PHP发送Curl请求函数

/**
 * 发送Curl请求
 * @param string $url 发送地址
 * @param array $data post提交参数；为空时，为get提交
 * @param array $header HTTP头部设置
 * @return string 返回接收到的字符串
 */
function send_curl_request($url, $data = [], $header = [])
{
    try {
        $curlRes = curl_init();
        curl_setopt($curlRes, CURLOPT_URL, $url);
        curl_setopt($curlRes, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curlRes, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($curlRes, CURLOPT_CONNECTTIMEOUT, 10);
        curl_setopt($curlRes, CURLOPT_TIMEOUT, 30);
        curl_setopt($curlRes, CURLOPT_HEADER, false);
        curl_setopt($curlRes, CURLOPT_RETURNTRANSFER, true);
        if ($header) {
            curl_setopt($curlRes, CURLOPT_HTTPHEADER, $header);
        }
        if ($data) {
            // $data 是数组时，Content-Type 头将会被设置成 multipart/form-data
            // $data 是 URL-encoded 字符串时，
            // Content-Type 头将会被设置成 application/x-www-form-urlencoded
            curl_setopt($curlRes, CURLOPT_POST, true);
            curl_setopt($curlRes, CURLOPT_POSTFIELDS, $data);
        }
        $output = curl_exec($curlRes);
        if (curl_errno($curlRes) != 0) {
            /*$message = '[' . curl_errno($curlRes) . '] - ' . curl_error($curlRes);
            echo $message;
            exit;*/

            $output = '';
        }
        curl_close($curlRes);
    } catch (\Exception $e) {
        /*$message = '[' . $e->getCode() . '] - ' . $e->getMessage() . PHP_EOL;
        $message .= '[' . $e->getLine() . '] - ' . $e->getFile();
        echo $message;
        exit;*/

        return '';
    }

    return $output;
}