From 491e07fbf8b0f3451b6476ac7f5881d96fcb72b9 Mon Sep 17 00:00:00 2001
From: hawk <317642196@qq.com>
Date: Wed, 15 Dec 2021 08:39:35 +0800
Subject: [PATCH] Update User.php

php8.1 test error handle
---
 Behavioral/Observer/User.php | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Behavioral/Observer/User.php b/Behavioral/Observer/User.php
index 79a13f7..f42d0d4 100644
--- a/Behavioral/Observer/User.php
+++ b/Behavioral/Observer/User.php
@@ -22,23 +22,23 @@ class User implements SplSubject
         $this->observers = new SplObjectStorage();
     }
 
-    public function attach(SplObserver $observer)
+    public function attach(SplObserver $observer): void
     {
         $this->observers->attach($observer);
     }
 
-    public function detach(SplObserver $observer)
+    public function detach(SplObserver $observer): void
     {
         $this->observers->detach($observer);
     }
 
-    public function changeEmail(string $email)
+    public function changeEmail(string $email): void
     {
         $this->email = $email;
         $this->notify();
     }
 
-    public function notify()
+    public function notify(): void
     {
         /** @var SplObserver $observer */
         foreach ($this->observers as $observer) {