PHP adjustment interface Sign verification

 $v) {
            if ($k == 'sign' || $k == 'ts') {
                continue;
            }
            if (is_array($v)) {
                $v = json_encode($v);
            }
            $strTmp = trim($k) . '=' . trim($v);
            $arrSign[$strTmp] = $strTmp;
        }
        $strSign = implode('&', $arrSign);
        $sign = md5($strSign.$ts.$token);
        return $sign;
    }

}

   $params = $request->all();  
if(!isset($params['sign'])){  
    return $this->failsmsg('缺少sign校验参数');  
}  
$mySign = SignUtil::getCheckSign($params);  
if($params['sign'] != $mySign){  
    return $this->failsmsg('sign校验失败');  
}