php curl 模拟登录并获取数据实例详解

//模拟登录 
function login_post($url, $cookie, $post) { 
  $curl = curl_init();//初始化curl模块 
  curl_setopt($curl, CURLOPT_URL, $url);//登录提交的地址 
  curl_setopt($curl, CURLOPT_HEADER, 0);//是否显示头信息 
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, 0);//是否自动显示返回的信息 
  curl_setopt($curl, CURLOPT_COOKIEJAR, $cookie); //设置Cookie信息保存在指定的文件中 
  curl_setopt($curl, CURLOPT_POST, 1);//post方式提交 
  curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($post));//要提交的信息 
  curl_exec($curl);//执行cURL 
  curl_close($curl);//关闭cURL资源，并且释放系统资源 
} 

//登录成功后获取数据 
function get_content($url, $cookie) { 
  $ch = curl_init(); 
  curl_setopt($ch, CURLOPT_URL, $url); 
  curl_setopt($ch, CURLOPT_HEADER, 0); 
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
  curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie); //读取cookie 
  $rs = curl_exec($ch); //执行cURL抓取页面内容 
  curl_close($ch); 
  return $rs; 
} 

//设置post的数据 
$post = array ( 
  'email' => 'oschina账户', 
  'pwd' => 'oschina密码', 
  'goto_page' => '/my', 
  'error_page' => '/login', 
  'save_login' => '1', 
  'submit' => '现在登录' 
); 
 //登录地址 $url = "http://m.oschina.net/action/user/login"; //设置cookie保存路径 $cookie = dirname(__FILE__) . '/cookie_oschina.txt'; //登录后要获取信息的地址 $url2 = "http://m.oschina.net/my"; //模拟登录 
login_post($url, $cookie, $post); //获取登录页的信息 $content = get_content($url2, $cookie); //删除cookie文件 
@ unlink($cookie); //匹配页面信息 $preg = "/<td class='portrait'>(.*)<\/td>/i"; 
preg_match_all($preg, $content, $arr); $str = $arr[1][0]; //输出内容 echo $str;