需求：
一、標題：打開template/default/common/header_common.htm文件，里面的代碼如下
!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
html xmlns="http://www.w3.org/1999/xhtml">
head>
meta http-equiv="Content-Type" content="text/html; charset={CHARSET}" />
!--{if $_G['config']['output']['iecompatible']}-->meta http-equiv="X-UA-Compatible" content="IE=EmulateIE{$_G['config']['output']['iecompatible']}" />!--{/if}-->
title>!--{if !empty($navtitle)}-->$navtitle - !--{/if}-->!--{if empty($nobbname)}--> $_G['setting']['bbname']!--{/if}-->Powered by Discuz!/title>
$_G['setting']['seohead']
meta name="keywords" content="{if !empty($metakeywords)}{echo dhtmlspecialchars($metakeywords)}{/if}" />
meta name="description" content="{if !empty($metadescription)}{echo dhtmlspecialchars($metadescription)} {/if}{if empty($nobbname)},$_G['setting']['bbname']{/if}" />
meta name="generator" content="Discuz! $_G['setting']['version']" />
meta name="author" content="Discuz! Team and Comsenz UI Team" />
meta name="copyright" content="2001-2017 Comsenz Inc." />
meta name="MSSmartTagsPreventParsing" content="True" />
meta http-equiv="MSThemeCompatible" content="Yes" />
base href="{$_G['siteurl']}" rel="external nofollow" />
!--{csstemplate}-->
script type="text/javascript">var STYLEID = '{STYLEID}', STATICURL = '{STATICURL}', IMGDIR = '{IMGDIR}', VERHASH = '{VERHASH}', charset = '{CHARSET}', discuz_uid = '$_G[uid]', cookiepre = '{$_G[config][cookie][cookiepre]}', cookiedomain = '{$_G[config][cookie][cookiedomain]}', cookiepath = '{$_G[config][cookie][cookiepath]}', showusercard = '{$_G[setting][showusercard]}', attackevasive = '{$_G[config][security][attackevasive]}', disallowfloat = '{$_G[setting][disallowfloat]}', creditnotice = '!--{if $_G['setting']['creditnotice']}-->$_G['setting']['creditnames']!--{/if}-->', defaultstyle = '$_G[style][defaultextstyle]', REPORTURL = '$_G[currenturl_encode]', SITEURL = '$_G[siteurl]', JSPATH = '$_G[setting][jspath]', CSSPATH = '$_G[setting][csspath]', DYNAMICURL = '$_G[dynamicurl]';/script>
script type="text/javascript" src="{$_G[setting][jspath]}common.js?{VERHASH}">/script>
!--{if empty($_GET['diy'])}-->!--{eval $_GET['diy'] = '';}-->!--{/if}-->
!--{if !isset($topic)}-->!--{eval $topic = array();}-->!--{/if}-->
1、原來的標題代碼為：
title>!--{if !empty($navtitle)}-->$navtitle - !--{/if}-->!--{if empty($nobbname)}--> $_G['setting']['bbname']!--{/if}-->Powered by Discuz!/title>
修改為：
title>!--{if !empty($navtitle)}-->$navtitle!--{/if}-->!--{if empty($nobbname)}--> $_G['setting']['bbname'] !--{/if}-->/title>
注意：一定記著把$navtitle后面的“ - ”去掉，要不然標題處還是會出現(xiàn) - ，例如下圖：
2、原來的描述代碼為：
meta name="description" content="{if !empty($metadescription)}{echo dhtmlspecialchars($metadescription)} {/if}{if empty($nobbname)},$_G['setting']['bbname']{/if}" />
修改為：
meta name="description" content="{if !empty($metadescription)}{echo dhtmlspecialchars($metadescription)} {/if}" />
二、底部：找到底部的模板文件template/default/common/footer.htm或者你模板文件對應的common/footer.htm，搜索“Powered by”，找到相關代碼行刪掉即可
div id="frt">
p>Powered by strong>a rel="external nofollow" target="_blank">Discuz!/a>/strong> em>$_G['setting']['version']/em>!--{if !empty($_G['setting']['boardlicensed'])}--> a rel="external nofollow" target="_blank">Licensed/a>!--{/if}-->/p>
p class="xs0">copy; 2001-2017 a rel="external nofollow" target="_blank">Comsenz Inc./a>/p>
/div>
三、修改完成后，登錄后臺更新一下緩存即可，最終效果如下圖，是不是非常完美。
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