PDO设置字符集

 <?php
 header("content-type:text/html;charset=GBK");
 class CurlClass
 {
     protected $_pdo;
     public function __construct()
     {
         $this->_pdo =new PDO("mysql:host=127.0.0.1;dbname=student","root","root");
         $this->_pdo->query("set names gbk");
     }
     //curl
     public function get($url)
     {
         $ch = curl_init();
         curl_setopt($ch, CURLOPT_URL, "$url");
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
         curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,10);
         curl_setopt($ch, CURLOPT_HEADER, 0);
         $output = curl_exec($ch);
         curl_close($ch);
         return $output;
     }
     //规则
     public function name($url)
     {
         $data = $this->get($url);
         $zheng_ze='#<li>\s*<a href="(.*?)".*?>(.*?)<.*\s*<span>.*?</span>\s*</li>#';
         preg_match_all($zheng_ze,$data,$arr);
         $arr=array_slice($arr,1);
         foreach($arr[0] as $k=>$v)
         {
             $ww=[
                 'title'=>$arr[1][$k],
                 'content'=>$arr[0][$k]
             ];
             $sql=$this->_pdo->exec("insert into user VALUES (null,'{$ww['title']}','{$ww['content']}')");
         }
         if($sql)
         {
             echo "添加成功";
         }

     }

 }