private function get_biz_sign($bizObj, $paySignKey) { foreach ($bizObj as $k => $v) { $bizParameters[strtolower($k)] = $v; } try { if ($paySignKey == "") { throw new Exception("APPKEY为空!" . "<br>"); } $bizParameters["appkey"] = $paySignKey; ksort($bizParameters); $bizString = weixin_util::formatBizQueryParaMap($bizParameters, false); return sha1($bizString); } catch (Exception $e) { die($e->getMessage()); } }