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public function curlData($url, $params = array() , $headers = array()) {    $ch = curl_init();        curl_setopt($ch, CURLOPT_URL, $url);        if (!empty($params)) {            curl_setopt($ch, CURLOPT_POST, true);            curl_setopt($ch, CURLOPT_POSTFIELDS, $params);        }        if (!empty($headers)) curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);        $txt = curl_exec($ch);        if (curl_errno($ch)) {            trace(curl_error($ch) , '升级通知出错', 'NOTIC', true);                        return false;        }        curl_close($ch);        $ret = json_decode($txt, true);        if (!$ret) {            trace('接口[' . $url . ']返回格式不正确', '升级通知出错', 'NOTIC', true);                        return false;        }                return $ret;}

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