PHP-preg_replace过滤字符串代码

$str=preg_replace("/\s+/", " ", $str); //过滤多余回车   
    $str=preg_replace("/<[ ]+/si","<",$str); //过滤<__("<"号后面带空格)   
    $str=preg_replace("/<\!--.*?-->/si","",$str); //注释   
    $str=preg_replace("/<(\!.*?)>/si","",$str); //过滤DOCTYPE   
    $str=preg_replace("/<(\/?html.*?)>/si","",$str); //过滤html标签   
    $str=preg_replace("/<(\/?head.*?)>/si","",$str); //过滤head标签   
    $str=preg_replace("/<(\/?meta.*?)>/si","",$str); //过滤meta标签   
    $str=preg_replace("/<(\/?body.*?)>/si","",$str); //过滤body标签   
    $str=preg_replace("/<(\/?link.*?)>/si","",$str); //过滤link标签   
    $str=preg_replace("/<(\/?form.*?)>/si","",$str); //过滤form标签   
    $str=preg_replace("/cookie/si","COOKIE",$str); //过滤COOKIE标签   
     
    $str=preg_replace("/<(applet.*?)>(.*?)<(\/applet.*?)>/si","",$str); //过滤applet标签   
    $str=preg_replace("/<(\/?applet.*?)>/si","",$str); //过滤applet标签   
     
    $str=preg_replace("/<(style.*?)>(.*?)<(\/style.*?)>/si","",$str); //过滤style标签   
    $str=preg_replace("/<(\/?style.*?)>/si","",$str); //过滤style标签   
     
    $str=preg_replace("/<(title.*?)>(.*?)<(\/title.*?)>/si","",$str); //过滤title标签   
    $str=preg_replace("/<(\/?title.*?)>/si","",$str); //过滤title标签   
     
    $str=preg_replace("/<(object.*?)>(.*?)<(\/object.*?)>/si","",$str); //过滤object标签   
    $str=preg_replace("/<(\/?objec.*?)>/si","",$str); //过滤object标签   
     
    $str=preg_replace("/<(noframes.*?)>(.*?)<(\/noframes.*?)>/si","",$str); //过滤noframes标签   
    $str=preg_replace("/<(\/?noframes.*?)>/si","",$str); //过滤noframes标签   
    $str=preg_replace("/<(i?frame.*?)>(.*?)<(\/i?frame.*?)>/si","",$str); //过滤frame标签   
    $str=preg_replace("/<(\/?i?frame.*?)>/si","",$str); //过滤frame标签   
    $str=preg_replace("/<(script.*?)>(.*?)<(\/script.*?)>/si","",$str); //过滤script标签   
    $str=preg_replace("/<(\/?script.*?)>/si","",$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，如javAsCript:alert('aabb)

目前就会这些，恳请大牛指教~

http://www.cnblogs.com/web-lover/archive/2012/01/21/2615953.html

  $str = preg_replace( "@<script(.*?)</script>@is", "", $rs['jsnd'] );
$str = preg_replace( "@<iframe(.*?)</iframe>@is", "", $rs['jsnd'] );
$str = preg_replace( "@<style(.*?)</style>@is", "", $rs['jsnd'] );
$str = preg_replace( "@<(.*?)>@is", "", $rs['jsnd'] );
$jsnd = str_replace( "&nbsp;", "", $str); 

$str1 = preg_replace( "@<script(.*?)</script>@is", "", $rs['rwms'] );
$str1 = preg_replace( "@<iframe(.*?)</iframe>@is", "", $rs['rwms'] );
$str1 = preg_replace( "@<style(.*?)</style>@is", "", $rs['rwms'] );
$str1 = preg_replace( "@<(.*?)>@is", "", $rs['rwms'] );
$rwms = str_replace( "&nbsp;", "", $str1);