/Sources/Subs.php

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<?php

/**
 * This file has all the main functions in it that relate to, well, everything.
 *
 * Simple Machines Forum (SMF)
 *
 * @package SMF
 * @author Simple Machines http://www.simplemachines.org
 * @copyright 2012 Simple Machines
 * @license http://www.simplemachines.org/about/smf/license.php BSD
 *
 * @version 2.1 Alpha 1
 */

if (!defined('SMF'))
	die('Hacking attempt...');

/**
 * Update some basic statistics.
 *
 * 'member' statistic updates the latest member, the total member
 *  count, and the number of unapproved members.
 * 'member' also only counts approved members when approval is on, but
 *  is much more efficient with it off.
 *
 * 'message' changes the total number of messages, and the
 *  highest message id by id_msg - which can be parameters 1 and 2,
 *  respectively.
 *
 * 'topic' updates the total number of topics, or if parameter1 is true
 *  simply increments them.
 *
 * 'subject' updateds the log_search_subjects in the event of a topic being
 *  moved, removed or split.  parameter1 is the topicid, parameter2 is the new subject
 *
 * 'postgroups' case updates those members who match condition's
 *  post-based membergroups in the database (restricted by parameter1).
 *
 * @param string $type Stat type - can be 'member', 'message', 'topic', 'subject' or 'postgroups'
 * @param mixed $parameter1 = null
 * @param mixed $parameter2 = null
 */
function updateStats($type, $parameter1 = null, $parameter2 = null)
{
	global $sourcedir, $modSettings, $smcFunc;

	switch ($type)
	{
	case 'member':
		$changes = array(
			'memberlist_updated' => time(),
		);

		// #1 latest member ID, #2 the real name for a new registration.
		if (is_numeric($parameter1))
		{
			$changes['latestMember'] = $parameter1;
			$changes['latestRealName'] = $parameter2;

			updateSettings(array('totalMembers' => true), true);
		}

		// We need to calculate the totals.
		else
		{
			// Update the latest activated member (highest id_member) and count.
			$result = $smcFunc['db_query']('', '
				SELECT COUNT(*), MAX(id_member)
				FROM {db_prefix}members
				WHERE is_activated = {int:is_activated}',
				array(
					'is_activated' => 1,
				)
			);
			list ($changes['totalMembers'], $changes['latestMember']) = $smcFunc['db_fetch_row']($result);
			$smcFunc['db_free_result']($result);

			// Get the latest activated member's display name.
			$result = $smcFunc['db_query']('', '
				SELECT real_name
				FROM {db_prefix}members
				WHERE id_member = {int:id_member}
				LIMIT 1',
				array(
					'id_member' => (int) $changes['latestMember'],
				)
			);
			list ($changes['latestRealName']) = $smcFunc['db_fetch_row']($result);
			$smcFunc['db_free_result']($result);

			// Are we using registration approval?
			if ((!empty($modSettings['registration_method']) && $modSettings['registration_method'] == 2) || !empty($modSettings['approveAccountDeletion']))
			{
				// Update the amount of members awaiting approval - ignoring COPPA accounts, as you can't approve them until you get permission.
				$result = $smcFunc['db_query']('', '
					SELECT COUNT(*)
					FROM {db_prefix}members
					WHERE is_activated IN ({array_int:activation_status})',
					array(
						'activation_status' => array(3, 4),
					)
				);
				list ($changes['unapprovedMembers']) = $smcFunc['db_fetch_row']($result);
				$smcFunc['db_free_result']($result);
			}
		}

		updateSettings($changes);
		break;

	case 'message':
		if ($parameter1 === true && $parameter2 !== null)
			updateSettings(array('totalMessages' => true, 'maxMsgID' => $parameter2), true);
		else
		{
			// SUM and MAX on a smaller table is better for InnoDB tables.
			$result = $smcFunc['db_query']('', '
				SELECT SUM(num_posts + unapproved_posts) AS total_messages, MAX(id_last_msg) AS max_msg_id
				FROM {db_prefix}boards
				WHERE redirect = {string:blank_redirect}' . (!empty($modSettings['recycle_enable']) && $modSettings['recycle_board'] > 0 ? '
					AND id_board != {int:recycle_board}' : ''),
				array(
					'recycle_board' => isset($modSettings['recycle_board']) ? $modSettings['recycle_board'] : 0,
					'blank_redirect' => '',
				)
			);
			$row = $smcFunc['db_fetch_assoc']($result);
			$smcFunc['db_free_result']($result);

			updateSettings(array(
				'totalMessages' => $row['total_messages'] === null ? 0 : $row['total_messages'],
				'maxMsgID' => $row['max_msg_id'] === null ? 0 : $row['max_msg_id']
			));
		}
		break;

	case 'subject':
		// Remove the previous subject (if any).
		$smcFunc['db_query']('', '
			DELETE FROM {db_prefix}log_search_subjects
			WHERE id_topic = {int:id_topic}',
			array(
				'id_topic' => (int) $parameter1,
			)
		);

		// Insert the new subject.
		if ($parameter2 !== null)
		{
			$parameter1 = (int) $parameter1;
			$parameter2 = text2words($parameter2);

			$inserts = array();
			foreach ($parameter2 as $word)
				$inserts[] = array($word, $parameter1);

			if (!empty($inserts))
				$smcFunc['db_insert']('ignore',
					'{db_prefix}log_search_subjects',
					array('word' => 'string', 'id_topic' => 'int'),
					$inserts,
					array('word', 'id_topic')
				);
		}
		break;

	case 'topic':
		if ($parameter1 === true)
			updateSettings(array('totalTopics' => true), true);
		else
		{
			// Get the number of topics - a SUM is better for InnoDB tables.
			// We also ignore the recycle bin here because there will probably be a bunch of one-post topics there.
			$result = $smcFunc['db_query']('', '
				SELECT SUM(num_topics + unapproved_topics) AS total_topics
				FROM {db_prefix}boards' . (!empty($modSettings['recycle_enable']) && $modSettings['recycle_board'] > 0 ? '
				WHERE id_board != {int:recycle_board}' : ''),
				array(
					'recycle_board' => !empty($modSettings['recycle_board']) ? $modSettings['recycle_board'] : 0,
				)
			);
			$row = $smcFunc['db_fetch_assoc']($result);
			$smcFunc['db_free_result']($result);

			updateSettings(array('totalTopics' => $row['total_topics'] === null ? 0 : $row['total_topics']));
		}
		break;

	case 'postgroups':
		// Parameter two is the updated columns: we should check to see if we base groups off any of these.
		if ($parameter2 !== null && !in_array('posts', $parameter2))
			return;

		$postgroups = cache_get_data('updateStats:postgroups', 360);
		if ($postgroups == null || $parameter1 == null)
		{
			// Fetch the postgroups!
			$request = $smcFunc['db_query']('', '
				SELECT id_group, min_posts
				FROM {db_prefix}membergroups
				WHERE min_posts != {int:min_posts}',
				array(
					'min_posts' => -1,
				)
			);
			$postgroups = array();
			while ($row = $smcFunc['db_fetch_assoc']($request))
				$postgroups[$row['id_group']] = $row['min_posts'];
			$smcFunc['db_free_result']($request);

			// Sort them this way because if it's done with MySQL it causes a filesort :(.
			arsort($postgroups);

			cache_put_data('updateStats:postgroups', $postgroups, 360);
		}

		// Oh great, they've screwed their post groups.
		if (empty($postgroups))
			return;

		// Set all membergroups from most posts to least posts.
		$conditions = '';
		$lastMin = 0;
		foreach ($postgroups as $id => $min_posts)
		{
			$conditions .= '
					WHEN posts >= ' . $min_posts . (!empty($lastMin) ? ' AND posts <= ' . $lastMin : '') . ' THEN ' . $id;
			$lastMin = $min_posts;
		}

		// A big fat CASE WHEN... END is faster than a zillion UPDATE's ;).
		$smcFunc['db_query']('', '
			UPDATE {db_prefix}members
			SET id_post_group = CASE ' . $conditions . '
					ELSE 0
				END' . ($parameter1 != null ? '
			WHERE ' . (is_array($parameter1) ? 'id_member IN ({array_int:members})' : 'id_member = {int:members}') : ''),
			array(
				'members' => $parameter1,
			)
		);
		break;

		default:
			trigger_error('updateStats(): Invalid statistic type \'' . $type . '\'', E_USER_NOTICE);
	}
}

/**
 * Updates the columns in the members table.
 * Assumes the data has been htmlspecialchar'd.
 * this function should be used whenever member data needs to be
 * updated in place of an UPDATE query.
 *
 * id_member is either an int or an array of ints to be updated.
 *
 * data is an associative array of the columns to be updated and their respective values.
 * any string values updated should be quoted and slashed.
 *
 * the value of any column can be '+' or '-', which mean 'increment'
 * and decrement, respectively.
 *
 * if the member's post number is updated, updates their post groups.
 *
 * @param mixed $members An array of integers
 * @param array $data
 */
function updateMemberData($members, $data)
{
	global $modSettings, $user_info, $smcFunc;

	$parameters = array();
	if (is_array($members))
	{
		$condition = 'id_member IN ({array_int:members})';
		$parameters['members'] = $members;
	}
	elseif ($members === null)
		$condition = '1=1';
	else
	{
		$condition = 'id_member = {int:member}';
		$parameters['member'] = $members;
	}

	// Everything is assumed to be a string unless it's in the below.
	$knownInts = array(
		'date_registered', 'posts', 'id_group', 'last_login', 'instant_messages', 'unread_messages',
		'new_pm', 'pm_prefs', 'gender', 'hide_email', 'show_online', 'pm_email_notify', 'pm_receive_from', 'karma_good', 'karma_bad',
		'notify_announcements', 'notify_send_body', 'notify_regularity', 'notify_types',
		'id_theme', 'is_activated', 'id_msg_last_visit', 'id_post_group', 'total_time_logged_in', 'warning',
	);
	$knownFloats = array(
		'time_offset',
	);

	if (!empty($modSettings['integrate_change_member_data']))
	{
		// Only a few member variables are really interesting for integration.
		$integration_vars = array(
			'member_name',
			'real_name',
			'email_address',
			'id_group',
			'gender',
			'birthdate',
			'website_title',
			'website_url',
			'location',
			'hide_email',
			'time_format',
			'time_offset',
			'avatar',
			'lngfile',
		);
		$vars_to_integrate = array_intersect($integration_vars, array_keys($data));

		// Only proceed if there are any variables left to call the integration function.
		if (count($vars_to_integrate) != 0)
		{
			// Fetch a list of member_names if necessary
			if ((!is_array($members) && $members === $user_info['id']) || (is_array($members) && count($members) == 1 && in_array($user_info['id'], $members)))
				$member_names = array($user_info['username']);
			else
			{
				$member_names = array();
				$request = $smcFunc['db_query']('', '
					SELECT member_name
					FROM {db_prefix}members
					WHERE ' . $condition,
					$parameters
				);
				while ($row = $smcFunc['db_fetch_assoc']($request))
					$member_names[] = $row['member_name'];
				$smcFunc['db_free_result']($request);
			}

			if (!empty($member_names))
				foreach ($vars_to_integrate as $var)
					call_integration_hook('integrate_change_member_data', array($member_names, $var, $data[$var], $knownInts, $knownFloats));
		}
	}

	$setString = '';
	foreach ($data as $var => $val)
	{
		$type = 'string';
		if (in_array($var, $knownInts))
			$type = 'int';
		elseif (in_array($var, $knownFloats))
			$type = 'float';
		elseif ($var == 'birthdate')
			$type = 'date';

		// Doing an increment?
		if ($type == 'int' && ($val === '+' || $val === '-'))
		{
			$val = $var . ' ' . $val . ' 1';
			$type = 'raw';
		}

		// Ensure posts, instant_messages, and unread_messages don't overflow or underflow.
		if (in_array($var, array('posts', 'instant_messages', 'unread_messages')))
		{
			if (preg_match('~^' . $var . ' (\+ |- |\+ -)([\d]+)~', $val, $match))
			{
				if ($match[1] != '+ ')
					$val = 'CASE WHEN ' . $var . ' <= ' . abs($match[2]) . ' THEN 0 ELSE ' . $val . ' END';
				$type = 'raw';
			}
		}

		$setString .= ' ' . $var . ' = {' . $type . ':p_' . $var . '},';
		$parameters['p_' . $var] = $val;
	}

	$smcFunc['db_query']('', '
		UPDATE {db_prefix}members
		SET' . substr($setString, 0, -1) . '
		WHERE ' . $condition,
		$parameters
	);

	updateStats('postgroups', $members, array_keys($data));

	// Clear any caching?
	if (!empty($modSettings['cache_enable']) && $modSettings['cache_enable'] >= 2 && !empty($members))
	{
		if (!is_array($members))
			$members = array($members);

		foreach ($members as $member)
		{
			if ($modSettings['cache_enable'] >= 3)
			{
				cache_put_data('member_data-profile-' . $member, null, 120);
				cache_put_data('member_data-normal-' . $member, null, 120);
				cache_put_data('member_data-minimal-' . $member, null, 120);
			}
			cache_put_data('user_settings-' . $member, null, 60);
		}
	}
}

/**
 * Updates the settings table as well as $modSettings... only does one at a time if $update is true.
 *
 * - updates both the settings table and $modSettings array.
 * - all of changeArray's indexes and values are assumed to have escaped apostrophes (')!
 * - if a variable is already set to what you want to change it to, that
 *   variable will be skipped over; it would be unnecessary to reset.
 * - When use_update is true, UPDATEs will be used instead of REPLACE.
 * - when use_update is true, the value can be true or false to increment
 *  or decrement it, respectively.
 *
 * @param array $changeArray
 * @param bool $update = false
 * @param bool $debug = false
 */
function updateSettings($changeArray, $update = false, $debug = false)
{
	global $modSettings, $smcFunc;

	if (empty($changeArray) || !is_array($changeArray))
		return;

	// In some cases, this may be better and faster, but for large sets we don't want so many UPDATEs.
	if ($update)
	{
		foreach ($changeArray as $variable => $value)
		{
			$smcFunc['db_query']('', '
				UPDATE {db_prefix}settings
				SET value = {' . ($value === false || $value === true ? 'raw' : 'string') . ':value}
				WHERE variable = {string:variable}',
				array(
					'value' => $value === true ? 'value + 1' : ($value === false ? 'value - 1' : $value),
					'variable' => $variable,
				)
			);
			$modSettings[$variable] = $value === true ? $modSettings[$variable] + 1 : ($value === false ? $modSettings[$variable] - 1 : $value);
		}

		// Clean out the cache and make sure the cobwebs are gone too.
		cache_put_data('modSettings', null, 90);

		return;
	}

	$replaceArray = array();
	foreach ($changeArray as $variable => $value)
	{
		// Don't bother if it's already like that ;).
		if (isset($modSettings[$variable]) && $modSettings[$variable] == $value)
			continue;
		// If the variable isn't set, but would only be set to nothing'ness, then don't bother setting it.
		elseif (!isset($modSettings[$variable]) && empty($value))
			continue;

		$replaceArray[] = array($variable, $value);

		$modSettings[$variable] = $value;
	}

	if (empty($replaceArray))
		return;

	$smcFunc['db_insert']('replace',
		'{db_prefix}settings',
		array('variable' => 'string-255', 'value' => 'string-65534'),
		$replaceArray,
		array('variable')
	);

	// Kill the cache - it needs redoing now, but we won't bother ourselves with that here.
	cache_put_data('modSettings', null, 90);
}

/**
 * Constructs a page list.
 *
 * - builds the page list, e.g. 1 ... 6 7 [8] 9 10 ... 15.
 * - flexible_start causes it to use "url.page" instead of "url;start=page".
 * - handles any wireless settings (adding special things to URLs.)
 * - very importantly, cleans up the start value passed, and forces it to
 *   be a multiple of num_per_page.
 * - checks that start is not more than max_value.
 * - base_url should be the URL without any start parameter on it.
 * - uses the compactTopicPagesEnable and compactTopicPagesContiguous
 *   settings to decide how to display the menu.
 *
 * an example is available near the function definition.
 * $pageindex = constructPageIndex($scripturl . '?board=' . $board, $_REQUEST['start'], $num_messages, $maxindex, true);
 *
 * @param string $base_url
 * @param int $start
 * @param int $max_value
 * @param int $num_per_page
 * @param bool $flexible_start = false
 * @param bool $show_prevnext = true
 */
function constructPageIndex($base_url, &$start, $max_value, $num_per_page, $flexible_start = false, $show_prevnext = true)
{
	global $modSettings, $context, $txt;

	// Save whether $start was less than 0 or not.
	$start = (int) $start;
	$start_invalid = $start < 0;

	// Make sure $start is a proper variable - not less than 0.
	if ($start_invalid)
		$start = 0;
	// Not greater than the upper bound.
	elseif ($start >= $max_value)
		$start = max(0, (int) $max_value - (((int) $max_value % (int) $num_per_page) == 0 ? $num_per_page : ((int) $max_value % (int) $num_per_page)));
	// And it has to be a multiple of $num_per_page!
	else
		$start = max(0, (int) $start - ((int) $start % (int) $num_per_page));

	$context['current_page'] = $start / $num_per_page;

	// Wireless will need the protocol on the URL somewhere.
	if (WIRELESS)
		$base_url .= ';' . WIRELESS_PROTOCOL;

	$base_link = '<a class="navPages" href="' . ($flexible_start ? $base_url : strtr($base_url, array('%' => '%%')) . ';start=%1$d') . '">%2$s</a> ';

	// Compact pages is off or on?
	if (empty($modSettings['compactTopicPagesEnable']))
	{
		// Show the left arrow.
		$pageindex = $start == 0 ? ' ' : sprintf($base_link, $start - $num_per_page, '<span class="previous_page">' . $txt['prev'] . '</span>');

		// Show all the pages.
		$display_page = 1;
		for ($counter = 0; $counter < $max_value; $counter += $num_per_page)
			$pageindex .= $start == $counter && !$start_invalid ? '<span class="current_page"><strong>' . $display_page++ . '</strong></span> ' : sprintf($base_link, $counter, $display_page++);

		// Show the right arrow.
		$display_page = ($start + $num_per_page) > $max_value ? $max_value : ($start + $num_per_page);
		if ($start != $counter - $max_value && !$start_invalid)
			$pageindex .= $display_page > $counter - $num_per_page ? ' ' : sprintf($base_link, $display_page, '<span class="next_page">' . $txt['next'] . '</span>');
	}
	else
	{
		// If they didn't enter an odd value, pretend they did.
		$PageContiguous = (int) ($modSettings['compactTopicPagesContiguous'] - ($modSettings['compactTopicPagesContiguous'] % 2)) / 2;

		// Show the "prev page" link. (>prev page< 1 ... 6 7 [8] 9 10 ... 15 next page)
		if (!empty($start) && $show_prevnext)
			$pageindex = sprintf($base_link, $start - $num_per_page, '<span class="previous_page">' . $txt['prev'] . '</span>');
		else
			$pageindex = '';

		// Show the first page. (prev page >1< ... 6 7 [8] 9 10 ... 15)
		if ($start > $num_per_page * $PageContiguous)
			$pageindex .= sprintf($base_link, 0, '1');

		// Show the ... after the first page.  (prev page 1 >...< 6 7 [8] 9 10 ... 15 next page)
		if ($start > $num_per_page * ($PageContiguous + 1))
			$pageindex .= '<span class="expand_pages" onclick="' . htmlspecialchars('expandPages(this, ' . JavaScriptEscape(($flexible_start ? $base_url : strtr($base_url, array('%' => '%%')) . ';start=%1$d')) . ', ' . $num_per_page . ', ' . ($start - $num_per_page * $PageContiguous) . ', ' . $num_per_page . ');') . '" onmouseover="this.style.cursor = \'pointer\';"><strong> ... </strong></span>';

		// Show the pages before the current one. (prev page 1 ... >6 7< [8] 9 10 ... 15 next page)
		for ($nCont = $PageContiguous; $nCont >= 1; $nCont--)
			if ($start >= $num_per_page * $nCont)
			{
				$tmpStart = $start - $num_per_page * $nCont;
				$pageindex.= sprintf($base_link, $tmpStart, $tmpStart / $num_per_page + 1);
			}

		// Show the current page. (prev page 1 ... 6 7 >[8]< 9 10 ... 15 next page)
		if (!$start_invalid)
			$pageindex .= '<span class="current_page"><strong>' . ($start / $num_per_page + 1) . '</strong></span>';
		else
			$pageindex .= sprintf($base_link, $start, $start / $num_per_page + 1);

		// Show the pages after the current one... (prev page 1 ... 6 7 [8] >9 10< ... 15 next page)
		$tmpMaxPages = (int) (($max_value - 1) / $num_per_page) * $num_per_page;
		for ($nCont = 1; $nCont <= $PageContiguous; $nCont++)
			if ($start + $num_per_page * $nCont <= $tmpMaxPages)
			{
				$tmpStart = $start + $num_per_page * $nCont;
				$pageindex .= sprintf($base_link, $tmpStart, $tmpStart / $num_per_page + 1);
			}

		// Show the '...' part near the end. (prev page 1 ... 6 7 [8] 9 10 >...< 15 next page)
		if ($start + $num_per_page * ($PageContiguous + 1) < $tmpMaxPages)
			$pageindex .= '<span class="expand_pages" onclick="' . htmlspecialchars('expandPages(this, ' . JavaScriptEscape(($flexible_start ? $base_url : strtr($base_url, array('%' => '%%')) . ';start=%1$d')) . ', ' . ($start + $num_per_page * ($PageContiguous + 1)) . ', ' . $tmpMaxPages . ', ' . $num_per_page . ');') . '" onmouseover="this.style.cursor=\'pointer\';"><strong> ... </strong></span>';

		// Show the last number in the list. (prev page 1 ... 6 7 [8] 9 10 ... >15<  next page)
		if ($start + $num_per_page * $PageContiguous < $tmpMaxPages)
			$pageindex .= sprintf($base_link, $tmpMaxPages, $tmpMaxPages / $num_per_page + 1);

		// Show the "next page" link. (prev page 1 ... 6 7 [8] 9 10 ... 15 >next page<)
		if ($start != $tmpMaxPages && $show_prevnext)
			$pageindex .= sprintf($base_link, $start + $num_per_page, '<span class="next_page">' . $txt['next'] . '</span>');
	}

	return $pageindex;
}

/**
 * - Formats a number.
 * - uses the format of number_format to decide how to format the number.
 *   for example, it might display "1 234,50".
 * - caches the formatting data from the setting for optimization.
 *
 * @param float $number
 * @param bool $override_decimal_count = false
 */
function comma_format($number, $override_decimal_count = false)
{
	global $txt;
	static $thousands_separator = null, $decimal_separator = null, $decimal_count = null;

	// Cache these values...
	if ($decimal_separator === null)
	{
		// Not set for whatever reason?
		if (empty($txt['number_format']) || preg_match('~^1([^\d]*)?234([^\d]*)(0*?)$~', $txt['number_format'], $matches) != 1)
			return $number;

		// Cache these each load...
		$thousands_separator = $matches[1];
		$decimal_separator = $matches[2];
		$decimal_count = strlen($matches[3]);
	}

	// Format the string with our friend, number_format.
	return number_format($number, (float) $number === $number ? ($override_decimal_count === false ? $decimal_count : $override_decimal_count) : 0, $decimal_separator, $thousands_separator);
}

/**
 * Format a time to make it look purdy.
 *
 * - returns a pretty formated version of time based on the user's format in $user_info['time_format'].
 * - applies all necessary time offsets to the timestamp, unless offset_type is set.
 * - if todayMod is set and show_today was not not specified or true, an
 *   alternate format string is used to show the date with something to show it is "today" or "yesterday".
 * - performs localization (more than just strftime would do alone.)
 *
 * @param int $log_time
 * @param bool $show_today = true
 * @param string $offset_type = false
 */
function timeformat($log_time, $show_today = true, $offset_type = false)
{
	global $context, $user_info, $txt, $modSettings, $smcFunc;
	static $non_twelve_hour;

	// Offset the time.
	if (!$offset_type)
		$time = $log_time + ($user_info['time_offset'] + $modSettings['time_offset']) * 3600;
	// Just the forum offset?
	elseif ($offset_type == 'forum')
		$time = $log_time + $modSettings['time_offset'] * 3600;
	else
		$time = $log_time;

	// We can't have a negative date (on Windows, at least.)
	if ($log_time < 0)
		$log_time = 0;

	// Today and Yesterday?
	if ($modSettings['todayMod'] >= 1 && $show_today === true)
	{
		// Get the current time.
		$nowtime = forum_time();

		$then = @getdate($time);
		$now = @getdate($nowtime);

		// Try to make something of a time format string...
		$s = strpos($user_info['time_format'], '%S') === false ? '' : ':%S';
		if (strpos($user_info['time_format'], '%H') === false && strpos($user_info['time_format'], '%T') === false)
		{
			$h = strpos($user_info['time_format'], '%l') === false ? '%I' : '%l';
			$today_fmt = $h . ':%M' . $s . ' %p';
		}
		else
			$today_fmt = '%H:%M' . $s;

		// Same day of the year, same year.... Today!
		if ($then['yday'] == $now['yday'] && $then['year'] == $now['year'])
			return $txt['today'] . timeformat($log_time, $today_fmt, $offset_type);

		// Day-of-year is one less and same year, or it's the first of the year and that's the last of the year...
		if ($modSettings['todayMod'] == '2' && (($then['yday'] == $now['yday'] - 1 && $then['year'] == $now['year']) || ($now['yday'] == 0 && $then['year'] == $now['year'] - 1) && $then['mon'] == 12 && $then['mday'] == 31))
			return $txt['yesterday'] . timeformat($log_time, $today_fmt, $offset_type);
	}

	$str = !is_bool($show_today) ? $show_today : $user_info['time_format'];

	if (setlocale(LC_TIME, $txt['lang_locale']))
	{
		if (!isset($non_twelve_hour))
			$non_twelve_hour = trim(strftime('%p')) === '';
		if ($non_twelve_hour && strpos($str, '%p') !== false)
			$str = str_replace('%p', (strftime('%H', $time) < 12 ? $txt['time_am'] : $txt['time_pm']), $str);

		foreach (array('%a', '%A', '%b', '%B') as $token)
			if (strpos($str, $token) !== false)
				$str = str_replace($token, !empty($txt['lang_capitalize_dates']) ? $smcFunc['ucwords'](strftime($token, $time)) : strftime($token, $time), $str);
	}
	else
	{
		// Do-it-yourself time localization.  Fun.
		foreach (array('%a' => 'days_short', '%A' => 'days', '%b' => 'months_short', '%B' => 'months') as $token => $text_label)
			if (strpos($str, $token) !== false)
				$str = str_replace($token, $txt[$text_label][(int) strftime($token === '%a' || $token === '%A' ? '%w' : '%m', $time)], $str);

		if (strpos($str, '%p') !== false)
			$str = str_replace('%p', (strftime('%H', $time) < 12 ? $txt['time_am'] : $txt['time_pm']), $str);
	}

	// Windows doesn't support %e; on some versions, strftime fails altogether if used, so let's prevent that.
	if ($context['server']['is_windows'] && strpos($str, '%e') !== false)
		$str = str_replace('%e', ltrim(strftime('%d', $time), '0'), $str);

	// Format any other characters..
	return strftime($str, $time);
}

/**
 * Removes special entities from strings.  Compatibility...
 * Should be used instead of html_entity_decode for PHP version compatibility reasons.
 *
 * - removes the base entities (&lt;, &quot;, etc.) from text.
 * - additionally converts &nbsp; and &#039;.
 *
 * @param string $string
 * @return the string without entities
 */
function un_htmlspecialchars($string)
{
	static $translation = array();

	if (empty($translation))
		$translation = array_flip(get_html_translation_table(HTML_SPECIALCHARS, ENT_QUOTES)) + array('&#039;' => '\'', '&nbsp;' => ' ');

	return strtr($string, $translation);
}

/**
 * Shorten a subject + internationalization concerns.
 *
 * - shortens a subject so that it is either shorter than length, or that length plus an ellipsis.
 * - respects internationalization characters and entities as one character.
 * - avoids trailing entities.
 * - returns the shortened string.
 *
 * @param string $subject
 * @param int $len
 */
function shorten_subject($subject, $len)
{
	global $smcFunc;

	// It was already short enough!
	if ($smcFunc['strlen']($subject) <= $len)
		return $subject;

	// Shorten it by the length it was too long, and strip off junk from the end.
	return $smcFunc['substr']($subject, 0, $len) . '...';
}

/**
 * Gets the current time with offset.
 *
 * - always applies the offset in the time_offset setting.
 *
 * @param bool $use_user_offset = true if use_user_offset is true, applies the user's offset as well
 * @param int $timestamp = null
 * @return int seconds since the unix epoch
 */
function forum_time($use_user_offset = true, $timestamp = null)
{
	global $user_info, $modSettings;

	if ($timestamp === null)
		$timestamp = time();
	elseif ($timestamp == 0)
		return 0;

	return $timestamp + ($modSettings['time_offset'] + ($use_user_offset ? $user_info['time_offset'] : 0)) * 3600;
}

/**
 * Calculates all the possible permutations (orders) of array.
 * should not be called on huge arrays (bigger than like 10 elements.)
 * returns an array containing each permutation.
 *
 * @param array $array
 * @return array
 */
function permute($array)
{
	$orders = array($array);

	$n = count($array);
	$p = range(0, $n);
	for ($i = 1; $i < $n; null)
	{
		$p[$i]--;
		$j = $i % 2 != 0 ? $p[$i] : 0;

		$temp = $array[$i];
		$array[$i] = $array[$j];
		$array[$j] = $temp;

		for ($i = 1; $p[$i] == 0; $i++)
			$p[$i] = 1;

		$orders[] = $array;
	}

	return $orders;
}

/**
 * Parse bulletin board code in a string, as well as smileys optionally.
 *
 * - only parses bbc tags which are not disabled in disabledBBC.
 * - handles basic HTML, if enablePostHTML is on.
 * - caches the from/to replace regular expressions so as not to reload them every time a string is parsed.
 * - only parses smileys if smileys is true.
 * - does nothing if the enableBBC setting is off.
 * - uses the cache_id as a unique identifier to facilitate any caching it may do.
 *  -returns the modified message.
 *
 * @param string $message
 * @param bool $smileys = true
 * @param string $cache_id = ''
 * @param array $parse_tags = null
 * @return string
 */
function parse_bbc($message, $smileys = true, $cache_id = '', $parse_tags = array())
{
	global $txt, $scripturl, $context, $modSettings, $user_info, $smcFunc;
	static $bbc_codes = array(), $itemcodes = array(), $no_autolink_tags = array();
	static $disabled;

	// Don't waste cycles
	if ($message === '')
		return '';

	// Just in case it wasn't determined yet whether UTF-8 is enabled.
	if (!isset($context['utf8']))
		$context['utf8'] = (empty($modSettings['global_character_set']) ? $txt['lang_character_set'] : $modSettings['global_character_set']) === 'UTF-8';

	// Clean up any cut/paste issues we may have
	$message = sanitizeMSCutPaste($message);

	// If the load average is too high, don't parse the BBC.
	if (!empty($context['load_average']) && !empty($modSettings['bbc']) && $context['load_average'] >= $modSettings['bbc'])
	{
		$context['disabled_parse_bbc'] = true;
		return $message;
	}

	// Never show smileys for wireless clients.  More bytes, can't see it anyway :P.
	if (WIRELESS)
		$smileys = false;
	elseif ($smileys !== null && ($smileys == '1' || $smileys == '0'))
		$smileys = (bool) $smileys;

	if (empty($modSettings['enableBBC']) && $message !== false)
	{
		if ($smileys === true)
			parsesmileys($message);

		return $message;
	}

	// If we are not doing every tag then we don't cache this run.
	if (!empty($parse_tags) && !empty($bbc_codes))
	{
		$temp_bbc = $bbc_codes;
		$bbc_codes = array();
	}

	// Allow mods access before entering the main parse_bbc loop
	call_integration_hook('integrate_pre_parsebbc', array($message, $smileys, $cache_id, $parse_tags));

	// Sift out the bbc for a performance improvement.
	if (empty($bbc_codes) || $message === false || !empty($parse_tags))
	{
		if (!empty($modSettings['disabledBBC']))
		{
			$temp = explode(',', strtolower($modSettings['disabledBBC']));

			foreach ($temp as $tag)
				$disabled[trim($tag)] = true;
		}

		if (empty($modSettings['enableEmbeddedFlash']))
			$disabled['flash'] = true;

		/* The following bbc are formatted as an array, with keys as follows:

			tag: the tag's name - should be lowercase!

			type: one of...
				- (missing): [tag]parsed content[/tag]
				- unparsed_equals: [tag=xyz]parsed content[/tag]
				- parsed_equals: [tag=parsed data]parsed content[/tag]
				- unparsed_content: [tag]unparsed content[/tag]
				- closed: [tag], [tag/], [tag /]
				- unparsed_commas: [tag=1,2,3]parsed content[/tag]
				- unparsed_commas_content: [tag=1,2,3]unparsed content[/tag]
				- unparsed_equals_content: [tag=...]unparsed content[/tag]

			parameters: an optional array of parameters, for the form
			  [tag abc=123]content[/tag].  The array is an associative array
			  where the keys are the parameter names, and the values are an
			  array which may contain the following:
				- match: a regular expression to validate and match the value.
				- quoted: true if the value should be quoted.
				- validate: callback to evaluate on the data, which is $data.
				- value: a string in which to replace $1 with the data.
				  either it or validate may be used, not both.
				- optional: true if the parameter is optional.

			test: a regular expression to test immediately after the tag's
			  '=', ' ' or ']'.  Typically, should have a \] at the end.
			  Optional.

			content: only available for unparsed_content, closed,
			  unparsed_commas_content, and unparsed_equals_content.
			  $1 is replaced with the content of the tag.  Parameters
			  are replaced in the form {param}.  For unparsed_commas_content,
			  $2, $3, ..., $n are replaced.

			before: only when content is not used, to go before any
			  content.  For unparsed_equals, $1 is replaced with the value.
			  For unparsed_commas, $1, $2, ..., $n are replaced.

			after: similar to before in every way, except that it is used
			  when the tag is closed.

			disabled_content: used in place of content when the tag is
			  disabled.  For closed, default is '', otherwise it is '$1' if
			  block_level is false, '<div>$1</div>' elsewise.

			disabled_before: used in place of before when disabled.  Defaults
			  to '<div>' if block_level, '' if not.

			disabled_after: used in place of after when disabled.  Defaults
			  to '</div>' if block_level, '' if not.

			block_level: set to true the tag is a "block level" tag, similar
			  to HTML.  Block level tags cannot be nested inside tags that are
			  not block level, and will not be implicitly closed as easily.
			  One break following a block level tag may also be removed.

			trim: if set, and 'inside' whitespace after the begin tag will be
			  removed.  If set to 'outside', whitespace after the end tag will
			  meet the same fate.

			validate: except when type is missing or 'closed', a callback to
			  validate the data as $data.  Depending on the tag's type, $data
			  may be a string or an array of strings (corresponding to the
			  replacement.)

			quoted: when type is 'unparsed_equals' or 'parsed_equals' only,
			  may be not set, 'optional', or 'required' corresponding to if
			  the content may be quoted.  This allows the parser to read
			  [tag="abc]def[esdf]"] properly.

			require_parents: an array of tag names, or not set.  If set, the
			  enclosing tag *must* be one of the listed tags, or parsing won't
			  occur.

			require_children: similar to require_parents, if set children
			  won't be parsed if they are not in the list.

			disallow_children: similar to, but very different from,
			  require_children, if it is set the listed tags will not be
			  parsed inside the tag.

			parsed_tags_allowed: an array restricting what BBC can be in the
			  parsed_equals parameter, if desired.
		*/

		$codes = array(
			array(
				'tag' => 'abbr',
				'type' => 'unparsed_equals',
				'before' => '<abbr title="$1">',
				'after' => '</abbr>',
				'quoted' => 'optional',
				'disabled_after' => ' ($1)',
			),
			array(
				'tag' => 'acronym',
				'type' => 'unparsed_equals',
				'before' => '<acronym title="$1">',
				'after' => '</acronym>',
				'quoted' => 'optional',
				'disabled_after' => ' ($1)',
			),
			array(
				'tag' => 'anchor',
				'type' => 'unparsed_equals',
				'test' => '[#]?([A-Za-z][A-Za-z0-9_\-]*)\]',
				'before' => '<span id="post_$1">',
				'after' => '</span>',
			),
			array(
				'tag' => 'b',
				'before' => '<strong>',
				'after' => '</strong>',
			),
			array(
				'tag' => 'bdo',
				'type' => 'unparsed_equals',
				'before' => '<bdo dir="$1">',
				'after' => '</bdo>',
				'test' => '(rtl|ltr)\]',
				'block_level' => true,
			),
			array(
				'tag' => 'black',
				'before' => '<span style="color: black;" class="bbc_color">',
				'after' => '</span>',
			),
			array(
				'tag' => 'blue',
				'before' => '<span style="color: blue;" class="bbc_color">',
				'after' => '</span>',
			),
			array(
				'tag' => 'br',
				'type' => 'closed',
				'content' => '<br />',
			),
			array(
				'tag' => 'center',
				'before' => '<div align="center">',
				'after' => '</div>',
				'block_level' => true,
			),
			array(
				'tag' => 'code',
				'type' => 'unparsed_content',
				'content' => '<div class="codeheader">' . $txt['code'] . ': <a href="javascript:void(0);" onclick="return smfSelectText(this);" class="codeoperation">' . $txt['code_select'] . '</a></div>' . (isBrowser('gecko') || isBrowser('opera') ? '<pre style="margin: 0; padding: 0;">' : '') . '<code class="bbc_code">$1</code>' . (isBrowser('gecko') || isBrowser('opera') ? '</pre>' : ''),
				// @todo Maybe this can be simplified?
				'validate' => isset($disabled['code']) ? null : create_function('&$tag, &$data, $disabled', '
					global $context;

					if (!isset($disabled[\'code\']))
					{
						$php_parts = preg_split(\'~(&lt;\?php|\?&gt;)~\', $data, -1, PREG_SPLIT_DELIM_CAPTURE);

						for ($php_i = 0, $php_n = count($php_parts); $php_i < $php_n; $php_i++)
						{
							// Do PHP code coloring?
							if ($php_parts[$php_i] != \'&lt;?php\')
								continue;

							$php_string = \'\';
							while ($php_i + 1 < count($php_parts) && $php_parts[$php_i] != \'?&gt;\')
							{
								$php_string .= $php_parts[$php_i];
								$php_parts[$php_i++] = \'\';
							}
							$php_parts[$php_i] = highlight_php_code($php_string . $php_parts[$php_i]);
						}

						// Fix the PHP code stuff...
						$data = str_replace("<pre style=\"display: inline;\">\t</pre>", "\t", implode(\'\', $php_parts));
						$data = str_replace("\t", "<span style=\"white-space: pre;\">\t</span>", $data);

						// Recent Opera bug requiring temporary fix. &nsbp; is needed before </code> to avoid broken selection.
						if ($context[\'browser\'][\'is_opera\'])
							$data .= \'&nbsp;\';
					}'),
				'block_level' => true,
			),
			array(
				'tag' => 'code',
				'type' => 'unparsed_equals_content',
				'content' => '<div class="codeheader">' . $txt['code'] . ': ($2) <a href="#" onclick="return smfSelectText(this);" class="codeoperation">' . $txt['code_select'] . '</a></div>' . (isBrowser('gecko') || isBrowser('opera') ? '<pre style="margin: 0; padding: 0;">' : '') . '<code class="bbc_code">$1</code>' . (isBrowser('gecko') || isBrowser('opera') ? '</pre>' : ''),
				// @todo Maybe this can be simplified?
				'validate' => isset($disabled['code']) ? null : create_function('&$tag, &$data, $disabled', '
					global $context;

					if (!isset($disabled[\'code\']))
					{
						$php_parts = preg_split(\'~(&lt;\?php|\?&gt;)~\', $data[0], -1, PREG_SPLIT_DELIM_CAPTURE);

						for ($php_i = 0, $php_n = count($php_parts); $php_i < $php_n; $php_i++)
						{
							// Do PHP code coloring?
							if ($php_parts[$php_i] != \'&lt;?php\')
								continue;

							$php_string = \'\';
							while ($php_i + 1 < count($php_parts) && $php_parts[$php_i] != \'?&gt;\')
							{
								$php_string .= $php_parts[$php_i];
								$php_parts[$php_i++] = \'\';
							}
							$php_parts[$php_i] = highlight_php_code($php_string . $php_parts[$php_i]);
						}

						// Fix the PHP code stuff...
						$data[0] = str_replace("<pre style=\"display: inline;\">\t</pre>", "\t", implode(\'\', $php_parts));
						$data[0] = str_replace("\t", "<span style=\"white-space: pre;\">\t</span>", $data[0]);

						// Recent Opera bug requiring temporary fix. &nsbp; is needed before </code> to avoid broken selection.
						if ($context[\'browser\'][\'is_opera\'])
							$data[0] .= \'&nbsp;\';
					}'),
				'block_level' => true,
			),
			array(
				'tag' => 'color',
				'type' => 'unparsed_equals',
				'test' => '(#[\da-fA-F]{3}|#[\da-fA-F]{6}|[A-Za-z]{1,20}|rgb\(\d{1,3}, ?\d{1,3}, ?\d{1,3}\))\]',
				'before' => '<span style="color: $1;" class="bbc_color">',
				'after' => '</span>',
			),
			array(
				'tag' => 'email',
				'type' => 'unparsed_content',
				'content' => '<a href="mailto:$1" class="bbc_email">$1</a>',
				// @todo Should this respect guest_hideContacts?
				'validate' => create_function('&$tag, &$data, $disabled', '$data = strtr($data, array(\'<br />\' => \'\'));'),
			),
			array(
				'tag' => 'email',
				'type' => 'unparsed_equals',
				'before' => '<a href="mailto:$1" class="bbc_email">',
				'after' => '</a>',
				// @todo Should this respect guest_hideContacts?
				'disallow_children' => array('email', 'ftp', 'url', 'iurl'),
				'disabled_after' => ' ($1)',
			),
			array(
				'tag' => 'flash',
				'type' => 'unparsed_commas_content',
				'test' => '\d+,\d+\]',
				'content' => (isBrowser('ie') ? '<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="$2" height="$3"><param name="movie" value="$1" /><param name="play" value="true" /><param name="loop" value="true" /><param name="quality" value="high" /><param name="AllowScriptAccess" value="never" /><embed src="$1" width="$2" height="$3" play="true" loop="true" quality="high" AllowScriptAccess="never" /><noembed><a href="$1" target="_blank" class="new_win">$1</a></noembed></object>' : '<embed type="application/x-shockwave-flash" src="$1" width="$2" height="$3" play="true" loop="true" quality="high" AllowScriptAccess="never" /><noembed><a href="$1" target="_blank" class="new_win">$1</a></noembed>'),
				'validate' => create_function('&$tag, &$data, $disabled', '
					if (isset($disabled[\'url\']))
						$tag[\'content\'] = \'$1\';
					elseif (strpos($data[0], \'http://\') !== 0 && strpos($data[0], \'https://\') !== 0)
						$data[0] = \'http://\' . $data[0];
				'),
				'disabled_content' => '<a href="$1" target="_blank" class="new_win">$1</a>',
			),
			array(
				'tag' => 'font',
				'type' => 'unparsed_equals',
				'test' => '[A-Za-z0-9_,\-\s]+?\]',
				'before' => '<span style="font-family: $1;" class="bbc_font">',
				'after' => '</span>',
			),
			array(
				'tag' => 'ftp',
				'type' => 'unparsed_content',
				'content' => '<a href="$1" class="bbc_ftp new_win" target="_blank">$1</a>',
				'validate' => create_function('&$tag, &$data, $disabled', '
					$data = strtr($data, array(\'<br />\' => \'\'));
					if (strpos($data, \'ftp://\') !== 0 && strpos($data, \'ftps://\') !== 0)
						$data = \'ftp://\' . $data;
				'),
			),
			array(
				'tag' => 'ftp',
				'type' => 'unparsed_equals',
				'before' => '<a href="$1" class="bbc_ftp new_win" target="_blank">',
				'after' => '</a>',
				'validate' => create_function('&$tag, &$data, $disabled', '
					if (strpos($data, \'ftp://\') !== 0 && strpos($data, \'ftps://\') !== 0)
						$data = \'ftp://\' . $data;
				'),
				'disallow_children' => array('email', 'ftp', 'url', 'iurl'),
				'disabled_after' => ' ($1)',
			),
			array(
				'tag' => 'glow',
				'type' => 'unparsed_commas',
				'test' => '[#0-9a-zA-Z\-]{3,12},([012]\d{1,2}|\d{1,2})(,[^]]+)?\]',
				'before' => isBrowser('ie') ? '<table border="0" cellpadding="0" cellspacing="0" style="display: inline; vertical-align: middle; font: inherit;"><tr><td style="filter: Glow(color=$1, strength=$2); font: inherit;">' : '<span style="text-shadow: $1 1px 1px 1px">',
				'after' => isBrowser('ie') ? '</td></tr></table> ' : '</span>',
			),
			array(
				'tag' => 'green',
				'before' => '<span style="color: green;" class="bbc_color">',
				'after' => '</span>',
			),
			array(
				'tag' => 'html',
				'type' => 'unparsed_content',
				'content' => '$1',
				'block_level' => true,
				'disabled_content' => '$1',
			),
			array(
				'tag' => 'hr',
				'type' => 'closed',
				'content' => '<hr />',
				'block_level' => true,
			),
			array(
				'tag' => 'i',
				'before' => '<em>',
				'after' => '</em>',
			),
			array(
				'tag' => 'img',
				'type' => 'unparsed_content',
				'parameters' => array(
					'alt' => array('optional' => true),
					'width' => array('optional' => true, 'value' => ' width="$1"', 'match' => '(\d+)'),
					'height' => array('optional' => true, 'value' => ' height="$1"', 'match' => '(\d+)'),
				),
				'content' => '<img src="$1" alt="{alt}"{width}{height} class="bbc_img resized" />',
				'validate' => create_function('&$tag, &$data, $disabled', '
					$data = strtr($data, array(\'<br />\' => \'\'));
					if (strpos($data, \'http://\') !== 0 && strpos($data, \'https://\') !== 0)
						$data = \'http://\' . $data;
				'),
				'disabled_content' => '($1)',
			),
			array(
				'tag' => 'img',
				'type' => 'unparsed_content',
				'content' => '<img src="$1" alt="" class="bbc_img" />',
				'validate' => create_function('&$tag, &$data, $disabled', '
					$data = strtr($data, array(\'<br />\' => \'\'));
					if (strpos($data, \'http://\') !== 0 && strpos($data, \'https://\') !== 0)
						$data = \'http://\' . $data;
				'),
				'disabled_content' => '($1)',
			),
			array(
				'tag' => 'iurl',
				'type' => 'unparsed_content',
				'content' => '<a href="$1" class="bbc_link">$1</a>',
				'validate' => create_function('&$tag, &$data, $disabled', '
					$data = strtr($data, array(\'<br />\' => \'\'));
					if (strpos($data, \'http://\') !== 0 && strpos($data, \'https://\') !== 0)
						$data = \'http://\' . $data;
				'),
			),
			array(
				'tag' => 'iurl',
				'type' => 'unparsed_equals',
				'before' => '<a href="$1" class="bbc_link">',
				'after' => '</a>',
				'validate' => create_function('&$tag, &$data, $disabled', '
					if (substr($data, 0, 1) == \'#\')
						$data = \'#post_\' . substr($data, 1);
					elseif (strpos($data, \'http://\') !== 0 && strpos($data, \'https://\') !== 0)
						$data = \'http://\' . $data;
				'),
				'disallow_children' => array('email', 'ftp', 'url', 'iurl'),
				'disabled_after' => ' ($1)',
			),
			array(
				'tag' => 'left',
				'before' => '<div style="text-align: left;">',
				'after' => '</div>',
				'block_level' => true,
			),
			array(
				'tag' => 'li',
				'before' => '<li>',
				'after' => '</li>',
				'trim' => 'outside',
				'require_parents' => array('list'),
				'block_level' => true,
				'disabled_before' => '',
				'disabled_after' => '<br />',
			),
			array(
				'tag' => 'list',
				'before' => '<ul class="bbc_list">',
				'after' => '</ul>',
				'trim' => 'inside',
				'require_children' => array('li', 'list'),
				'block_level' => true,
			),
			array(
				'tag' => 'list',
				'parameters' => array(
					'type' => array('match' => '(none|disc|circle|square|decimal|decimal-leading-zero|lower-roman|upper-roman|lower-alpha|upper-alpha|lower-greek|lower-latin|upper-latin|hebrew|armenian|georgian|cjk-ideographic|hiragana|katakana|hiragana-iroha|katakana-iroha)'),
				),
				'before' => '<ul class="bbc_list" style="list-style-type: {type};">',
				'after' => '</ul>',
				'trim' => 'inside',
				'require_children' => array('li'),
				'block_level' => true,
			),
			array(
				'tag' => 'ltr',
				'before' => '<div dir="ltr">',
				'after' => '</div>',
				'block_level' => true,
			),
			array(
				'tag' => 'me',
				'type' => 'unparsed_equals',
				'before' => '<div class="meaction">* $1 ',
				'after' => '</div>',
				'quoted' => 'optional',
				'block_level' => true,
				'disabled_before' => '/me ',
				'disabled_after' => '<br />',
			),
			array(
				'tag' => 'move',
				'before' => '<marquee>',
				'after' => '</marquee>',
				'block_level' => true,
				'disallow_children' => array('move'),
			),
			array(
				'tag' => 'nobbc',
				'type' => 'unparsed_content',
				'content' => '$1',
			),
			array(
				'tag' => 'php',
				'type' => 'unparsed_content',
				'content' => '<span class="phpcode">$1</span>',
				'validate' => isset($disabled['php']) ? null : create_function('&$tag, &$data, $disabled', '
					if (!isset($disabled[\'php\']))
					{
						$add_begin = substr(trim($data), 0, 5) != \'&lt;?\';
						$data = highlight_php_code($add_begin ? \'&lt;?php \' . $data . \'?&gt;\' : $data);
						if ($add_begin)
							$data = preg_replace(array(\'~^(.+?)&lt;\?.{0,40}?php(?:&nbsp;|\s)~\', \'~\?&gt;((?:</(font|span)>)*)$~\'), \'$1\', $data, 2);
					}'),
				'block_level' => false,
				'disabled_content' => '$1',
			),
			array(
				'tag' => 'pre',
				'before' => '<pre>',
				'after' => '</pre>',
			),
			array(
				'tag' => 'quote',
				'before' => '<div class="quoteheader"><div class="topslice_quote">' . $txt['quote'] . '</div></div><blockquote>',
				'after' => '</blockquote><div class="quotefooter"><div class="botslice_quote"></div></div>',
				'block_level' => true,
			),
			array(
				'tag' => 'quote',
				'parameters' => array(
					'author' => array('match' => '(.{1,192}?)', 'quoted' => true),
				),
				'before' => '<div class="quoteheader"><div class="topslice_quote">' . $txt['quote_from'] . ': {author}</div></div><blockquote>',
				'after' => '</blockquote><div class="quotefooter"><div class="botslice_quote"></div></div>',
				'block_level' => true,
			),
			array(
				'tag' => 'quote',
				'type' => 'parsed_equals',
				'before' => '<div class="quoteheader"><div class="topslice_quote">' . $txt['quote_from'] . ': $1</div></div><blockquote>',
				'after' => '</blockquote><div class="quotefooter"><div class="botslice_quote"></div></div>',
				'quoted' => 'optional',
				// Don't allow everything to be embedded with the author name.
				'parsed_tags_allowed' => array('url', 'iurl', 'ftp'),
				'block_level' => true,
			),
			array(
				'tag' => 'quote',
				'parameters' => array(
					'author' => array('match' => '([^<>]{1,192}?)'),
					'link' => array('match' => '(?:board=\d+;)?((?:topic|threadid)=[\dmsg#\./]{1,40}(?:;start=[\dmsg#\./]{1,40})?|action=profile;u=\d+)'),
					'date' => array('match' => '(\d+)', 'validate' => 'timeformat'),
				),
				'before' => '<div class="quoteheader"><div class="topslice_quote"><a href="' . $scripturl . '?{link}">' . $txt['quote_from'] . ': {author} ' . $txt['search_on'] . ' {date}</a></div></div><blockquote>',
				'after' => '</blockquote><div class="quotefooter"><div class="botslice_quote"></div></div>',
				'block_level' => true,
			),
			array(
				'tag' => 'quote',
				'parameters' => array(
					'author' => array('match' => '(.{1,192}?)'),
				),
				'before' => '<div class="quoteheader"><div class="topslice_quote">' . $txt['quote_from'] . ': {author}</div></div><blockquote>',
				'after' => '</blockquote><div class="quotefooter"><div class="botslice_quote"></div></div>',
				'block_level' => true,
			),
			array(
				'tag' => 'red',
				'before' => '<span s…