diff --git a/src/Constrict/Message.php b/src/Constrict/Message.php
index 0641e6b..df90e56 100644
--- a/src/Constrict/Message.php
+++ b/src/Constrict/Message.php
@@ -185,7 +185,7 @@ class Message extends Component implements MessageInterface
 		if (isset($this->headers[$name])) {
 			$header = $this->headers[$name];
 
-			return is_string($header) ? [$header] : $header;
+			return \is_string($header) ? [$header] : $header;
 		}
 		return [];
 	}
@@ -212,7 +212,7 @@ class Message extends Component implements MessageInterface
 	public function getHeaderLine(string $name): string
 	{
 		// TODO: Implement getHeaderLine() method.
-		return implode(';', $this->getHeader($name));
+		return \implode(';', $this->getHeader($name));
 	}
 
 
diff --git a/src/Handler.php b/src/Handler.php
index c56b40d..94f65b5 100644
--- a/src/Handler.php
+++ b/src/Handler.php
@@ -98,6 +98,8 @@ class Handler implements RequestHandlerInterface
     public function handle(ServerRequestInterface $request): ResponseInterface
     {
         $data = call_user_func($this->handler, ...$this->parameter);
+
+        /** 根据返回类型 */
         return $this->format->call($data);
     }
 
diff --git a/src/SwooleHttpResponseEmitter.php b/src/SwooleHttpResponseEmitter.php
index 145dbcf..2eac0e7 100644
--- a/src/SwooleHttpResponseEmitter.php
+++ b/src/SwooleHttpResponseEmitter.php
@@ -97,7 +97,7 @@ class SwooleHttpResponseEmitter implements ResponseEmitterInterface
         }
         $response->header('Run-Time', $this->getRunTime($request));
         $response->header('Server', 'swoole');
-        $response->header('Swoole-Version', swoole_version());
+        $response->header('Swoole-Version', \swoole_version());
     }