获取元标记不起作用

I have this link http://www.geobytes.com/IpLocator.htm?GetLocation&template=php3.txt&IpAddress=

and return the meta tags

<meta name="known" content="true">

<meta name="internet" content="EN">

and other. On page php i tried this

<?php 

$tags = get_meta_tags('http://www.geobytes.com/IpLocator.htm?GetLocation&template=php3.txt&IpAddress=');


print $tags['city'];  // city name


?>

not work and return a white page why?

Try to Use:

print_r(
   get_meta_tags("http://www.geobytes.com/IpLocator.htm?GetLocation&template=php3.txt&IpAddress=") 
);