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 />