php的curl问题，登录51cto

Question

$cookie_file = tempnam('./temp','cookie.txt');
$post = 'email=xxxxx&passwd=xxxxx&reback=&button.x=42&button.y=12';
$url = 'http://home.51cto.com/index.php?s=/Index/doLogin'; $ch = curl_init($url);
curl_setopt($ch,CURLOPT_HEADER,0); 
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1); 
curl_setopt($ch,CURLOPT_POST,1); 
curl_setopt($ch,CURLOPT_COOKIEJAR,$cookie_file); 
curl_setopt($ch,CURLOPT_POSTFIELDS,$post); 

curl_exec($ch);
curl_close($ch);


$url = 'http://home.51cto.com';
$ch = curl_init($url);
curl_setopt($ch,CURLOPT_HEADER,0); 
curl_setopt($ch,CURLOPT_RETURNTRANSFER,0); 
curl_setopt($ch,CURLOPT_COOKIEFILE,$cookie_file); 

curl_exec($ch);
curl_close($ch);
不知道哪里不对，求高人解答

Answer 1

第一节少了
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);