Use isset() instead of in_array() over array_keys()

src/wp-admin/includes/class-theme-installer-skin.php

@@ -248,7 +248,7 @@ private function do_overwrite() {
 
 		$is_invalid_parent = false;
 		if ( ! empty( $new_theme_data['Template'] ) ) {
-			$is_invalid_parent = ! in_array( $new_theme_data['Template'], array_keys( $all_themes ), true );
+			$is_invalid_parent = ! isset( $all_themes[ $new_theme_data['Template'] ] );
 		}
 
 		$rows = array(

src/wp-admin/includes/dashboard.php

@@ -568,11 +568,13 @@ function wp_dashboard_quick_press( $message = false, $notice_type = 'error' ) {
 			$post->post_title = ''; // Remove the auto draft title.
 		}
 	} else {
-		$post    = get_default_post_to_edit( 'post', true );
-		$user_id = get_current_user_id();
+		$post            = get_default_post_to_edit( 'post', true );
+		$user_id         = get_current_user_id();
+		$user_blogs      = get_blogs_of_user( $user_id );
+		$current_blog_id = get_current_blog_id();
 
 		// Don't create an option if this is a super admin who does not belong to this site.
-		if ( in_array( get_current_blog_id(), array_keys( get_blogs_of_user( $user_id ) ), true ) ) {
+		if ( isset( $user_blogs[ $current_blog_id ] ) ) {
 			update_user_option( $user_id, 'dashboard_quick_press_last_post_id', (int) $post->ID ); // Save post_ID.
 		}
 	}

src/wp-admin/nav-menus.php

@@ -196,7 +196,7 @@
 
 					// If this menu item is a child of the previous.
 					if ( ! empty( $menu_item_data['menu_item_parent'] )
-						&& in_array( (int) $menu_item_data['menu_item_parent'], array_keys( $dbids_to_orders ), true )
+						&& isset( $dbids_to_orders[ (int) $menu_item_data['menu_item_parent'] ] )
 						&& isset( $orders_to_dbids[ $dbids_to_orders[ $menu_item_id ] - 1 ] )
 						&& ( (int) $menu_item_data['menu_item_parent'] === $orders_to_dbids[ $dbids_to_orders[ $menu_item_id ] - 1 ] )
 					) {
@@ -230,7 +230,7 @@
 							) {
 								$_possible_parent_id = (int) get_post_meta( $orders_to_dbids[ $dbids_to_orders[ $parent_db_id ] - 1 ], '_menu_item_menu_item_parent', true );
 
-								if ( in_array( $_possible_parent_id, array_keys( $dbids_to_orders ), true ) ) {
+								if ( isset( $dbids_to_orders[ $_possible_parent_id ] ) ) {
 									$menu_item_data['menu_item_parent'] = $_possible_parent_id;
 								} else {
 									$menu_item_data['menu_item_parent'] = 0;
@@ -256,7 +256,7 @@
 						// Else this menu item is not a child of the previous.
 					} elseif ( empty( $menu_item_data['menu_order'] )
 						|| empty( $menu_item_data['menu_item_parent'] )
-						|| ! in_array( (int) $menu_item_data['menu_item_parent'], array_keys( $dbids_to_orders ), true )
+						|| ! isset( $dbids_to_orders[ (int) $menu_item_data['menu_item_parent'] ] )
 						|| empty( $orders_to_dbids[ $dbids_to_orders[ $menu_item_id ] - 1 ] )
 						|| $orders_to_dbids[ $dbids_to_orders[ $menu_item_id ] - 1 ] !== (int) $menu_item_data['menu_item_parent']
 					) {

src/wp-includes/block-editor.php

@@ -184,7 +184,7 @@ function get_default_block_editor_settings() {
 	}
 
 	$default_size       = get_option( 'image_default_size', 'large' );
-	$image_default_size = in_array( $default_size, array_keys( $image_size_names ), true ) ? $default_size : 'large';
+	$image_default_size = isset( $image_size_names[ $default_size ] ) ? $default_size : 'large';
 
 	$image_dimensions = array();
 	$all_sizes        = wp_get_registered_image_subsizes();

src/wp-includes/link-template.php

@@ -3993,7 +3993,7 @@ function get_dashboard_url( $user_id = 0, $path = '', $scheme = 'admin' ) {
 	} else {
 		$current_blog = get_current_blog_id();
 
-		if ( $current_blog && ( user_can( $user_id, 'manage_network' ) || in_array( $current_blog, array_keys( $blogs ), true ) ) ) {
+		if ( $current_blog && ( user_can( $user_id, 'manage_network' ) || isset( $blogs[ $current_blog ] ) ) ) {
 			$url = admin_url( $path, $scheme );
 		} else {
 			$active = get_active_blog_for_user( $user_id );

src/wp-includes/media.php

@@ -114,7 +114,7 @@ function image_constrain_size_for_editor( $width, $height, $size = 'medium', $co
 		if ( (int) $content_width > 0 ) {
 			$max_width = min( (int) $content_width, $max_width );
 		}
-	} elseif ( ! empty( $_wp_additional_image_sizes ) && in_array( $size, array_keys( $_wp_additional_image_sizes ), true ) ) {
+	} elseif ( isset( $_wp_additional_image_sizes[ $size ] ) ) {
 		$max_width  = (int) $_wp_additional_image_sizes[ $size ]['width'];
 		$max_height = (int) $_wp_additional_image_sizes[ $size ]['height'];
 		// Only in admin. Assume that theme authors know what they're doing.

src/wp-includes/sitemaps.php

@@ -116,8 +116,12 @@ function get_sitemap_url( $name, $subtype_name = '', $page = 1 ) {
 		return false;
 	}
 
-	if ( $subtype_name && ! in_array( $subtype_name, array_keys( $provider->get_object_subtypes() ), true ) ) {
-		return false;
+	if ( $subtype_name ) {
+		$object_subtypes = $provider->get_object_subtypes();
+
+		if ( ! isset( $object_subtypes[ $subtype_name ] ) ) {
+			return false;
+		}
 	}
 
 	$page = absint( $page );