curl学习 - 用cURL登陆 并下载个人空间页面

仿慕课网上的教程，但是没有成功

$data = "username=用户名&password=密码";
$curlobj = curl_init();
curl_setopt($curlobj,CURLOPT_URL,"http://www.***.cn/index.php/Home/Public/dologin");  //设置访问的url地址
curl_setopt($curlobj,CURLOPT_RETURNTRANSFER,true);  //执行之后不直接打印出来

//cookie相关设置，这部分设置需要在所有回话开始之前设置
date_default_timezone_set("PRC");   //使用cookie时，必须先
curl_setopt($curlobj,CURLOPT_COOKIESESSION,TRUE);
curl_setopt($curlobj,CURLOPT_COOKIEFILE,"cookiefile");
curl_setopt($curlobj,CURLOPT_COOKIEJAR,"cookiefile");
curl_setopt($curlobj,CURLOPT_COOKIE,session_name() . "=" . session_id());
curl_setopt($curlobj,CURLOPT_HEADER,0);
curl_setopt($curlobj,CURLOPT_FOLLOWLOCATION,1);  //让cURL支持页面跳转

curl_setopt($curlobj,CURLOPT_POST,1);
curl_setopt($curlobj,CURLOPT_POSTFIELDS,$data);
curl_setopt($curlobj,CURLOPT_HTTPHEADER,array("application/x-www-form-urlencoded;charset=utf-8","Content-length: ".strlen($data))); 
curl_exec($curlobj);  

curl_setopt($curlobj,CURLOPT_URL,"http://www.***.cn/index.php/Member/Posts/business");
curl_setopt($curlobj,CURLOPT_POST,0);
curl_setopt($curlobj,CURLOPT_HTTPHEADER,array("Content-type:text/xml"));
$output = curl_exec($curlobj);
curl_close($curlobj);
echo $output;

下面这一段成功登陆

$cookie_file    =    tempnam("./temp","cookie");
$login_url        =    "http://www.***.cn/index.php/Home/Public/dologin";
$post_fields    =    "username=用户名&password=密码";

$ch = curl_init($login_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);
curl_setopt($ch,CURLOPT_FOLLOWLOCATION,1);  //让cURL支持页面跳转
curl_exec($ch);
curl_close($ch);


$url="http://www.***.cn/index.php/Member/Posts/business";
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
$contents = curl_exec($ch);
echo $contents;
curl_close($ch);