final static public function sizeTextToBytes (int $size=0, string $unit="") : int
	{
		$units = ['B' => 0, 'KB' => 1, 'MB' => 2, 'GB' => 3, 'TB' => 4, 'PB' => 5, 'EB' => 6, 'ZB' => 7, 'YB' => 8 ];
		return $size * pow(1024, $units[strtoupper($unit)]);
	}