sibyte.php

<?php

function sibyte($byte){
	$e = array('B', 'K', 'M', 'G');
	$n = 0;
	while($byte >= 1024 && $n < 10){
		$n++;
		$byte = $byte / 1024;
	}
	$sbyte = ''.$byte;
	if(strpos($sbyte, '.') !== false){
		$sbyte = substr($sbyte, 0, strpos($sbyte, '.') + 2);
	}
	if(substr($sbyte, strpos($sbyte, '.') + 1) == '.0'){
		$sbyte = substr($sbyte, 0, strpos($sbyte, '.'));
	}
	return $sbyte.$e[$n + 1].$e[0];
}