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

    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