php curl通过连接获取标题

<?php
/****/
//Gary xu
//[email protected]
/****/
namespace Xuyaoxiang;
 
    class Snoopy {
     
    public $pattern_array=array(
    'title'=>'/<title>(\s*.*)<\/title>/i',
    'description'=>'/<meta +name="?[d|D]escription"? +content="(.*)" *\/?>/',
    'charset'=>'/charset=\"?([\w-]+)\"?/i',
    );
     
    public $user_agent='Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.110 Safari/537.36'; //模拟浏览器头部数据
     
    public $target_code="utf-8"; //目标编码
     
    public $url;
     
    public $data;
     
    public $pattern_key;
     
    function __construct($url)
    {
            $this->url=$url;
    }
     
    public function set_pattern($key,$val)
    {
        $this->pattern_array[$key]=$val;
    }
     
     
     
    function get_content($pattern_key)
    {
        $this->pattern_key=$pattern_key;
         
        if($this->pattern_key==''){return false;}
         
        $this->curl_get_data();
         
        if($this->data==false){return false;}
         
        $charset=$this->get_charset();
         
        $this->check_charset($charset);
         
        $content=$this->get_key_content();
         
        return  trim($content[1]);
    }
     
     
            function curl_get_data()
        {
                $curl=curl_init();
                // 设置你需要抓取的URL
             
                curl_setopt($curl, CURLOPT_URL, $this->url);
         
                // 设置header
                curl_setopt($curl, CURLOPT_HEADER, 0);
                 
                // 设置cURL 参数，要求结果保存到字符串中还是输出到屏幕上。
                curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
                 
                curl_setopt($curl, CURLOPT_USERAGENT, $this->user_agent);
             
                // 运行cURL，请求网页
                 
                $this->data = curl_exec($curl); 
                 
                curl_close($curl);
        }
         
        function check_charset($page_charset)
        {
             if($page_charset!=$this->target_code)
             {
                $this->data=mb_convert_encoding($this->data,$this->target_code,$page_charset);
             }
        }
         
        function get_key_content()
        {
            preg_match($this->pattern_array[$this->pattern_key],$this->data,$content);
            return $content;   
        }
         
        function get_charset()
        {
            preg_match($this->pattern_array['charset'],$this->data,$reg_charset);
            return $page_charset=strtolower($reg_charset[1]);  
        }
}
 
 

?>