php获取某个网站了内容 而且保存为TXT 下次直接从txt读取

<br />
<?php <br />
function get_flash_url( $url ) <br />
{ <br />
$lines = file($url); <br />
foreach ($lines as $linenum=> $line) { <br />
preg_match_all('|<title>([^<>]+)</title>|',$line,$result); <br />
$swfurl=$result[1][0]; <br />
if(!empty($swfurl)) <br />
return $swfurl; <br />
} <br />
} <br />
?><?php <br />
$url=$_SERVER["QUERY_STRING"]; <br />
$flashurl= get_flash_url($url); <br />
echo preg_replace("/[&,?]/","",$flashurl);<br />
?><br />