/**
* @author MRASONG
* @param int $number The number being formatted
* @param int $decimals Sets the number of decimal points.
* @param string $format The format string [sprintf]
* @return string
*/
public static function fsize($number=0, $decimals=2, $format='%s %s'){
$units = array('B', 'KB', 'MB', 'GB', 'TB', 'PB');
$i = 0;
$base = pow(2, 10);
$size = $number;
while ($number >= pow($base, $i+1)) {
$size = $number / pow($base, ++$i);
}
return sprintf($format, number_format($size, $decimals, '.', ''), $units[$i]);
}