Loads a directory of isos and returns an ipxe-compatible boot list

ipxe-isodir.php

<?php
header("Content-Type: text/plain");
$server = "http://192.168.1.1";
?>
#!ipxe

menu ISO Directory
<?php
$arr = array();
$urls = array();
foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator('iso', FilesystemIterator::SKIP_DOTS)) as $item => $file) {
    $arr[] = $item;
}
sort($arr);
foreach($arr as $item) {
    if (substr($item,-4) == ".iso") {
        $bn = basename($item, ".iso");
        $urls[] = array($bn,$item); ?>
item <?php echo $bn; ?> ${space} <?php echo $bn; ?>

<?php
    }
} ?>
choose --default ${menu} menu || goto iso_exit
echo ${cls}
goto ${menu} ||
chain ${menu}.ipxe || goto iso_exit
goto iso_exit

<?php
foreach ($urls as $pair) { ?>

:<?php echo $pair[0]; ?>

set util_path <?php echo $pair[1]; ?>

set util_file <?php echo $pair[0]; ?>.iso
goto boot_memdisk
<?php
}
?>

:boot_memdisk
imgfree
kernel ${memdisk} iso raw
initrd --name ${util_file} <?php echo $server; ?>/pxe/${util_path}
echo
boot
goto iso_exit

:iso_exit
clear menu
exit 0