If / Else：在If语句中添加“Or”

Question

I'm trying to condense my code to create less lines of PHP and was wondering if this is possible. Currently I have:

if ($_SERVER['HTTP_HOST']==domain1.com" ) {
    down();
} elseif ($_SERVER['HTTP_HOST']=="domain2.com" ) {
    down();
} else {
    up();
}
?>

instead of having if and elseif displaying the same function, is it possible to do something like this:

if ($_SERVER['HTTP_HOST']==domain1.com" || $_SERVER['HTTP_HOST']=="domain2.com" ) {
    down();
} else {
    up();
}
?>

I tried the code above but my page went blank.. how do I do this if possible?

Answer 1

Its because of the syntax errors -

if ($_SERVER['HTTP_HOST']=="domain1.com" || $_SERVER['HTTP_HOST']=="domain2.com" ) {
    down();
} else {
    up();
}

or you can do this also -

$domains = array("domain1.com", "domain2.com");
if (in_array($_SERVER['HTTP_HOST'], $domains)) {