Код редиректа

Код:
function parse_se($seoref)
{
$out = array();
$seo_info = parse_url($seoref);
$se = @$seo_info['host'];
$query = @$seo_info['query'];
if(strstr($se, 'google') !== false)
{
$out['se'] = 'google';
parse_str($query, $out['q']);
$out['q'] = urldecode(@$out['q']['q']);
}
if(strstr($se, 'msn') !== false)
{
$out['se'] = 'msn';
parse_str($query, $out['q']);
$out['q'] = urldecode(@$out['q']['q']);
}
if(strstr($se, 'yahoo') !== false)
{
$out['se'] = 'yahoo';
parse_str($query, $out['q']);
$out['q'] = urldecode(@$out['q']['p']);
}
return $out;
}
$ref = @$_SERVER['HTTP_REFERER'];
//traff with referer
if($ref != '')
{
$se_out = parse_se($ref);
switch ($se_out['se'])
{
case 'google':
$url = 'for google';
break;
case 'yahoo':
$url = 'for yahoo';
break;
case'msn':
$url = 'for msn';
break;
default:
$url = 'for other se';
break;
}
}
//no ref traff
else
{
$url = 'http://google.com';//иди и ищи :)
}
header("Location: $url");
?>