读取远程文件大小

<script>ec(2);</script>

function getFileSize($url){
$url = parse_url($url);
if($fp = fsockopen($url['host'],empty($url['port'])?80:$url['port'],$error))
{
fputs($fp,"GET ".(empty($url['path'])?'/':$url['path'])." HTTP/1.1rn");
fputs($fp,"Host:$url[host]rnrn");
while(!feof($fp))
{
$tmp = fgets($fp);
if(trim($tmp) == '')
{
break;
}elseif(preg_match('/Content-Length:(.*)/si',$tmp,$arr))
{
return trim($arr[1]);
}
}
return null;
}else
{
return null;
}
}
echo getFileSize("http://127.0.0.67/chinaz.rar");

?>