DEDE中如何过滤掉Html标签，并且截取字符串长度

<wbr><wbr><wbr><span></span>在dede标签中只要使用2个函数就可以。</wbr></wbr></wbr>

[field:body function="cn_substr(Html2text(@me),80)"/]

<wbr><wbr><wbr><span></span><span style="color:#2f3699; line-height:21px; word-wrap:normal; word-break:normal">Html2text()</span>函数是去掉html标签代码。</wbr></wbr></wbr>

<wbr><wbr><wbr><span></span><span style="color:#2f3699; line-height:21px; word-wrap:normal; word-break:normal">cn_substr(str,80)</span>函数是截取字符串长度。</wbr></wbr></wbr>