php生成簽名

// 生成簽名
private function makeSignature($params)
{
    foreach ($params as $key=>$value){
        $arr[$key] = $key;
    }

    sort($arr); //字典排序的作用就是防止因為參數順序不一致而導致下面拼接加密不同
    $str = "";
    foreach ($arr as $k => $v) {
        $str = $str.$arr[$k].$params[$v];
    }

    $resStr=$str.$secret;
    $signature = strtoupper(sha1($resStr));
    $params['signature'] = $signature;
    return $params;
}

// 簽名驗證
public function validSignature($params)
{
    $signature = $params['signature'];

    unset($params['signature']);
    $newSign = $this->makeSignature($params);
    if($signature == $newSign['signature']){
        return true;
    } else {
        return false;
    }
}