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; }

<?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> */ ?>