一般处理的方式有二种：1.通过编辑器的JS直接去除。2.提交到后台后，直接用程序去掉无效标签。下面我就分享一个通过PHP的处理方式，成功率可能不是100%。这程序也是在PHP官网上看到的，就顺便粘贴过来了。

复制代码 代码如下:

function ClearHtml($content,$allowtags='') {

mb_regex_encoding('UTF-8');

//replace MS special characters first

$search = array('/‘/u', '/’/u', '/“/u', '/”/u', '/—/u');

$replace = array(''', ''', '"', '"', '-');

$content = preg_replace($search, $replace, $content);

//make sure _all_ html entities are converted to the plain ascii equivalents - it appears

//in some MS headers, some html entities are encoded and some aren't

$content = html_entity_decode($content, ENT_QUOTES, 'UTF-8');

//try to strip out any C style comments first, since these, embedded in html comments, seem to

//prevent strip_tags from removing html comments (MS Word introduced combination)

if(mb_stripos($content, '/*') !== FALSE){

$content = mb_eregi_replace('#/*.*?*/#s', '', $content, 'm');

}

//introduce a space into any arithmetic expressions that could be caught by strip_tags so that they won't be

//'<1' becomes '< 1'(note: somewhat application specific)

$content = preg_replace(array('/<([0-9]+)/'), array('< $1'), $content);

$content = strip_tags($content, $allowtags);

//eliminate extraneous whitespace from start and end of line, or anywhere there are two or more spaces, convert it to one

$content = preg_replace(array('/^ss+/', '/ss+$/', '/ss+/u'), array('', '', ' '), $content);

//strip out inline css and simplify style tags

$search = array('#<(strong|b)[^>]*>(.*?)</(strong|b)>#isu', '#<(em|i)[^>]*>(.*?)</(em|i)>#isu', '#<u[^>]*>(.*?)</u>#isu');

$replace = array('<b>$2</b>', '<i>$2</i>', '<u>$1</u>');

$content = preg_replace($search, $replace, $content);

//on some of the ?newer MS Word exports, where you get conditionals of the form 'if gte mso 9', etc., it appears

//that whatever is in one of the html comments prevents strip_tags from eradicating the html comment that contains

//some MS Style Definitions - this last bit gets rid of any leftover comments */

$num_matches = preg_match_all("/<(.)*-->/isu', '', $content);

}

return $content;

}

测试使用结果：

复制代码 代码如下:

<?php

$content = ' <>

<p><spanyes"; font-size: 12.0000pt; font-family: "宋体";">《优伴户外旅行》——让旅行成为习惯！</span></p>越发忙碌的你，是否想给自己放个假？专注工作的你，是否还记得上一次锻炼是什么时候？优伴户外旅行，给你不一样的旅行体验：给心自由，便处处都是风景！</span></p>';

echo ClearHtml($content,'<p>');

/*

得到的结果：

<p >《优伴户外旅行》--让旅行成为习惯！</p>越发忙碌的你，是否想给自己放个假？专注工作的你，是否还记得上一次锻炼是什么时候？优伴户外旅行，给你不一样的旅行体验：给心自由，便处处都是风景！</p>

*/

?>