Baobaz Blog

Here another simple solution:

if ($_SERVER['HTTP_HOST'] == "someotherdomain.com"){
$_SERVER["MAGE_RUN_CODE"] = "yourcode";
$_SERVER["MAGE_RUN_TYPE"] = "website";
}

before:

$mageRunCode = isset($_SERVER['MAGE_RUN_CODE']) ? $_SERVER['MAGE_RUN_CODE'] : '';

Note: I set up the second store as website - not as store.