SMF'nin şu kodlarını incelerseniz ne demek istediğimi anlayacaksınız.

function theme_copyright($get_it = false)
{
	global $forum_copyright, $context, $boardurl, $forum_version, $txt, $modSettings;
	static $found = false;

	// DO NOT MODIFY THIS FUNCTION.  DO NOT REMOVE YOUR COPYRIGHT.
	// DOING SO VOIDS YOUR LICENSE AND IS ILLEGAL.

	// Meaning, this is the footer checking in..
	if ($get_it === true)
		return $found;

	// Naughty, naughty.
	if (mt_rand(0, 2) == 1)
	{
		$temporary = preg_replace('~<!--.+?-->~s', '', ob_get_contents());
		if (strpos($temporary, '<!--') !== false)
			echo '-->';
	}

	// For SSI and other things, detect the version.
	if (!isset($forum_version) || strpos($forum_version, 'SMF') === false || isset($_GET['checkcopyright']))
	{
		$data = substr(file_get_contents(__FILE__), 0, 4096);
		if (preg_match('~\*\s*Software\s+Version:\s+(SMF\s+.+?)[\s]{2}~i', $data, $match) == 0)
			$match = array('', 'SMF');
		$forum_copyright = preg_replace('~(<a href="http://www.simplemachines.org/"[^>]+>)</a>~', '$1' . $match[1] . '</a>', $forum_copyright);
	}

	// Lewis Media no longer holds the copyright.
	$forum_copyright = str_replace(array('Lewis Media', 'Simple Machines LLC', 'href="http://www.lewismedia.com/"', '2001-'), array('Simple Machines', 'Simple Machines', 'href="http://www.simplemachines.org/about/copyright.php" title="Free Forum Software"', ''), $forum_copyright);

	echo '
		<span class="smalltext" style="display: inline; visibility: visible; font-family: Verdana, Arial, sans-serif;">';

	if ($get_it == 'none')
	{
		$found = true;
		echo '
			<div style="white-space: normal;">The administrator doesn\'t want a copyright notice saying this is copyright 2006 - 2009 by <a href="http://www.simplemachines.org/about/copyright.php" target="_blank">Simple Machines LLC</a>, and named <a href="http://www.simplemachines.org/">SMF</a>, so the forum will honor this request and be quiet.</div>';
	}
	// If it's in the copyright, and we are outputting it... it's been found.
	elseif (isset($modSettings['copyright_key']) && sha1($modSettings['copyright_key'] . 'banjo') == '1d01885ece7a9355bdeb22ed107f0ffa8c323026'){$found = true; return;}elseif ((strpos($forum_copyright, '<a href="http://www.simplemachines.org/" title="Simple Machines Forum" target="_blank">Powered by SMF') !== false || strpos($forum_copyright, '<a href="http://www.simplemachines.org/" onclick="this.href += \'referer.php?forum=' . urlencode($context['forum_name'] . '|' . $boardurl . '|' . $forum_version) . '\';" target="_blank">SMF') !== false || strpos($forum_copyright, '<a href="http://www.simplemachines.org/" target="_blank">SMF') !== false || strpos($forum_copyright, '<a href="http://www.simplemachines.org/" title="Simple Machines Forum" target="_blank">SMF') !== false)&&((strpos($forum_copyright, '<a href="http://www.simplemachines.org/about/copyright.php" title="Free Forum Software" target="_blank">SMF &copy;') !== false && (strpos($forum_copyright, 'Lewis Media</a>') !== false || strpos($forum_copyright, 'Simple Machines</a>') !== false)) || strpos($forum_copyright, '<a href="http://www.lewismedia.com/">Lewis Media</a>') !== false || strpos($forum_copyright, '<a href="http://www.lewismedia.com/" target="_blank">Lewis Media</a>') !== false || (strpos($forum_copyright, '<a href="http://www.simplemachines.org/about/copyright.php"') !== false &&	strpos($forum_copyright, 'Simple Machines') !== false))){$found = true; echo $forum_copyright;}

	echo '
		</span>';
}