PHP doesn't send a message with no reason

Question

I'm setting up a TS3 Bot using PHP. When I wanted to test whether something works (sending a message to the site), nothing happens. Code:

<?php
    define("host", "localhost");
    define("QueryName", "serveradmin");
    define("Nickname", "Test BOT");
    define("Password", "");
    define("QueryPort", "10011");
    define("ServerPort", "9987");

    echo "Test";
    echo host;
    echo QueryName;
    echo Nickname;
    echo Password;
    echo QueryPort;
    echo ServerPort;
?>