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。
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[^>]*>（.*？）#isu"）;
$replace = array（"$2", "$2", "$1"）;
$content = preg_replace（$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：
复制代码代码如下:
<？php
$content = " <！--[if gte mso 9]><xml><w:WordDocument><w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel><w:DisplayHorizontalDrawingGridEvery>0</w:DisplayHorizontalDrawingGridEvery><w:DisplayVerticalDrawingGridEvery>2</w:DisplayVerticalDrawingGridEvery><w:DocumentKind>DocumentNotSpecified</w:DocumentKind><w:DrawingGridVerticalSpacing>7.8</w:DrawingGridVerticalSpacing><w:View>Normal</w:View><w:Compatibility></w:Compatibility><w:Zoom>0</w:Zoom></w:WordDocument></xml><！[endif]-->
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echo ClearHtml（$content,""）;

/*
得到的结果：
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*/
？>