        *
+        * This action fires right after the Site Health header, and users are still subject to
+        * the capability checks for the Site Health page to view any custom tabs and their contents.
+        *
+        * @since 5.8.0
+        *
+        * @param string $tab The slug of the tab that was requested.
+        */
+       do_action( 'site_health_tab_content', $_GET['tab'] );
+
+       require_once ABSPATH . 'wp-admin/admin-footer.php';
+       return;
+} else {
+       ?>
+
</ins><span class="cx" style="display: block; padding: 0 10px"> <div class="notice notice-error hide-if-js">
</span><span class="cx" style="display: block; padding: 0 10px">        <p><?php _e( 'The Site Health check requires JavaScript.' ); ?></p>
</span><span class="cx" style="display: block; padding: 0 10px"> </div>
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -193,5 +279,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">        </div>
</span><span class="cx" style="display: block; padding: 0 10px"> </script>
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-<?php
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ <?php
+}
</ins><span class="cx" style="display: block; padding: 0 10px"> require_once ABSPATH . 'wp-admin/admin-footer.php';
</span></span></pre>
</div>
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