html包括文本内容,截断包含HTML的文本忽略标签

html包括⽂本内容,截断包含HTML的⽂本，忽略标签我已经按照您的建议编写了⼀个将HTML截断的函数，但是没有打印出来，⽽是将其保存在字符串变量中。也处理HTML实体。/***functiontotruncateandthencleanupendoftheHTML,*truncatesbycountingcharactersoutsideofHTMLtags**@authoralexlockwood,alexdotlockwoodatwebsightdesign**@paramstring$strthestringtotruncate*@paramint$lenthenumberofcharacters*@paramstring$endtheendstringfortruncation*@returnstring$truncated_html****/publicstaticfunctiontruncateHTML($str,$len,$end='…'){//findalltags$tagPattern='/(]*)>?|&[\w#]+;/i';//matchhtmltagsandentitiespreg_match_all($tagPattern,$str,$matches,PREG_OFFSET_CAPTURE|PREG_SET_ORDER);//WSDDebug::dump($matches);exit;$i=0;//loopthrougheachfoundtagthatiswithinthe$len,addthosecharacterstothelen,//alsotrackopenandclosedtags//$matches[$i][0]=thewholetagstring--theonlyapplicablefieldforhtmlenitities//IFitsnotmatchingan&htmlentity;thefollowingapply//$matches[$i][1]=thestartofthetageither'//$matches[$i][2]=thetagname//$matches[$i][3]=theendofthetag//$matces[$i][$j][0]=thestring//$matces[$i][$j][1]=thestroffestwhile($matches[$i][0][1]<$len&&!empty($matches[$i])){$len=$len+strlen($matches[$i][0][0]);if(substr($matches[$i][0][0],0,1)=='&')$len=$len-1;//if$matches[$i][2]isundefinedthenitsanhtmlentity,wanttoignorethosefortagcounting//ignoreempty/singletontagsfortagcountingif(!empty($matches[$i][2][0])&&!in_array($matches[$i][2][0],array('br','img','hr','input','param','link'))){//doublecheckif(substr($matches[$i][3][0],-1)!='/'&&substr($matches[$i][1][0],-1)!='/')$openTags[]=$matches[$i][2][0];elseif(end($openTags)==$matches[$i][2][0]){array_pop($openTags);}else{$warnings[]="htmlhassometagsmismatchedinit:$str";}}$i++;}$closeTags='';if(!empty($openTags)){$openTags=array_reverse($openTags);foreach($openTagsas$t){$closeTagString.="".$t.">";}}if(strlen($str)>$len){//Findsthelastspacefromthestringnewlength$lastWord=strpos($str,'',$len);if($lastWord){//truncatewithnewlenlastword$str=substr($str,0,$lastWord);//findslastcharacter$last_character=(substr($str,-1,1));//addtheendtext$truncated_html=($last_character=='.'?$str:($last_character==','?substr($str,0,-1):$str)