curl_setopt($curl, CURLOPT_COOKIEFILE, $cookie_file);是读取cookie文件
curl_setopt($curl, CURLOPT_COOKIEJAR, $cookie_file);是保存cookie文件
模拟登陆成功后你没保存cookie,后面的内容当然获取不到
$curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_HEADER, false);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($curl, CURLOPT_POSTFIELDS, $post);
    curl_setopt($curl, CURLOPT_COOKIEFILE, $cookie_file);
    curl_setopt($curl, CURLOPT_COOKIEJAR, $cookie_file);
    $result=curl_exec($curl);
    curl_close($curl);