/*** 發送HTTP請求方法，目前只支持CURL發送請求* @param string $url  請求URL* @param array $params 請求參數* @param string $method 請求方法GET/POST* @return array $data  響應數據*/protected function http($url, $params, $method = 'GET', $header = array(), $multi = false) {    $opts = array(CURLOPT_TIMEOUT => 30, CURLOPT_RETURNTRANSFER => 1, CURLOPT_SSL_VERIFYPEER => false, CURLOPT_SSL_VERIFYHOST => false, CURLOPT_HTTPHEADER => $header);    /* 根據請求類型設置特定參數 */    switch(strtoupper($method)) {      case 'GET' :        $opts[CURLOPT_URL] = $url . '&' . http_build_query($params);        dump($opts[CURLOPT_URL]);        break;      case 'POST' :        //判斷是否傳輸文件        $params = $multi ? $params : http_build_query($params);        $opts[CURLOPT_URL] = $url;        dump($opts[CURLOPT_URL]);        $opts[CURLOPT_POST] = 1;        $opts[CURLOPT_POSTFIELDS] = $params;        break;      default :        throw new Exception('不支持的請求方式！');    }    /* 初始化并執行curl請求 */    $ch = curl_init();    curl_setopt_array($ch, $opts);    $data = curl_exec($ch);    $error = curl_error($ch);    curl_close($ch);    if ($error)      throw new Exception('請求發生錯誤：' . $error);    return $data;}