How to Run PHP Code?

This is going to seem really simple and silly of me but I am really struggling to get this code running on my Xibo setup :(

<meta http-equiv="refresh" content="600">
<?php
date_default_timezone_set('Europe/London');
echo('<div align="center"><b><U>');
/*
print(Date("l"));
echo('<br/>');
print(Date("F d, Y"));
echo('<br/>');
echo('<br/>');
*/
$hour=Date("G");
$minute=Date("i");

if (($hour < "8") || ($hour == "8" && $minute <= "40"))
{
echo("Before School");
}
if (($hour == "8" && $minute > "40"))
{
echo("Registration");
}
if (($hour == "9"))
{
echo("Period 1");
}
if (($hour == 10))
{
echo("Period 2");
}
if ($hour == 11 && $minute < 20)
{
echo("Morning Break");
}
if (($hour == 11 && $minute > 20) || ($hour == 12 && $minute < 20))
{
echo("Period 3");
}
if (($hour == 12 && $minute > 20))
{
echo("Lunch");
}
if (($hour == 13))
{
echo("Period 4");
}
if (($hour == 14))
{
echo("Period 5");
}
if (($hour == 15) || ($hour > 15))
{
echo("After School");
}

echo('</U></b></div>');
?>

This is the script as I have found it.. but I would really like to get it running on our Xibo setup :)

Thanks