高分!PHP网页抓取的有关问题

header("Content-type:text/html;charset=utf-8");
$url="http://www.zootoo.com/petnews/hailtothecatsasalutetofirstfel-1611";  
$contents=file_get_contents($url);
$contents=preg_replace('/>(\s+)/','>',$contents);
$contents=str_replace("\r\n",'',$contents);
$contents=str_replace("\t",'',$contents);
//echo $contents;
preg_match_all('~(.*?)(.*?)~is',$contents,$p);
print_r($p[1]);
print_r($p[2]);