SimplePie_IRI::set_host

		{
			$this->ihost = null;
			return true;
		}
		elseif (substr($ihost, 0, 1) === '[' && substr($ihost, -1) === ']')
		{
			if (SimplePie_Net_IPv6::check_ipv6(substr($ihost, 1, -1)))
			{
				$this->ihost = '[' . SimplePie_Net_IPv6::compress(substr($ihost, 1, -1)) . ']';
			}
			else
			{
				$this->ihost = null;
				return false;
			}
		}
		else
		{
			$ihost = $this->replace_invalid_with_pct_encoding($ihost, '!$&\'()*+,;=');

			// Lowercase, but ignore pct-encoded sections (as they should
			// remain uppercase). This must be done after the previous step
			// as that can add unescaped characters.
			$position = 0;
			$strlen = strlen($ihost);
			while (($position += strcspn($ihost, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ%', $position)) < $strlen)
			{
				if ($ihost[$position] === '%')
				{
					$position += 3;
				}
				else
				{
					$ihost[$position] = strtolower($ihost[$position]);
					$position++;
				}
			}

			$this->ihost = $ihost;
		}

		$this->scheme_normalization();

		return true;
	}

	/**
	 * Set the port. Returns true on success, false on failure (if there are