PHP去掉从word直接粘贴过来的没有用格式的函数

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。

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
$content = preg_replace(array('/^\s\s+/', '/\s\s+$/', '/\s\s+/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("/\<!--/u", $content, $matches);
if($num_matches){
$content = preg_replace('/\<!--(.)*--\>/isu', '', $content);
}
return $content;
}

测试使用结果：

<?php
$content = ' <!--[if gte mso 9]><xml><w:worddocument><w:browserlevel>microsoftinternetexplorer4</w:browserlevel><w:displayhorizontaldrawinggridevery>0</w:displayhorizontaldrawinggridevery><w:displayverticaldrawinggridevery>2</w:displayverticaldrawinggridevery><w:documentkind>documentnotspecified</w:documentkind><w:drawinggridverticalspacing>7.8</w:drawinggridverticalspacing><w:view>normal</w:view><w:compatibility></w:compatibility><w:zoom>0</w:zoom></w:worddocument></xml><![endif]-->
<p class="p0" style="text-indent: 24.0000pt; margin-bottom: 0pt; margin-top: 0pt;"><span style="mso-spacerun: "yes"; font-size: 12.0000pt; font-family: "宋体";">《优伴户外旅行》——让旅行成为习惯！</span></p>越发忙碌的你，是否想给自己放个假？专注工作的你，是否还记得上一次锻炼是什么时候？优伴户外旅行，给你不一样的旅行体验：给心*，便处处都是风景！</span></p>';
echo clearhtml($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*，便处处都是风景！</p>
*/
?>