利⽤正则过滤各种标签，空格，换⾏符的代码收集php利⽤正则过滤各种标签，空格，换⾏符的代码：
01$str=preg_replace("/\s+/", " ", $str); //过滤多余回车
02$str=preg_replace("/<[ ]+/si","<",$str); //过滤<__("<"号后⾯带空格)
03$str=preg_replace("/<\!–.*?–>/si","",$str); //注释
04$str=preg_replace("/<(\!.*?)>/si","",$str); //过滤DOCTYPE
05$str=preg_replace("/<(\/?html.*?)>/si","",$str); //过滤html标签
06$str=preg_replace("/<(\/?head.*?)>/si","",$str); //过滤head标签
07$str=preg_replace("/<(\/?meta.*?)>/si","",$str); //过滤meta标签
08$str=preg_replace("/<(\/?body.*?)>/si","",$str); //过滤body标签
09$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","",$str); //过滤style标签
正则化过滤器16$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

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