private function normalize_int($size)
{
if (is_string($size)) {
switch (substr($size, -1)) {
case 'M':
case 'm':
return $size * 1048576;
case 'K':
case 'k':
return $size * 1024;
case 'G':
case 'g':
return $size * 1073741824;
}
}
return (int) $size;
}