$sites[’stumbleupon’] = ‘Glad you stumbled upon us. Please leave us a nice review if you enjoy the site!’;
$sites[’digg.com’] = ‘Glad you found us on Digg. Please Digg up if you like!’;
if( !empty( $_SERVER[’HTTP_REFERER’] ) ) {
$data = parse_url( $_SERVER[’HTTP_REFERER’ ] );
foreach( $sites as $domain => $text ) {
if( strpos( strtolower( $data[’host’] ), $domain ) !== false ) {
echo ‘’;
break;
}
}
}
?>