Extraer código HTML de un sitio web

get_source

function get_source($url,$quitar,$show_headers=0)  
 {  if(preg_match('!^http://!',$url))  
    $url=substr($url,7,strlen($url)); 
    if($start=strpos($url,'/'))  $uri=substr($url,$start,strlen($url));  
    else  $uri='';  
    $fp= @fsockopen($url,80,$errno,$errstr,4);  
    if(!$fp) 
      { echo "Imposible conectar $url o no ha indicado URL";  
        return false;    
      }  
    else
     { $headers=$buffer='';
       fputs($fp,"GET /$uri HTTP/1.0\r\n");  
       fputs($fp,"Host: $url\r\n");  
       fputs($fp,"User-Agent: sourcegetter\r\n");  
       fputs($fp,"Connection: close\r\n");  
       fputs($fp,"\r\n");  
       $buscar = array("<br />", "<br>");
       while(!feof($fp))  
	 {  if(!isset($end_of_headers))  
		{ $header=fgets($fp,4096);  
		 if($header=="\r\n")  
		  $end_of_headers=1;  
		  $headers.=$header;  }  else  {  
		  if (!empty($quitar)) { 
			 $buffer.= strip_tags(fgets($fp,4096));  }
		 else {  $buffer.=fgets($fp,4096);      } } 
		 }  
	     fclose($fp);  
	     if($show_headers)  
	     {   $headers=htmlentities($headers);  
		 $headers=nl2br($headers); 
		 $headers = str_ireplace($buscar," ",$headers);
		 echo $headers;   }  
	     $buffer=htmlentities($buffer);  
	     $buffer=nl2br($buffer); 
	     $buffer = str_ireplace($buscar," ",$buffer);							
	     echo $buffer;  
	 return true;  
}  
} 

HTML