Base64 Encoding

Encodes data with MIME base64. This encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean, such as mail bodies.

									function Encode($data)
{
	$length; $length2;
	$blockCount;
	$paddingCount;

	$length = strlen($data);

	if (($length % 3) == 0)
	{
		$paddingCount = 0;
		$blockCount = floor($length / 3);
	}
	else
	{
		$paddingCount = 3 - ($length % 3);
		$blockCount = floor(($length + $paddingCount) / 3);
	}

	$length2 = $length + $paddingCount;

	$source2 = array();

	for ($x = 0; $x < $length2; $x++)
	{
		if ($x < $length)
		{
			$source2[$x] = ord($data[$x]);
		}
		else
		{
			$source2[$x] = 0;
		}
	}

	$b1; $b2; $b3;
	$temp; $temp1; $temp2; $temp3; $temp4;
	$buffer = array();
	$result = array();

	for ($x = 0; $x < $blockCount; $x++)
	{
		$b1 = $source2[$x * 3];
		$b2 = $source2[$x * 3 + 1];
		$b3 = $source2[$x * 3 + 2];

		$temp1 = (($b1 & 252) >> 2);

		$temp = (($b1 & 3) << 4);
		$temp2 = (($b2 & 240) >> 4);
		$temp2 += $temp;

		$temp = (($b2 & 15) << 2);
		$temp3 = (($b3 & 192) >> 6);
		$temp3 += $temp;

		$temp4 = ($b3 & 63);

		$buffer[$x * 4] = $temp1;
		$buffer[$x * 4 + 1] = $temp2;
		$buffer[$x * 4 + 2] = $temp3;
		$buffer[$x * 4 + 3] = $temp4;

	}

	for ($x = 0; $x < $blockCount * 4; $x++)
	{
		$result[$x] = SixBitToChar($buffer[$x]);
	}

	switch ($paddingCount)
	{
		case 0:
			break;
		case 1:
			$result[$blockCount * 4 - 1] = '=';
			break;
		case 2:
			$result[$blockCount * 4 - 1] = '=';
			$result[$blockCount * 4 - 2] = '=';
			break;
		default:
			break;
	}

	return implode("", $result);
}

function SixBitToChar($b)
{
	$lookupTable = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

	if (($b >= 0) && ($b <= 63))
	{
		return $lookupTable[$b];
	}
	else
	{
		return ' ';
	}
}

Example

									$data = "jdfgsdhfsdfsd 6445dsfsd7fg/*/+bfjsdgf%$^";
$value = Encode($data, strlen($data));

Output

									amRmZ3NkaGZzZGZzZCA2NDQ1ZHNmc2Q3ZmcvKi8rYmZqc2RnZiUkXg==