去掉html标签和空格等
<?php
$str = '<span style="color:#f00;">good; world</span>';
echo $str.'<br>';
$str = preg_replace("/&[a-z]+\;/i",'',$str);
echo strip_tags($str);
1 //替换字符 2 function replaceFilterHtml($str, $filterStr = '') { 3 $str=preg_replace("/\s+/", " ", $str); //过滤多余回车 4 $str=preg_replace("/<[ ]+/si","<",$str); //过滤<__("<"号后面带空格) 5 $str=preg_replace("/<\!–.*?–>/si","",$str); //注释 6 $str=preg_replace("/<(\!.*?)>/si","",$str); //过滤DOCTYPE 7 8 $replaceArr = array('html', 'div', 'b', 'br', 'p','h1','h2','h3','h4','h5','h6','head','meta','body','link','form','applet','style','title','object','noframes','javascript','vbscript','img','span','strong','ui','em','pre','li','ul','dd','dl','dt','ol'); 9 10 if($key = array_search($filterStr, $replaceArr)) { 11 unset($replaceArr[$key]); 12 } 13 14 $replaceStr = implode('|', $replaceArr); 15 16 $str=preg_replace("/<(\/?(".$replaceStr.").*?)>/si","",$str); //过滤html标签 17 $str=preg_replace("/cookie/si","COOKIE",$str); //过滤COOKIE标签 18 $str=preg_replace("/on([a-z]+)\s*=/si","On\\1=",$str); //过滤script标签 19 $str=preg_replace("/&#/si","&＃",$str); //过滤script标签，如javAsCript:alert 20 return $str; 21 }
