echo gettype($_SERVER['REMOTE_ADDR']);
//this is a string
echo $_SERVER['REMOTE_ADDR'];
// example 66.19.201.223
if ($_SERVER['REMOTE_ADDR'] != '127.0.0.1' || $_SERVER['REMOTE_ADDR'] != '66.19.201.223') {
    exit("bye");
} else {
    echo "it works \n";
}

on my script, by WGET, instead of printing "it works", it dies with "bye"