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Hi. I have been working on my forums wich now i suddenly get this error whenever i click on a topic that was posted on a forum but from the front page.

Quote:Warning: Cannot modify header information - headers already sent by (output started at /home/destinyo/public_html/DAC/Upload/showthread.php:5) in /home/destinyo/public_html/DAC/Upload/showthread.php on line 172

this is My site. Please if anyone can help with this problem. Click on the forums button to view.
Did you modify the file showthread.php?
well i think you have edited your showthread.php file with some HTML codings, that is why it displays the error.
Hmm.. well is there any solution? other than to remove the menu?
What's the code that you had in showthread.php?
DennisTT Wrote:What's the code that you had in showthread.php?

Here it is. Little Long.

<html>
<head>
<title>Dsite12</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">
<!--
body {
	background-image: url(/DAC/images/background.png);
}
.style1 {color: #FFFFFF}
.style2 {font-family: Verdana, Arial, Helvetica, sans-serif}
body,td,th {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	color: #000000;
	font-size: 10px;
}
.style3 {
	font-size: 10px;
	color: #75684A;
}
.style5 {
	font-size: 18px;
	font-weight: bold;
}
-->
</style></head>
<body bgcolor="#FFFFFF" leftmargin="0" topmargin="0" marginwidth="0" marginheight="0">
<!-- ImageReady Slices (Dsite12.psd) -->
<table width="1066" height="769" border="0" align="center" cellpadding="0" cellspacing="0" id="Table_01">
  <!--DWLayoutTable-->
	<tr>
		<td height="185" colspan="6">
			<img src="/DAC/images/index_01.gif" width="867" height="185" alt=""></td>
		<td width="198" rowspan="3"></td>
	    <td width="33"></td>
	</tr>
	<tr>
		<td width="114" height="46" valign="top">		  <a href="DAC/DAC/index.php"><img src="/DAC/images/Dsite12_03.gif" alt="Home" width="114" height="46" border="0"></a></td>
		<td width="123" valign="top"><a href="http://www.destinyonline.champshost.com/DAC/Upload/index.php"><img src="/DAC/images/Dsite12_04.gif" alt="Forums" width="123" height="46" border="0"></a></td>
		<td width="147" valign="top"><a href="http://www.destinyonline.champshost.com/DAC/Upload/member.php?action=register"><img src="/DAC/images/Dsite12_05.gif" alt="d" width="147" height="46" border="0"></a></td>
		<td width="145" valign="top"><a href="DAC/DAC/downloads.php"><img src="/DAC/images/Dsite12_06.gif" alt="dfr" width="145" height="46" border="0"></a></td>
		<td width="149" valign="top"><a href="DAC/DAC/teamspeak.php"><img src="/DAC/images/Dsite12_07.gif" alt="dfg" width="149" height="41" border="0"></a></td>
		<td width="189" valign="top">
		<a href="DAC/DAC/admin.php"></a><img src="/DAC/images/Dsite12_08.gif" width="189" height="41" alt="defg"></td>
	    <td></td>
	</tr>
	
	
	<tr>
		<td height="537" colspan="6" valign="top"><table width="100%" border="0" cellpadding="0" cellspacing="0">
		  <!--DWLayoutTable-->
		  <tr>
		    <td width="867" height="537" align="center" valign="top"><?php
/**
 * MyBB 1.2
 * Copyright © 2006 MyBB Group, All Rights Reserved
 *
 * Website: http://www.mybboard.com
 * License: http://www.mybboard.com/eula.html
 *
 * $Id: showthread.php 2263 2006-09-26 09:24:25Z chris $
 */

define("IN_MYBB", 1);

$templatelist = "showthread,postbit,postbit_author_user,postbit_author_guest,showthread_newthread,showthread_newreply,showthread_newreply_closed,postbit_sig,showthread_newpoll,postbit_avatar,postbit_profile,postbit_find,postbit_pm,postbit_www,postbit_email,postbit_edit,postbit_quote,postbit_report,postbit_signature, postbit_online,postbit_offline,postbit_away,showthread_ratingdisplay,showthread_ratethread,showthread_moderationoptions";
$templatelist .= ",multipage_prevpage,multipage_nextpage,multipage_page_current,multipage_page,multipage_start,multipage_end,multipage";
$templatelist .= ",postbit_editedby,showthread_similarthreads,showthread_similarthreads_bit,postbit_iplogged_show,postbit_iplogged_hiden,showthread_quickreply";
$templatelist .= ",forumjump_advanced,forumjump_special,forumjump_bit,showthread_multipage,postbit_reputation,postbit_quickdelete,postbit_attachments,thumbnails_thumbnail,postbit_attachments_attachment,postbit_attachments_thumbnails,postbit_attachments_images_image,postbit_attachments_images,postbit_posturl";
$templatelist .= ",postbit_inlinecheck,showthread_inlinemoderation,postbit_attachments_thumbnails_thumbnail,postbit_quickquote,postbit_qqmessage,postbit_seperator,postbit_groupimage,postbit_multiquote";

require_once "./global.php";
require_once MYBB_ROOT."inc/functions_post.php";
require_once MYBB_ROOT."inc/class_parser.php";
$parser = new postParser;

// Load global language phrases
$lang->load("showthread");

// If there is no tid but a pid, trick the system into thinking there was a tid anyway.
if($mybb->input['pid'] && !$mybb->input['tid'])
{
	$options = array(
		"limit" => 1
	);
	$query = $db->simple_select(TABLE_PREFIX."posts", "tid", "pid=".$mybb->input['pid'], $options);
	$post = $db->fetch_array($query);
	$mybb->input['tid'] = $post['tid'];
}

// Get the thread details from the database.
$options = array(
	"limit" => 1
);
$query = $db->simple_select(TABLE_PREFIX."threads", "*", "tid='".$mybb->input['tid']."' AND closed NOT LIKE 'moved|%'");
$thread = $db->fetch_array($query);
$thread['subject'] = htmlspecialchars_uni($parser->parse_badwords($thread['subject']));
$tid = $thread['tid'];
$fid = $thread['fid'];

// Is the currently logged in user a moderator of this forum?
if(is_moderator($fid) == "yes")
{
	$ismod = true;
}
else
{
	$ismod = false;
}

// Make sure we are looking at a real thread here.
if(!$thread['tid'] || ($thread['visible'] == 0 && $ismod == false) || ($thread['visible'] > 1 && $ismod == true))
{
	error($lang->error_invalidthread);
}

$archive_url = build_archive_link("thread", $tid);

// Build the navigation.
build_forum_breadcrumb($fid);
add_breadcrumb($thread['subject'], "showthread.php?tid=$tid");

// Does the thread belong to a valid forum?
$forum = get_forum($fid);
if(!$forum || $forum['type'] != "f")
{
	error($lang->error_invalidforum);
}

// Does the user have permission to view this thread?
$forumpermissions = forum_permissions($forum['fid']);

if($forumpermissions['canview'] != "yes" || $forumpermissions['canviewthreads'] != "yes")
{
	error_no_permission();
}

// Check that this forum is not password protected.
check_forum_password($forum['fid'], $forum['password']);

// If there is no specific action, we must be looking at the thread.
if(!$mybb->input['action'])
{
	$mybb->input['action'] = "thread";
}

// Jump to the last post.
if($mybb->input['action'] == "lastpost")
{
	if(strstr($thread['closed'], "moved|"))
	{
		$query = $db->query("
			SELECT p.pid
			FROM ".TABLE_PREFIX."posts p, ".TABLE_PREFIX."threads t
			WHERE t.fid='".$thread['fid']."' AND t.closed NOT LIKE 'moved|%' AND p.tid=t.tid
			ORDER BY p.dateline DESC
			LIMIT 0, 1
		");
		$pid = $db->fetch_field($query, "pid");
	}
	else
	{
		$options = array(
			'order_by' => 'dateline',
			'order_dir' => 'desc',
			'limit_start' => 0,
			'limit' => 1
		);
		$query = $db->simple_select(TABLE_PREFIX.'posts', 'pid', "tid={$tid}", $options);
		$pid = $db->fetch_field($query, "pid");
	}
	header("Location:showthread.php?tid=$nextthread[tid]&pid=$pid");
	exit;
}

// Jump to the next newest posts.
if($mybb->input['action'] == "nextnewest")
{
	$options = array(
		"limit_start" => 0,
		"limit" => 1,
		"order_by" => "lastpost"
	);
	$query = $db->simple_select(TABLE_PREFIX.'threads', '*', "fid={$thread['fid']} AND lastpost > {$thread['lastpost']} AND visible=1 AND closed NOT LIKE 'moved|%'", $options);
	$nextthread = $db->fetch_array($query);

	// Are there actually next newest posts?
	if(!$nextthread['tid'])
	{
		error($lang->error_nonextnewest);
	}
	$options = array(
		"limit_start" => 0,
		"limit" => 1,
		"order_by" => "dateline",
		"order_dir" => "desc"
	);
	$query = $db->simple_select(TABLE_PREFIX.'posts', 'pid', "tid={$nextthread['tid']}");

	// Redirect to the proper page.
	$pid = $db->fetch_field($query, "pid");
	header("Location:showthread.php?tid={$nextthread['tid']}&pid={$pid}#pid{$pid}");
}

// Jump to the next oldest posts.
if($mybb->input['action'] == "nextoldest")
{
	$options = array(
		"limit" => 1,
		"limit_start" => 0,
		"order_by" => "lastpost",
		"order_dir" => "desc"
	);
	$query = $db->simple_select(TABLE_PREFIX."threads", "*", "fid=".$thread['fid']." AND lastpost < ".$thread['lastpost']." AND visible=1 AND closed NOT LIKE 'moved|%'", $options);
	$nextthread = $db->fetch_array($query);

	// Are there actually next oldest posts?
	if(!$nextthread['tid'])
	{
		error($lang->error_nonextoldest);
	}
	$options = array(
		"limit_start" => 0,
		"limit" => 1,
		"order_by" => "dateline",
		"order_dir" => "desc"
	);
	$query = $db->simple_select(TABLE_PREFIX."posts", "pid", "tid=".$nextthread['tid']);

	// Redirect to the proper page.
	$pid = $db->fetch_field($query, "pid");
	header("Location:showthread.php?tid=$nextthread[tid]&pid=$pid#pid$pid");
}

// Jump to the unread posts.
if($mybb->input['action'] == "newpost")
{
	// First, figure out what time the thread or forum were last read
	$query = $db->simple_select(TABLE_PREFIX."threadsread", "dateline", "uid='{$mybb->user['uid']}' AND tid='{$thread['tid']}'");
	$thread_read = $db->fetch_field($query, "dateline");

	// Get forum read date
	$forumread = my_get_array_cookie("forumread", $fid);

	// If last visit is greater than forum read, change forum read date
	if($mybb->user['lastvisit'] > $forumread)
	{
		$forumread = $mybb->user['lastvisit'];
	}
	if($mybb->settings['threadreadcut'] > 0 && $mybb->user['uid'] && $thread['lastpost'] > $forumread)
	{
		$cutoff = time()-$mybb->settings['threadreadcut']*60*60*24;
		if($thread['lastpost'] > $cutoff)
		{
			if($thread_read)
			{
				$lastread = $thread_read;
			}
			else
			{
				$lastread = 1;
			}
		}
	}
	if(!$lastread)
	{
		$readcookie = $threadread = my_get_array_cookie("threadread", $thread['tid']);
		if($readcookie > $forumread)
		{
			$lastread = $readcookie;
		}
		else
		{
			$lastread = $forumread;
		}
	}
	// Next, find the proper pid to link to.
	$options = array(
		"limit_start" => 0,
		"limit" => 1,
		"order_by" => "dateline",
		"order_dir" => "asc"
	);
	$query = $db->simple_select(TABLE_PREFIX."posts", "pid", "tid=".$tid." AND dateline > '{$lastread}'");
	$newpost = $db->fetch_array($query);
	if($newpost['pid'])
	{
		header("Location:showthread.php?tid={$tid}&pid={$newpost['pid']}#pid{$newpost['pid']}");
	}
	else
	{
		header("Location:showthread.php?action=lastpost&tid={$tid}");
	}
}

$plugins->run_hooks("showthread_start");

// Show the entire thread (taking into account pagination).
if($mybb->input['action'] == "thread")
{
	if($thread['firstpost'] == 0)
	{
		update_first_post($tid);
	}
	// Does this thread have a poll?
	if($thread['poll'])
	{
		$options = array(
			"limit" => 1
		);
		$query = $db->simple_select(TABLE_PREFIX."polls", "*", "pid='".$thread['poll']."'");
		$poll = $db->fetch_array($query);
		$poll['timeout'] = $poll['timeout']*60*60*24;
		$expiretime = $poll['dateline'] + $poll['timeout'];
		$now = time();

		// If the poll or the thread is closed or if the poll is expired, show the results.
		if($poll['closed'] == "yes" || $thread['closed'] == "yes" || ($expiretime < $now && $poll['timeout'] > 0))
		{
			$showresults = 1;
		}

		// If the user is not a guest, check if he already voted.
		if($mybb->user['uid'] != 0)
		{
			$query = $db->simple_select(TABLE_PREFIX."pollvotes", "*", "uid='".$mybb->user['uid']."' AND pid='".$poll['pid']."'");
			while($votecheck = $db->fetch_array($query))
			{
				$alreadyvoted = 1;
				$votedfor[$votecheck['voteoption']] = 1;
			}
		}
		else
		{
			if($_COOKIE['pollvotes'][$poll['pid']])
			{
				$alreadyvoted = 1;
			}
		}
		$optionsarray = explode("||~|~||", $poll['options']);
		$votesarray = explode("||~|~||", $poll['votes']);
		$poll['question'] = htmlspecialchars_uni($poll['question']);
		$polloptions = '';

		for($i = 1; $i <= $poll['numoptions']; $i++)
		{
			$poll['totvotes'] = $poll['totvotes'] + $votesarray[$i-1];
		}

		// Loop through the poll options.
		for($i = 1; $i <= $poll['numoptions']; ++$i)
		{
			// Set up the parser options.
			$parser_options = array(
				"allow_html" => $forum['allowhtml'],
				"allow_mycode" => $forum['allowmycode'],
				"allow_smilies" => $forum['allowsmilies'],
				"allow_imgcode" => $forum['allowimgcode']
			);

			$option = $parser->parse_message($optionsarray[$i-1], $parser_options);
			$votes = $votesarray[$i-1];
			$number = $i;

			// Mark the option the user voted for.
			if($votedfor[$number])
			{
				$optionbg = "trow2";
				$votestar = "*";
			}
			else
			{
				$optionbg = "trow1";
				$votestar = "";
			}

			// If the user already voted or if the results need to be shown, do so; else show voting screen.
			if($alreadyvoted || $showresults)
			{
				if(intval($votes) == "0")
				{
					$percent = "0";
				}
				else
				{
					$percent = number_format($votes / $poll['totvotes'] * 100, 2);
				}
				$imagewidth = round(($percent/3) * 5);
				eval("\$polloptions .= \"".$templates->get("showthread_poll_resultbit")."\";");
			}
			else
			{
				if($poll['multiple'] == "yes")
				{
					eval("\$polloptions .= \"".$templates->get("showthread_poll_option_multiple")."\";");
				}
				else
				{
					eval("\$polloptions .= \"".$templates->get("showthread_poll_option")."\";");
				}
			}
		}

		// If there are any votes at all, all votes together will be 100%; if there are no votes, all votes together will be 0%.
		if($poll['totvotes'])
		{
			$totpercent = "100%";
		}
		else
		{
			$totpercent = "0%";
		}

		// Check if user is allowed to edit posts; if so, show "edit poll" link.
		if(is_moderator($fid, 'caneditposts') != 'yes')
		{
			$edit_poll = '';
		}
		else
		{
			$edit_poll = "| <a href=\"polls.php?action=editpoll&amp;pid={$poll['pid']}\">{$lang->edit_poll}</a>";
		}

		// Decide what poll status to show depending on the status of the poll and whether or not the user voted already.
		if($alreadyvoted || $showresults)
		{
			if($alreadyvoted)
			{
				$pollstatus = $lang->already_voted;
			}
			else
			{
				$pollstatus = $lang->poll_closed;
			}
			$lang->total_votes = sprintf($lang->total_votes, $poll['numvotes']);
			eval("\$pollbox = \"".$templates->get("showthread_poll_results")."\";");
			$plugins->run_hooks("showthread_poll_results");
		}
		else
		{
			$publicnote = '&nbsp;';
			if($poll['public'] == "yes")
			{
				$publicnote = $lang->public_note;
			}
			eval("\$pollbox = \"".$templates->get("showthread_poll")."\";");
			$plugins->run_hooks("showthread_poll");
		}

	}
	else
	{
		$pollbox = "";
	}

	// Create the forum jump dropdown box.
	$forumjump = build_forum_jump("", $fid, 1);

	// Mark this thread read for the currently logged in user.
	if($mybb->settings['threadreadcut'] && ($mybb->user['uid'] != 0))
	{
		// For registered users, store the information in the database.
		$db->shutdown_query("
			REPLACE INTO ".TABLE_PREFIX."threadsread
			SET tid='$tid', uid='".$mybb->user['uid']."', dateline='".time()."'
		");
	}
	else
	{
		// For guests, store the information in a cookie.
		my_set_array_cookie("threadread", $tid, time());
	}

	// If the forum is not open, show closed newreply button unless the user is a moderator of this forum.
	if($forum['open'] != "no")
	{
		eval("\$newthread = \"".$templates->get("showthread_newthread")."\";");

		// Show the appropriate reply button if this thread is open or closed
		if($thread['closed'] == "yes")
		{
			eval("\$newreply = \"".$templates->get("showthread_newreply_closed")."\";");
		}
		else
		{
			eval("\$newreply = \"".$templates->get("showthread_newreply")."\";");
		}
	}

	// Create the admin tools dropdown box.
	if($ismod == true)
	{
		if($pollbox)
		{
			$adminpolloptions = "<option value=\"deletepoll\">".$lang->delete_poll."</option>";
		}
		if($thread['visible'] != 1)
		{
			$approveunapprovethread = "<option value=\"approvethread\">".$lang->approve_thread."</option>";
		}
		else
		{
			$approveunapprovethread = "<option value=\"unapprovethread\">".$lang->unapprove_thread."</option>";
		}
		if($thread['closed'] == "yes")
		{
			$closelinkch = "checked";
		}
		if($thread['sticky'])
		{
			$stickch = "checked";
		}
		$closeoption = "<br /><label><input type=\"checkbox\" class=\"checkbox\" name=\"modoptions[closethread]\" value=\"yes\" $closelinkch />&nbsp;<strong>".$lang->close_thread."</strong></label>";
		$closeoption .= "<br /><label><input type=\"checkbox\" class=\"checkbox\" name=\"modoptions[stickthread]\" value=\"yes\" $stickch />&nbsp;<strong>".$lang->stick_thread."</strong></label>";
		$inlinecount = "0";
		$inlinecookie = "inlinemod_thread".$tid;
		$plugins->run_hooks("showthread_ismod");
	}
	else
	{
		$adminoptions = "&nbsp;";
		$inlinemod = "";
	}

	// Decide whether or not to include signatures.
	if($forumpermissions['canpostreplys'] != "no" && ($thread['closed'] != "yes" || is_moderator($fid) == "yes") && $mybb->settings['quickreply'] != "off" && $mybb->user['showquickreply'] != "no" && $forum['open'] != "no")
	{
		if($mybb->user['signature'])
		{
			$postoptionschecked['signature'] = "checked";
		}
		if($mybb->user['emailnotify'] == "yes")
		{
			$postoptionschecked['emailnotify'] = "checked";
		}
	    mt_srand ((double) microtime() * 1000000);
	    $posthash = md5($mybb->user['uid'].mt_rand());
		eval("\$quickreply = \"".$templates->get("showthread_quickreply")."\";");
	}
	else
	{
		$quickreply = "";
	}

	// Increment the thread view.
	$db->shutdown_query("UPDATE ".TABLE_PREFIX."threads SET views=views+1 WHERE tid='$tid'");
	++$thread['views'];

	// Work out the thread rating for this thread.
	if($forum['allowtratings'] != "no" && $thread['numratings'] > 0)
	{
		$thread['averagerating'] = round(($thread['totalratings']/$thread['numratings']), 2);
		$rateimg = intval(round($thread['averagerating']));
		$thread['rating'] = $rateimg."stars.gif";
		$thread['numratings'] = intval($thread['numratings']);
		$ratingav = sprintf($lang->rating_average, $thread['numratings'], $thread['averagerating']);
		eval("\$rating = \"".$templates->get("showthread_ratingdisplay")."\";");
	}
	else
	{
		$rating = "";
	}
	if($forum['allowtratings'] == "yes" && $forumpermissions['canratethreads'] == "yes")
	{
		eval("\$ratethread = \"".$templates->get("showthread_ratethread")."\";");
	}
	// Work out if we are showing unapproved posts as well (if the user is a moderator etc.)
	if($ismod)
	{
		$visible = "AND (p.visible='0' OR p.visible='1')";
	}
	else
	{
		$visible = "AND p.visible='1'";
	}

	// Threaded or lineair display?
	if($mybb->input['mode'] == "threaded")
	{
		$isfirst = 1;

		// Are we linked to a specific pid?
		if($mybb->input['pid'])
		{
			$where = "AND p.pid='".$mybb->input['pid']."'";
		}
		else
		{
			$where = " ORDER BY dateline ASC LIMIT 0, 1";
		}
		$query = $db->query("
			SELECT u.*, u.username AS userusername, p.*, f.*, eu.username AS editusername
			FROM ".TABLE_PREFIX."posts p
			LEFT JOIN ".TABLE_PREFIX."users u ON (u.uid=p.uid)
			LEFT JOIN ".TABLE_PREFIX."userfields f ON (f.ufid=u.uid)
			LEFT JOIN ".TABLE_PREFIX."users eu ON (eu.uid=p.edituid)
			WHERE p.tid='$tid' $visible $where
		");
		$showpost = $db->fetch_array($query);

		// Choose what pid to display.
		if(!$mybb->input['pid'])
		{
			$mybb->input['pid'] = $showpost['pid'];
		}

		// Is there actually a pid to display?
		if(!$showpost['pid'])
		{
			error($lang->error_invalidpost);
		}

		// Get the attachments for this post.
		$query = $db->simple_select(TABLE_PREFIX."attachments", "*", "pid=".$mybb->input['pid']);
		while($attachment = $db->fetch_array($query))
		{
			$attachcache[$attachment['pid']][$attachment['aid']] = $attachment;
		}

		// Build the threaded post display tree.
		$query = $db->query("
            SELECT u.username, u.username AS userusername, p.pid, p.replyto, p.subject, p.dateline
            FROM ".TABLE_PREFIX."posts p
            LEFT JOIN ".TABLE_PREFIX."users u ON (u.uid=p.uid)
            WHERE p.tid='$tid' 
            $visible
            ORDER BY p.dateline
        ");
        while($post = $db->fetch_array($query))
        {
            if(!$postsdone[$post['pid']])
            {
                if($post['pid'] == $mybb->input['pid'] || ($isfirst && !$mybb->input['pid']))
                {
                    $isfirst = 0;
                }
                $tree[$post['replyto']][$post['pid']] = $post;
                $postsdone[$post['pid']] = 1;
            }
        } 
		$threadedbits = buildtree();
		$posts = build_postbit($showpost);
		eval("\$threadexbox = \"".$templates->get("showthread_threadedbox")."\";");
		$plugins->run_hooks("showthread_threaded");
	}
	else // Linear display
	{
		// Figure out if we need to display multiple pages.
		$perpage = $mybb->settings['postsperpage'];
		if($mybb->input['page'] != "last")
		{
			$page = intval($mybb->input['page']);
		}
		if($mybb->input['pid'])
		{
			$query = $db->query("
				SELECT COUNT(p.pid) AS count FROM ".TABLE_PREFIX."posts p
				WHERE p.tid='$tid'
				AND p.pid <= '".$mybb->input['pid']."'
				$visible
			");
			$result = $db->fetch_field($query, "count");
			if(($result % $perpage) == 0)
			{
				$page = $result / $perpage;
			}
			else
			{
				$page = intval($result / $perpage) + 1;
			}
		}
		// Recount replies if user is a moderator to take into account unapproved posts.
		if($ismod)
		{
			$query = $db->simple_select(TABLE_PREFIX."posts p", "COUNT(*) AS replies", "p.tid='$tid' $visible");
			$thread['replies'] = $db->fetch_field($query, 'replies')-1;
		}
		$postcount = intval($thread['replies'])+1;
		$pages = $postcount / $perpage;
		$pages = ceil($pages);

		if($mybb->input['page'] == "last")
		{
			$page = $pages;
		}

		if($page > $pages)
		{
			$page = 1;
		}

		if($page)
		{
			$start = ($page-1) * $perpage;
		}
		else
		{
			$start = 0;
			$page = 1;
		}
		$upper = $start+$perpage;

		$multipage = multipage($postcount, $perpage, $page, "showthread.php?tid=$tid");
		if($postcount > $perpage)
		{
			eval("\$threadpages = \"".$templates->get("showthread_multipage")."\";");
		}

		// Lets get the pids of the posts on this page.
		$pids = "";
		$comma = '';
		$query = $db->simple_select(TABLE_PREFIX."posts p", "p.pid", "p.tid='$tid' $visible", array('order_by' => 'p.dateline', 'limit_start' => $start, 'limit' => $perpage));
		while($getid = $db->fetch_array($query))
		{
			$pids .= "$comma'$getid[pid]'";
			$comma = ",";
		}
		if($pids)
		{
			$pids = "pid IN($pids)";
			// Now lets fetch all of the attachments for these posts.
			$query = $db->simple_select(TABLE_PREFIX."attachments", "*", $pids);
			while($attachment = $db->fetch_array($query))
			{
				$attachcache[$attachment['pid']][$attachment['aid']] = $attachment;
			}
		}
		else
		{
			// If there are no pid's the thread is probably awaiting approval.
			error($lang->error_invalidthread);
		}

		// Get the actual posts from the database here.
		$pfirst = true;
		$posts = '';
		$query = $db->query("
			SELECT u.*, u.username AS userusername, p.*, f.*, eu.username AS editusername
			FROM ".TABLE_PREFIX."posts p
			LEFT JOIN ".TABLE_PREFIX."users u ON (u.uid=p.uid)
			LEFT JOIN ".TABLE_PREFIX."userfields f ON (f.ufid=u.uid)
			LEFT JOIN ".TABLE_PREFIX."users eu ON (eu.uid=p.edituid)
			WHERE $pids
			ORDER BY p.dateline
		");
		while($post = $db->fetch_array($query))
		{
			if($pfirst && $thread['visible'] == 0)
			{
				$post['visible'] = 0;
			}
			$posts .= build_postbit($post);
			$post = '';
			$pfirst = false;
		}
		$plugins->run_hooks("showthread_linear");
	}

	// Show the similar threads table if wanted.
	if($mybb->settings['showsimilarthreads'] != "no")
	{
		$query = $db->query("
			SELECT t.*, t.username AS threadusername, u.username, MATCH (t.subject) AGAINST ('".$db->escape_string($thread['subject'])."') AS relevance
			FROM ".TABLE_PREFIX."threads t
			LEFT JOIN ".TABLE_PREFIX."users u ON (u.uid = t.uid)
			WHERE t.fid='{$thread['fid']}' AND t.tid!='{$thread['tid']}' AND t.visible='1' AND t.closed NOT LIKE 'moved|%' AND MATCH (t.subject) AGAINST ('".$db->escape_string($thread['subject'])."') >= '{$mybb->settings['similarityrating']}'
			ORDER BY t.lastpost DESC
			LIMIT 0, {$mybb->settings['similarlimit']}
		");
		$count = 0;
		$similarthreadbits = '';
		$icon_cache = $cache->read("posticons");
		while($similar_thread = $db->fetch_array($query))
		{
			++$count;
			$trow = alt_trow();
			if($similar_thread['icon'] > 0 && $icon_cache[$similar_thread['icon']])
			{
				$icon = $icon_cache[$similar_thread['icon']];
				$icon = "<img src=\"{$icon['path']}\" alt=\"{$icon['name']}\" />";
			}
			else
			{
				$icon = "&nbsp;";
			}				
			if(!$similar_thread['username'])
			{
				$similar_thread['username'] = $similar_thread['threadusername'];
				$similar_thread['profilelink'] = $similar_thread['threadusername'];
			}
			else
			{
				$similar_thread['profilelink'] = build_profile_link($similar_thread['username'], $similar_thread['uid']);
			}
			$similar_thread['subject'] = $parser->parse_badwords($similar_thread['subject']);
			$similar_thread['subject'] = htmlspecialchars_uni($similar_thread['subject']);

			$lastpostdate = my_date($mybb->settings['dateformat'], $similar_thread['lastpost']);
			$lastposttime = my_date($mybb->settings['timeformat'], $similar_thread['lastpost']);
			$lastposter = $similar_thread['lastposter'];
			$lastposteruid = $similar_thread['lastposteruid'];

			// Don't link to guest's profiles (they have no profile).
			if($lastposteruid == 0)
			{
				$lastposterlink = $lastposter;
			}
			else
			{
				$lastposterlink = build_profile_link($lastposter, $lastposteruid);
			}
			$similar_thread['replies'] = my_number_format($similar_thread['replies']);
			$similar_thread['views'] = my_number_format($similar_thread['views']);
			eval("\$similarthreadbits .= \"".$templates->get("showthread_similarthreads_bit")."\";");
		}
		if($count)
		{
			eval("\$similarthreads = \"".$templates->get("showthread_similarthreads")."\";");
		}
	}

	// If the user is a moderator, show the moderation tools.
	if($ismod)
	{
		$customthreadtools = $customposttools = '';
		$query = $db->simple_select(TABLE_PREFIX."modtools", "tid, name, type", "CONCAT(',',forums,',') LIKE '%,$fid,%' OR CONCAT(',',forums,',') LIKE '%,-1,%'");
		while($tool = $db->fetch_array($query))
		{
			if($tool['type'] == 'p')
			{
				eval("\$customposttools .= \"".$templates->get("showthread_inlinemoderation_custom_tool")."\";");
			}
			else
			{
				eval("\$customthreadtools .= \"".$templates->get("showthread_moderationoptions_custom_tool")."\";");
			}
		}
		// Build inline moderation dropdown
		if(!empty($customposttools))
		{
			eval("\$customposttools = \"".$templates->get("showthread_inlinemoderation_custom")."\";");
		}
		eval("\$inlinemod = \"".$templates->get("showthread_inlinemoderation")."\";");

		// Build thread moderation dropdown
		if(!empty($customthreadtools))
		{
			eval("\$customthreadtools = \"".$templates->get("showthread_moderationoptions_custom")."\";");
		}
		eval("\$moderationoptions = \"".$templates->get("showthread_moderationoptions")."\";");
	}
	$lang->newthread_in = sprintf($lang->newthread_in, $forum['name']);
	eval("\$showthread = \"".$templates->get("showthread")."\";");
	$plugins->run_hooks("showthread_end");
	output_page($showthread);
}

/**
 * Build a navigation tree for threaded display.
 *
 * @param unknown_type $replyto
 * @param unknown_type $indent
 * @return unknown
 */
function buildtree($replyto="0", $indent="0")
{
	global $tree, $mybb, $theme, $mybb, $pid, $tid, $templates, $parser;
	if($indent)
	{
		$indentsize = 13 * $indent;
	}
	else
	{
		$indentsize = 0;
	}
	++$indent;
	if(is_array($tree[$replyto]))
	{
		foreach($tree[$replyto] as $key => $post)
		{
			$postdate = my_date($mybb->settings['dateformat'], $post['dateline']);
			$posttime = my_date($mybb->settings['timeformat'], $post['dateline']);
			$post['subject'] = htmlspecialchars_uni($parser->parse_badwords($post['subject']));
			if(!$post['subject'])
			{
				$post['subject'] = "[".$lang->no_subject."]";
			}
			if($post['userusername'])
			{
				$post['profilelink'] = build_profile_link($post['userusername'], $post['uid']);
			}
			else
			{
				$post['profilelink'] = $post['username'];
			}
			if($mybb->input['pid'] == $post['pid'])
			{
				eval("\$posts .= \"".$templates->get("showthread_threaded_bitactive")."\";");
			}
			else
			{
				eval("\$posts .= \"".$templates->get("showthread_threaded_bit")."\";");
			}
			if($tree[$post['pid']])
			{
				$posts .= buildtree($post['pid'], $indent);
			}
		}
		--$indent;
	}
	return $posts;
}

?>
		      &nbsp;</td>
	      </tr>
		  </table>
		</td>
		<td></td>
	</tr>
	
	
	<tr>
		<td height="1">
			<img src="DAC/DAC/images/spacer.gif" width="114" height="1" alt=""></td>
		<td>
			<img src="DAC/DAC/images/spacer.gif" width="123" height="1" alt=""></td>
		<td></td>
		<td></td>
		<td>
			<img src="DAC/DAC/images/spacer.gif" width="149" height="1" alt=""></td>
		<td></td>
		<td>
			<img src="DAC/DAC/images/spacer.gif" width="198" height="1" alt=""></td>
	    <td></td>
	</tr>
</table>
<!-- End ImageReady Slices -->
</body>
</html>
Ok you should put that plain HTML code in the templates

Admin CP --> Templates --> Modify/Delete --> Expand your template set --> Show Thread Templates --> showthread

You can place your HTML code accordingly there.
Revert to the default showthread.php file, you need to edit the templates.
Admin CP -> Templates -> Modify / Delete -> *your template*
You can find all templates there, header and footer is the one you're looking for.
kk ill try that