SimplePie_Misc::space_seperated_tokens

					return SIMPLEPIE_CONSTRUCT_XHTML;
			}
			if (in_array(substr($type, -4), array('+xml', '/xml')) || substr($type, 0, 5) === 'text/')
			{
				return SIMPLEPIE_CONSTRUCT_NONE;
			}
			else
			{
				return SIMPLEPIE_CONSTRUCT_BASE64;
			}
		}

		return SIMPLEPIE_CONSTRUCT_TEXT;
	}

	public static function is_isegment_nz_nc($string)
	{
		return (bool) preg_match('/^([A-Za-z0-9\-._~\x{A0}-\x{D7FF}\x{F900}-\x{FDCF}\x{FDF0}-\x{FFEF}\x{10000}-\x{1FFFD}\x{20000}-\x{2FFFD}\x{30000}-\x{3FFFD}\x{40000}-\x{4FFFD}\x{50000}-\x{5FFFD}\x{60000}-\x{6FFFD}\x{70000}-\x{7FFFD}\x{80000}-\x{8FFFD}\x{90000}-\x{9FFFD}\x{A0000}-\x{AFFFD}\x{B0000}-\x{BFFFD}\x{C0000}-\x{CFFFD}\x{D0000}-\x{DFFFD}\x{E1000}-\x{EFFFD}!$&\'()*+,;=@]|(%[0-9ABCDEF]{2}))+$/u', $string);