typecho的面包屑导航代码

很早以前网上摘抄的面包屑代码，此去经年，从当年的一头雾水，到今天略懂略懂，时光荏苒，总算是凑齐了摘要的显示字数。

<?php if($this->is('index')):?>
<?php elseif ($this->is('post')): ?>
<div id="bread" class="content-single-head">
<i class="icon-location" aria-hidden="true"></i>
<a class="bread-head" href="<?php $this->options->siteUrl(); ?>">首页</a><span>&gt;</span><?php $this->category(); ?><span>&gt;</span><?php $this->title(); ?>
</div>
<?php else: ?>
<div id="bread" class="content-single-head">
<i class="icon-location" aria-hidden="true"></i>
<a class="headbread" href="<?php $this->options->siteUrl(); ?>">首页</a><span>&gt;</span><?php $this->archiveTitle(' &raquo; ','',''); ?>
</div>
<?php endif; ?>