小兽向大家介绍了WordPress无插件实现内容目录索引等相关知识,希望对您有所帮助
function article_index($content) {
$matches = array();
$ul_li = '';
$r = "/
<h3>([^<]+)<\/h3>/im";
if(preg_match_all($r, $content, $matches)) {
foreach($matches[1] as $num => $title) {
$content = str_replace($matches[0][$num], '
<h4 id="title-'.$num.'">'.$title.'</h4>
', $content);
$ul_li .= '
<li><a href="#title-'.$num.'" title="'.$title.'">'.$title."</a></li>
\n";
}
$content = "\n
<div id=\"article-index\">
<strong>文章目录</strong>
<ul id=\"index-ul\">\n" . $ul_li . "</ul>
</div>
\n" . $content;
}
return $content;
}
add_filter( "the_content", "article_index" );
优化界面,修改CSS
在我们内容编辑的时候,切换到HTML编辑器,然后在需要索引的标题用H3标注,具体的用H几要和上面的定义FUNCTION对应,默认的是H3。然后在显示的时候会自动抓取。为了达到美化的效果,需要用到CSS,具体的还是要根据需求调整。
#article-index { -moz-border-radius: 6px 6px 6px 6px; border: 1px solid #DEDFE1; float: right; margin: 0 0 15px 15px; padding: 0 6px; width: 200px; line-height: 23px; } #article-index strong { border-bottom: 1px dashed #DDDDDD; display: block; line-height: 30px; padding: 0 4px; } #index-ul { margin: 0; padding-bottom: 10px; } #index-ul li { background: none repeat scroll 0 0 transparent; list-style-type: disc; padding: 0; margin-left: 20px; }