Very Basic iPXE php script

boot.php

<?php
echo "#!ipxe\n";
$install = true;
$server_ip = "192.168.1.1";
$proxy = "http_proxy=http://192.168.1.1:8080";
$kickstart = "ubuntu-12.04-LTS.ks"

if ($install) {
        //default to ubuntu live system
        ?>
        set base-url http://<?php echo $server_ip; ?>/iso/loop/install/netboot/ubuntu-installer/amd64
        kernel ${base-url}/linux
        initrd ${base-url}/initrd.gz
        imgargs linux auto=true ks=http://<?php echo $server_ip; ?>/ks/<?php echo $kickstart; ?> <?php echo $proxy; ?>
        <?php
}
?>
boot