PHP实现过滤各种HTML标签_PHP

首先分享一些比较常见的

$str=preg_replace("/<s>]*?srcs*=s*('|")(.*?)\1[^>]*?/?s*>/i","", $str); //过滤img标签$str=preg_replace("/s+/","", $str); //过滤多余回车$str=preg_replace("/<[ ]+/si","<",$str); //过滤<__("<"号后面带空格)$str=preg_replace("/<!---ecms .*?-->/si","",$str); //注释$str=preg_replace("//si","",$str); //过滤DOCTYPE$str=preg_replace("//si","",$str); //过滤html标签$str=preg_replace("//si","",$str); //过滤head标签$str=preg_replace("//si","",$str); //过滤meta标签$str=preg_replace("//si","",$str); //过滤body标签$str=preg_replace("//si","",$str); //过滤link标签$str=preg_replace("//si","",$str); //过滤form标签$str=preg_replace("/cookie/si","COOKIE",$str); //过滤COOKIE标签$str=preg_replace("/(.*?)/si","",$str); //过滤applet标签$str=preg_replace("//si","",$str); //过滤applet标签$str=preg_replace("/(.*?)/si","",$str); //过滤style标签$str=preg_replace("//si","",$str); //过滤style标签$str=preg_replace("/(.*?)/si","",$str); //过滤title标签$str=preg_replace("//si","",$str); //过滤title标签$str=preg_replace("/(.*?)/si","",$str); //过滤object标签$str=preg_replace("//si","",$str); //过滤object标签$str=preg_replace("/(.*?)/si","",$str); //过滤noframes标签$str=preg_replace("//si","",$str); //过滤noframes标签$str=preg_replace("/(.*?)/si","",$str); //过滤frame标签$str=preg_replace("//si<strong style="color:transparent">本文来源gao@daima#com搞(%代@#码@网&</strong><strong>搞gaodaima代码</strong>","",$str); //过滤frame标签$str=preg_replace("/(.*?)/si","",$str); //过滤script标签$str=preg_replace("//si","",$str); //过滤script标签$str=preg_replace("/javascript/si","Javascript",$str); //过滤script标签$str=preg_replace("/vbscript/si","Vbscript",$str); //过滤script标签$str=preg_replace("/on([a-z]+)s*=/si","On\1=",$str); //过滤script标签$str=preg_replace("/&#/si","&＃",$str); //过滤script标签

更简单些的写法：

function delhtml($str){  //清除html标签$st=-1; //开始$et=-1; //结束$stmp=array();$stmp[]=" ";$len=strlen($str);for($i=0;$i<$len;$i++){  $ss=substr($str,$i,1);  if(ord($ss)==60){ //ord("")==62  $et=$i;  if($st!=-1){   $stmp[]=substr($str,$st,$et-$st+1);  }  }}$str=str_replace($stmp,"",$str);return $str;}

再来一个：

function clear_html_label($html) { $search = array ("'<script[^>]*?>.*?</script>'si", "'<[/!]*?[^]*?>'si", "'([rn])[s]+'", "'&(quot|#34);'i", "'&(amp|#38);'i", "'&(lt|#60);'i", "'&(gt|#62);'i", "'&(nbsp|#160);'i", "'&(iexcl|#161);'i", "'&(cent|#162);'i", "'&(pound|#163);'i", "'&(copy|#169);'i", "'&#(d+);'e"); $replace = array ("", "", "1", """, "&", "", " ", chr(161), chr(162), chr(163), chr(169), "chr(1)");return preg_replace($search, $replace, $html); }

以上三种方法均可以实现，不过各有优劣，小伙伴们根据自己的项目需求来选择吧。

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