--- a/wp/wp-admin/includes/class-wp-plugin-install-list-table.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-admin/includes/class-wp-plugin-install-list-table.php	Wed Sep 21 18:19:35 2022 +0200
@@ -47,15 +47,19 @@
 		$plugin_info = get_site_transient( 'update_plugins' );
 		if ( isset( $plugin_info->no_update ) ) {
 			foreach ( $plugin_info->no_update as $plugin ) {
-				$plugin->upgrade          = false;
-				$plugins[ $plugin->slug ] = $plugin;
+				if ( isset( $plugin->slug ) ) {
+					$plugin->upgrade          = false;
+					$plugins[ $plugin->slug ] = $plugin;
+				}
 			}
 		}
 
 		if ( isset( $plugin_info->response ) ) {
 			foreach ( $plugin_info->response as $plugin ) {
-				$plugin->upgrade          = true;
-				$plugins[ $plugin->slug ] = $plugin;
+				if ( isset( $plugin->slug ) ) {
+					$plugin->upgrade          = true;
+					$plugins[ $plugin->slug ] = $plugin;
+				}
 			}
 		}
 
@@ -101,13 +105,16 @@
 		if ( 'search' === $tab ) {
 			$tabs['search'] = __( 'Search Results' );
 		}
+
 		if ( 'beta' === $tab || false !== strpos( get_bloginfo( 'version' ), '-' ) ) {
 			$tabs['beta'] = _x( 'Beta Testing', 'Plugin Installer' );
 		}
+
 		$tabs['featured']    = _x( 'Featured', 'Plugin Installer' );
 		$tabs['popular']     = _x( 'Popular', 'Plugin Installer' );
 		$tabs['recommended'] = _x( 'Recommended', 'Plugin Installer' );
 		$tabs['favorites']   = _x( 'Favorites', 'Plugin Installer' );
+
 		if ( current_user_can( 'upload_plugins' ) ) {
 			// No longer a real tab. Here for filter compatibility.
 			// Gets skipped in get_views().
@@ -210,7 +217,14 @@
 		 * Filters API request arguments for each Add Plugins screen tab.
 		 *
 		 * The dynamic portion of the hook name, `$tab`, refers to the plugin install tabs.
-		 * Default tabs include 'featured', 'popular', 'recommended', 'favorites', and 'upload'.
+		 *
+		 * Possible hook names include:
+		 *
+		 *  - `install_plugins_table_api_args_favorites`
+		 *  - `install_plugins_table_api_args_featured`
+		 *  - `install_plugins_table_api_args_popular`
+		 *  - `install_plugins_table_api_args_recommended`
+		 *  - `install_plugins_table_api_args_upload`
 		 *
 		 * @since 3.7.0
 		 *
@@ -427,7 +441,7 @@
 		$a = $plugin_a->$orderby;
 		$b = $plugin_b->$orderby;
 
-		if ( $a == $b ) {
+		if ( $a === $b ) {
 			return 0;
 		}
 
@@ -472,7 +486,7 @@
 			}
 
 			// Display the group heading if there is one.
-			if ( isset( $plugin['group'] ) && $plugin['group'] != $group ) {
+			if ( isset( $plugin['group'] ) && $plugin['group'] !== $group ) {
 				if ( isset( $this->groups[ $plugin['group'] ] ) ) {
 					$group_name = $this->groups[ $plugin['group'] ];
 					if ( isset( $plugins_group_titles[ $group_name ] ) ) {
@@ -493,6 +507,7 @@
 
 				$group = $plugin['group'];
 			}
+
 			$title = wp_kses( $plugin['name'], $plugins_allowedtags );
 
 			// Remove any HTML from the description.
@@ -698,7 +713,7 @@
 					<h3>
 						<a href="<?php echo esc_url( $details_link ); ?>" class="thickbox open-plugin-details-modal">
 						<?php echo $title; ?>
-						<img src="<?php echo esc_attr( $plugin_icon_url ); ?>" class="plugin-icon" alt="" />
+						<img src="<?php echo esc_url( $plugin_icon_url ); ?>" class="plugin-icon" alt="" />
 						</a>
 					</h3>
 				</div>
@@ -743,7 +758,7 @@
 							_nx( '%s+ Million', '%s+ Million', $active_installs_millions, 'Active plugin installations' ),
 							number_format_i18n( $active_installs_millions )
 						);
-					} elseif ( 0 == $plugin['active_installs'] ) {
+					} elseif ( 0 === $plugin['active_installs'] ) {
 						$active_installs_text = _x( 'Less Than 10', 'Active plugin installations' );
 					} else {
 						$active_installs_text = number_format_i18n( $plugin['active_installs'] ) . '+';