php正则过滤html标签、空格、换行符

 1$str=preg_replace("/s+/", " ", $str); //过滤多余回车
 2$str=preg_replace("/<[ ]+/si","<",$str); //过滤<__("<"号后面带空格)
 3$str=preg_replace("/<!--.*?-->/si","",$str); //注释
 4$str=preg_replace("/<(!.*?)>/si","",$str); //过滤DOCTYPE
 5$str=preg_replace("/<(/?html.*?)>/si","",$str); //过滤html标签
 6$str=preg_replace("/<(/?head.*?)>/si","",$str); //过滤head标签
 7$str=preg_replace("/<(/?meta.*?)>/si","",$str); //过滤meta标签
 8$str=preg_replace("/<(/?body.*?)>/si","",$str); //过滤body标签
 9$str=preg_replace("/<(/?link.*?)>/si","",$str); //过滤link标签
10$str=preg_replace("/<(/?form.*?)>/si","",$str); //过滤form标签
11$str=preg_replace("/cookie/si","COOKIE",$str); //过滤COOKIE标签
12$str=preg_replace("/<(applet.*?)>(.*?)<(/applet.*?)>/si","",$str); //过滤applet标签
13$str=preg_replace("/<(/?applet.*?)>/si","",$str); //过滤applet标签
14$str=preg_replace("/<(style.*?)>(.*?)<(/style.*?)>/si","",$str); //过滤style标签
15$str=preg_replace("/<(/?style.*?)>/si","",$str); //过滤style标签
16$str=preg_replace("/<(title.*?)>(.*?)<(/title.*?)>/si","",$str); //过滤title标签
17$str=preg_replace("/<(/?title.*?)>/si","",$str); //过滤title标签
18$str=preg_replace("/<(object.*?)>(.*?)<(/object.*?)>/si","",$str); //过滤object标签
19$str=preg_replace("/<(/?objec.*?)>/si","",$str); //过滤object标签
20$str=preg_replace("/<(noframes.*?)>(.*?)<(/noframes.*?)>/si","",$str); //过滤noframes标签
21$str=preg_replace("/<(/?noframes.*?)>/si","",$str); //过滤noframes标签
22$str=preg_replace("/<(i?frame.*?)>(.*?)<(/i?frame.*?)>/si","",$str); //过滤frame标签
23$str=preg_replace("/<(/?i?frame.*?)>/si","",$str); //过滤frame标签
24$str=preg_replace("/<(script.*?)>(.*?)<(/script.*?)>/si","",$str); //过滤script标签
25$str=preg_replace("/<(/?script.*?)>/si","",$str); //过滤script标签
26$str=preg_replace("/javascript/si","Javascript",$str); //过滤script标签
27$str=preg_replace("/vbscript/si","Vbscript",$str); //过滤script标签
28$str=preg_replace("/on([a-z]+)s*=/si","On\1=",$str); //过滤script标签
29$str=preg_replace("/&#/si","&＃",$str); //过滤script标签，如javAsCript:alert( )