基于Snoopy的PHP近似完美获取网站编码的代码_PHP

require 'lib/Snoopy.class.php'; 
require 'lib/WebCrawl.class.php';//包含下面代码 
$go=new WebCrawl('http://www.baidu.com'); 
echo $go->getCharset(); 
?> 
 
 代码如下:

class WebCrawl 
{ 
private $url; 
private $request; 
public $charset_arr=array( 
'gb2312', 
'utf-8', 
'big5', 
'gbk', 
'ascii', 
'cp936', 
'ibm037', 
'ibm437', 
'ibm500', 
'asmo-708', 
'dos-720', 
'ibm737', 
'ibm775', 
'ibm850', 
'ibm852', 
'ibm855', 
'ibm857', 
'ibm00858', 
'ibm861', 
'ibm860', 
'dos-862', 
'ibm863', 
'ibm864', 
'ibm865', 
'cp866', 
'ibm869', 
'ibm870', 
'windows-874', 
'cp875', 
'shift_jis', 
'ks_c_5601-1987', 
'ibm1026', 
'ibm01047', 
'ibm01047', 
'ibm01040', 
'ibm01041', 
'ibm01042', 
'ibm01043', 
'ibm01044', 
'ibm01045', 
'ibm01046', 
'ibm01047', 
'ibm01048', 
'ibm01049', 
'utf-16', 
'unicodefffe', 
'windows-1250', 
'windows-1251', 
'windows-1252', 
'windows-1253', 
'windows-1254', 
'windows-1255', 
'windows-1256', 
'windows-1257', 
'windows-1258', 
'johab', 
'macintosh', 
'x-mac-japanese', 
'x-mac-chinesetrad', 
'x-mac-korean', 
'x-mac-arabic', 
'x-mac-hebrew', 
'x-mac-greek', 
'x-mac-cyrillic', 
'x-mac-chinesesimp', 
'x-mac-romanian', 
'x-mac-ukrainian', 
'x-mac-thai', 
'x-mac-ce', 
'x-mac-icelandic', 
'x-mac-turkish', 
'x-mac-croatian', 
'x-chinese-cns', 
'x-cp20001', 
'x-chinese-eten', 
'x-cp20003', 
'x-cp20004', 
'x-cp20005', 
'x-ia5', 
'x-ia5-german', 
'x-ia5-swedish', 
'x-ia5-norwegian', 
'us-ascii', 
'x-cp20261', 
'x-cp20269', 
'ibm273', 
'ibm277', 
'ibm278', 
'ibm280', 
'ibm284', 
'ibm285', 
'ibm290', 
'ibm420', 
'ibm423', 
'ibm424', 
'x-ebcdic-koreanextended', 
'ibm-thai', 
'koi8-r', 
'ibm871', 
'ibm880', 
'ibm905', 
'ibm00924', 
'x-cp20936', 
'x-cp20949', 
'cp1025', 
'koi8-u', 
'iso-8859-1', 
'iso-8859-2', 
'iso-8859-3', 
'iso-8859-4', 
'iso-8859-5', 
'iso-8859-6', 
'iso-8859-7', 
'iso-8859-8', 
'iso-8859-9', 
'iso-8859-13', 
'iso-8859-15', 
'x-europa', 
'iso-8859-8-i', 
'iso-2022-jp', 
'csiso2022jp', 
'iso-2022-jp', 
'iso-2022-kr', 
'x-cp50227', 
'euc-jp', 
'euc-cn', 
'euc-kr', 
'hz-gb-2312', 
'gb18030', 
'x-iscii-de', 
'x-iscii-be', 
'x-iscii-ta', 
'x-iscii-te', 
'x-iscii-as', 
'x-iscii-or', 
'x-iscii-ka', 
'x-iscii-ma', 
'x-iscii-gu', 
'x-iscii-pa', 
'utf-7', 
'utf-32', 
'utf-32be' 
); 
public function __construct($url) 
{ 
$this->url=$url; 
} 
//打开网站 
private function open($url) 
{ 
if($this->request!==null) 
{ 
if($this->request->status==200) 
{ 
return true; 
} 
else 
{ 
return false; 
} 
} 
else 
{ 
$this->request=new Snoopy(); 
$this->request->fetch($url); 
if($this->request->status==200) 
{ 
$this->request->results=strtolower($this->request->results); 
$charset=$this->getCharset(); 
if($charset!="utf-8") 
{ 
if($charset=="windows-1252") 
{ 
$this->request->results=$this->uni_decode($this->request->results); 
} 
else 
{ 
$this->request->results=mb_convert_encoding($this->request->results,"UTF-8",$charset); 
} 
} 
return true; 
} 
else 
{ 
return false; 
} 
} 
} 
//获取网站title,keywords,description 
public function getWebinfo() 
{ 
$info=array( 
'title'=>'', 
'keywords'=>'', 
'desc'=>'', 
'ip'=>'' 
); 
if(!$this->open($this->url)){return $info;exit;} 
// print_r($this->request->results);exit; 
preg_match('/