diff --git a/application/common/library/token/Driver.php b/application/common/library/token/Driver.php
index 03463024..4d53b6b4 100644
--- a/application/common/library/token/Driver.php
+++ b/application/common/library/token/Driver.php
@@ -76,6 +76,7 @@ abstract class Driver
     protected function getEncryptedToken($token)
     {
         $config = \think\Config::get('token');
+        $token = $token ?? ''; // 为兼容 php8
         return hash_hmac($config['hashalgo'], $token, $config['key']);
     }
 
diff --git a/application/common/library/token/driver/Redis.php b/application/common/library/token/driver/Redis.php
index 0aa0caaa..ecf27502 100644
--- a/application/common/library/token/driver/Redis.php
+++ b/application/common/library/token/driver/Redis.php
@@ -60,6 +60,7 @@ class Redis extends Driver
     protected function getEncryptedToken($token)
     {
         $config = \think\Config::get('token');
+        $token = $token ?? ''; // 为兼容 php8
         return $this->options['tokenprefix'] . hash_hmac($config['hashalgo'], $token, $config['key']);
     }