多个域名绑定一个空间互不影响php

[topvip]

$domain_year="bbs.1001year.net";
$domain_cate="1001cate.com";
$domain_pet="1001pet.com";
$domain_1001qb="1001qb.com";
$dot_year_url="year.php";
$dot_cate_url="cate.php";
$dot_pet_url="pet.php";
$dot_1001qb_url="1001qb.php";
if(($HTTP_HOST=="$domain_year"))
{
Header("Location: $dot_year_url");
}
elseif(($HTTP_HOST=="$domain_cate")or($HTTP_HOST=="www.$domain_cate")or($HTTP_HOST=="bbs.$domain_cate"))
{
Header("Location: $dot_cate_url");
}
elseif(($HTTP_HOST=="$domain_pet")or($HTTP_HOST=="www.$domain_pet")or($HTTP_HOST=="bbs.$domain_pet"))
{
Header("Location: $dot_pet_url");
}
else
{
Header("Location: $dot_1001qb_url");
}
?>