用CURL无法获取网易首页，求高手解答。多谢

用CURL无法获取网易首页，求高手解答。。。谢谢
代码如下：

PHP code

$ch = curl_init("http://www.163.com/");$fp = fopen("example_homepage.txt", "w");curl_setopt($ch, CURLOPT_FILE, $fp);curl_setopt($ch, CURLOPT_HEADER, 0);curl_exec($ch);curl_close($ch);fclose($fp);