diff --git a/src/FFIExtend.php b/src/FFIExtend.php
index f28809e..264eb1f 100644
--- a/src/FFIExtend.php
+++ b/src/FFIExtend.php
@@ -61,6 +61,7 @@ class FFIExtend
 
     public function __construct()
     {
+        defined('PHP_DLL_FILE_PATH') || define('PHP_DLL_FILE_PATH', false);
         if(self::$ffi === null) {
             $this->versionMacro();
             $this->initPhpApi();
@@ -136,7 +137,7 @@ private function initPhpApi()
             self::$ffi = FFI::cdef($code, $phpDll);
         } else {
             $code = str_replace('ZEND_FASTCALL', '__attribute__((fastcall))', $code);
-            if(defined('PHP_DLL_FILE_PATH')) {
+            if(PHP_DLL_FILE_PATH) {
                 self::$ffi = FFI::cdef($code, PHP_DLL_FILE_PATH);
             } else {
                 self::$ffi = FFI::cdef($code);
@@ -148,7 +149,7 @@ private function initPhpApi()
 
     protected function findPhpDll()
     {
-        if(defined('PHP_DLL_FILE_PATH')) {
+        if(PHP_DLL_FILE_PATH) {
             return PHP_DLL_FILE_PATH;
         }
         $f = '/php7' . (PHP_ZTS ? 'ts' : '') . '.dll';
diff --git a/src/ReflectionCFunction.php b/src/ReflectionCFunction.php
index 4a1f2c1..08838bc 100644
--- a/src/ReflectionCFunction.php
+++ b/src/ReflectionCFunction.php
@@ -21,12 +21,14 @@ class ReflectionCFunction extends FFIExtend implements Reflector
     private $name = '';
     private $ffi = null;
     private $type = null;
+    private static $preName;
 
     public function __construct(FFI $ffi, $name)
     {
         parent::__construct();
         $this->ffi = $ffi;
         $this->name = $name;
+        self::$preName = $name;
         $sym = $this->findSymobl($ffi, $name, self::ZEND_FFI_SYM_FUNC);
         if(!$this->isNull($sym)) {
             $this->type = $this->ZEND_FFI_TYPE($sym[0]->type)[0];
@@ -42,7 +44,7 @@ public function getName()
 
     public static function export()
     {
-        return $this->name;
+        return self::$preName;
     }
 
     public function getClosure()