<?php
//Check the disks' free space.
//If you have more hard disks put them here.
$d = disk_free_space("D:");

$d2 = disk_total_space("C:");


//Disk D:
//Byte (8 Bits)
//KiloByte (1024 B)
//MegaByte (1024 KB)
//GigaByte (1024 MB)
//TeraByte (1024 GB)
//PetaByte ( 1024 TB )
//ExaByte ( 1024 PB )
//ZettaByte ( 1024 EB )
//YottaByte ( 1024 ZB )
echo("Disk D:'s space in MB: ");
echo("$d2"/1024/1024);
echo(" MB <br />");
echo("Free disk D: space:<br />");
echo("$d Bytes <br />");
echo("$d"/1024);
echo(" KB <br />");
echo("$d"/1024/1024);
echo(" MB <br />");
echo("$d"/1024/1024/1024);
echo(" GB <br />");
echo("$d"/1024/1024/1024/1024);
echo(" TB <br />");
echo("$d"/1024/1024/1024/1024/1024);
echo(" PB <br />");
echo("$d"/1024/1024/1024/1024/1024/1024);
echo(" EB <br />");
echo("$d"/1024/1024/1024/1024/1024/1024/1024);
echo(" ZB <br />");
echo("$d"/1024/1024/1024/1024/1024/1024/1024/1024);
echo(" YB <br />");

?>