Signer::unpack

public function unpack($value, $limit = 2)
{
	// Some kind of optimization
	if ($limit === 0)
	{
		if (strpos($value, $this->separator) === false)
			throw new BadSignatureException('Separator not found in value');

		return explode($this->separator, $value);
	}

	$result = array();
	while(--$limit > 0)
	{
		$pos = bxstrrpos($value, $this->separator);
		if ($pos === false)
			throw new BadSignatureException('Separator not found in value');

		$result[] = mb_substr($value, $pos + 1);
		$value = mb_substr($value, 0, $pos);
	}
	$result[] = $value;

	return array_reverse($result);
}