Leaks memory

[VitaliyMarkelov]

File of 2Gb fails consistently:

                $chunkSize = 4096;
		while (!feof($handle)) {
			$buffer = fgets($handle, $chunkSize);			
			$result = Encoding::toUTF8($buffer);
                        // $result = $buffer; // this works perfectly OK
			fputs($handle_w, $result);
		}