PHP清除html、css、js格式并去除空格的PHP函数

function cutstr_html($string,$length=0,$ellipsis='…'){<br />	$string=strip_tags($string);<br />	$string=preg_replace('/\n/is','',$string);<br />	$string=preg_replace('/ |　/is','',$string);<br />	$string=preg_replace('/ /is','',$string);<br />	preg_match_all("/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/",$string,$string);<br />	if(is_array($string)&&!empty($string[0])){<br />		if(is_numeric($length)&&$length){<br />			$string=join('',array_slice($string[0],0,$length)).$ellipsis;<br />		}else{<br />			$string=implode('',$string[0]);<br />		}<br />	}else{<br />		$string='';<br />	}<br />	return $string;<br />}