利用PHP抓取百度阅读的方法示例

<?phpclass BaiduYuedu { protected $bookId; protected $bookToken; protected $cookie; protected $result; public function __construct($bookId, $bookToken, $cookie){  $this->bookId = $bookId;  $this->bookToken = $bookToken;  $this->cookie = $cookie; } public static function parseNode($node){  $str = '';  if(is_string($node['c'])){   $str .= $node['c'];  }else if(is_array($node['c'])){   foreach($node['c'] as $d){    $str .= self::parseNode($d);   }  }  switch($node['t']){   case 'h2':    $str .= "/n/n";    break;   case 'br':   case 'div':   case 'p':    $str .= "/n";    break;   case 'img':   case 'span':    break;   case 'obj':    $tmp = '(' . self::parseNode($node['data'][0]) . ')';    $str .= str_replace("/n", '', $tmp);    break;   default:    trigger_error('Unkown type:'.$node['t'], E_USER_WARNING);    break;  }  return $str; } public function get($page = 1){  echo "getting page {$page}.../n";  $ch = curl_init();  $url = sprintf('http://wenku.baidu.com/content/%s/?m=%s&type=json&cn=%d', $this->bookId, $this->token, $page);  curl_setopt_array($ch, array(   CURLOPT_URL   => $url,   CURLOPT_RETURNTRANSFER => 1,   CURLOPT_HEADER   => 0,   CURLOPT_HTTPHEADER  => array('Cookie: '. $this->cookie)  ));  $ret = json_decode(curl_exec($ch), true);  curl_close($ch);  $str = '';  if(!empty($ret)){   $str .= self::parseNode($ret);   $str .= $this->get($page + 1);  }  return $str; } public function start(){  $this->result = $this->get(); } public function getResult(){  return $this->result; } public function saveTo($path){  if(empty($this->result)){   trigger_error('Result is empty', E_USER_ERROR);   return;  }  file_put_contents($path, $this->result);  echo "save to {$path}/n"; }}//使用示例$yuedu = new BaiduYuedu('49422a3769eae009581becba', '8ed1dedb240b11bf0731336eff95093f', '你的百度域cookie');$yuedu->start();$yuedu->saveTo('result.txt');