curl_get和curl_post，伪造请求头，绕过防盗链下载文件

//curl-get
    function curl_get($url, $timeout = 10)
    {
        $ch = curl_init();//初始化
        curl_setopt($ch, CURLOPT_URL, $url);//抓取指定网页
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); //禁止服务器端的验证
        //伪装请求来源，绕过防盗
        curl_setopt($ch,CURLOPT_REFERER,"http://www.ding.com");
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);//服务器5秒内没有响应，脚本就会断开连接
        $file_contents = curl_exec($ch);//运行curl
        if (curl_errno($ch)) {
            return curl_error($ch);
        }
        curl_close($ch);
        return $file_contents;
    }
    //http://oss.houdunren.com/lesson_video/水印类/1,水印类简介.mp4
    $url = '要下载文件的地址';
    $filename = '要保存的下载文件名称';
    header("Content-Disposition:attachment;filename=".$filename);
    echo curl_get($url);

function curl_post($url, array $params = array(), $timeout = 5)
{
    $ch = curl_init();//初始化
    curl_setopt($ch, CURLOPT_URL, $url);//抓取指定网页
    curl_setopt($ch, CURLOPT_HEADER, 0);//设置header
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//要求结果为字符串且输出到屏幕上
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
    curl_setopt($ch, CURLOPT_POST, 1);//post提交方式
    curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
    $data = curl_exec($ch);//运行curl
    curl_close($ch);
    return ($data);
}