public static function GetEncoding($list)
{
$pattern = '0';
$multiplier = 1;
foreach ($list as $member) {
$pattern = Conversion::BinaryMultiply($pattern, Conversion::Binary($multiplier));
//echo $pattern.'<br>';
$pattern = Conversion::BinaryAdd($pattern, Conversion::Binary($member[1]));
$multiplier = $member[0];
}
return $pattern;
}
public static function Decode($base64)
{
$binary_digits = '';
$alignment = strpos(self::$symbols, substr($base64, 0, 1));
if ($alignment === false) {
return false;
}
if ($alignment > 0) {
$alignment = 6 - $alignment;
}
$length = strlen($base64);
for ($symbol_pos = 1; $symbol_pos < $length; $symbol_pos++) {
$value = strpos(self::$symbols, substr($base64, $symbol_pos, 1));
if ($value === false) {
return false;
} else {
$binary_digits .= Conversion::Binary($value, 6);
}
}
return substr($binary_digits, 0, strlen($binary_digits) - $alignment);
}