文件权限问题

extend/echowx/WxProgram.php

@@ -81,6 +81,7 @@ class WxProgram
         $fp = fopen(dirname(__FILE__)."/json/access_token.json", "w");
         fwrite($fp, json_encode($res));
         fclose($fp);
+        chmod(dirname(__FILE__)."/json/access_token.json", 0777);
         return $res;
     }