$address = 'http://www.youtube.com/'
$domain = parse_url($address, PHP_URL_HOST);
or from a database
$domain = parse_url($row['address_column'], PHP_URL_HOST);
display with
<image src="http://www.google.com/s2/favicons?domain='.$domain.'" />
http://www.google.com/s2/favicons?domain=www.bounty.com
$address = 'http://www.youtube.com/'
$domain = parse_url($address, PHP_URL_HOST);
or from a database
$domain = parse_url($row['address_column'], PHP_URL_HOST);
display with
<image src="http://www.google.com/s2/favicons?domain='.$domain.'" />