phpstan changes for level 7

src/Admin/Editor.php

@@ -50,7 +50,9 @@ public function validate_before_save_cb( $data, $post ) {
 			$existing_post = get_post( $post['ID'] );
 
 			// Overwrite new/invalid query with previous working query, or empty
-			$data['post_content'] = $existing_post->post_content;
+			if ( $existing_post ) {
+				$data['post_content'] = $existing_post->post_content;
+			}
 
 			AdminErrors::add_message( $e->getMessage() );
 		}
@@ -286,7 +288,9 @@ public function make_excerpt_column_sortable_in_admin_cb( $columns ) {
 	 * @return array
 	 */
 	public function wp_editor_settings( $settings, $editor_id ) {
-		if ( 'content' === $editor_id && Document::TYPE_NAME === get_current_screen()->post_type ) {
+		$screen = get_current_screen();
+
+		if ( $screen && 'content' === $editor_id && Document::TYPE_NAME === $screen->post_type ) {
 			$settings['tinymce']       = false;
 			$settings['quicktags']     = false;
 			$settings['media_buttons'] = false;

src/Cache/Invalidation.php

@@ -128,7 +128,7 @@ public function init() {
 	/**
 	 * Return a list of ignored meta keys
 	 *
-	 * @return array|null
+	 * @return array
 	 */
 	public static function get_ignored_meta_keys() {
 		if ( null !== self::$ignored_meta_keys ) {
@@ -542,6 +542,10 @@ public function on_transition_post_status_cb( $new_status, $old_status, WP_Post
 
 		$post_type_object = get_post_type_object( $post->post_type );
 
+		if ( ! $post_type_object instanceof \WP_Post_Type ) {
+			return;
+		}
+
 		// If the post type is not public and not publicly queryable
 		// don't track it
 		if ( false === $post_type_object->public && false === $post_type_object->publicly_queryable ) {
@@ -578,8 +582,7 @@ public function on_transition_post_status_cb( $new_status, $old_status, WP_Post
 			$action_type = 'CREATE';
 		}
 
-		$post_type_object = get_post_type_object( $post->post_type );
-		$type_name        = $post_type_object instanceof \WP_Post_Type ? strtolower( $post_type_object->graphql_single_name ) : $post_type_object;
+		$type_name = strtolower( $post_type_object->graphql_single_name );
 
 		// if we create a post
 		// we need to purge lists of the type
@@ -731,6 +734,10 @@ public function on_postmeta_change_cb( $meta_id, $post_id, $meta_key, $meta_valu
 
 		$post_type_object = get_post_type_object( $post->post_type );
 
+		if ( ! $post_type_object instanceof \WP_Post_Type ) {
+			return;
+		}
+
 		// If the post type is not public and not publicly queryable
 		// don't track it
 		if ( false === $post_type_object->public && false === $post_type_object->publicly_queryable ) {