<div class="codebody" id="code93041"> 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('#<(h3|b)[^>]>(.?)</(h3|b)>#isu','#<(em|i)[^>]>(.?)</(em|i)>#isu','#<u[^>]>(.?)#isu'); $replace = array('$2','$2','$1'); $content = preg_replace($search,$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 / $num_matches = preg_match_all("/\<!--/u",$matches); if($num_matches){ $content = preg_replace('/\<!--(.)-->/isu',$content); } return $content; }
