$str=preg_replace("/\s+/", " ", $str); //過(guò)濾多余回車 

$str=preg_replace("/<[ ]+/si","<",$str); //過(guò)濾<__("<"號(hào)后面帶空格) 

$str=preg_replace("/<\!--.*?-->/si","",$str); //注釋 

$str=preg_replace("/<(\!.*?)>/si","",$str); //過(guò)濾DOCTYPE 

$str=preg_replace("/<(\/?html.*?)>/si","",$str); //過(guò)濾html標(biāo)簽 

$str=preg_replace("/<(\/?head.*?)>/si","",$str); //過(guò)濾head標(biāo)簽 

$str=preg_replace("/<(\/?meta.*?)>/si","",$str); //過(guò)濾meta標(biāo)簽 

$str=preg_replace("/<(\/?body.*?)>/si","",$str); //過(guò)濾body標(biāo)簽 

$str=preg_replace("/<(\/?link.*?)>/si","",$str); //過(guò)濾link標(biāo)簽 

$str=preg_replace("/<(\/?form.*?)>/si","",$str); //過(guò)濾form標(biāo)簽 

$str=preg_replace("/cookie/si","COOKIE",$str); //過(guò)濾COOKIE標(biāo)簽 

$str=preg_replace("/<(applet.*?)>(.*?)<(\/applet.*?)>/si","",$str); //過(guò)濾applet標(biāo)簽 

$str=preg_replace("/<(\/?applet.*?)>/si","",$str); //過(guò)濾applet標(biāo)簽 

$str=preg_replace("/<(style.*?)>(.*?)<(\/style.*?)>/si","",$str); //過(guò)濾style標(biāo)簽 

$str=preg_replace("/<(\/?style.*?)>/si","",$str); //過(guò)濾style標(biāo)簽 

$str=preg_replace("/<(title.*?)>(.*?)<(\/title.*?)>/si","",$str); //過(guò)濾title標(biāo)簽 

$str=preg_replace("/<(\/?title.*?)>/si","",$str); //過(guò)濾title標(biāo)簽 

$str=preg_replace("/<(object.*?)>(.*?)<(\/object.*?)>/si","",$str); //過(guò)濾object標(biāo)簽 

$str=preg_replace("/<(\/?objec.*?)>/si","",$str); //過(guò)濾object標(biāo)簽 

$str=preg_replace("/<(noframes.*?)>(.*?)<(\/noframes.*?)>/si","",$str); //過(guò)濾noframes標(biāo)簽 

$str=preg_replace("/<(\/?noframes.*?)>/si","",$str); //過(guò)濾noframes標(biāo)簽 

$str=preg_replace("/<(i?frame.*?)>(.*?)<(\/i?frame.*?)>/si","",$str); //過(guò)濾frame標(biāo)簽 

$str=preg_replace("/<(\/?i?frame.*?)>/si","",$str); //過(guò)濾frame標(biāo)簽 

$str=preg_replace("/<(script.*?)>(.*?)<(\/script.*?)>/si","",$str); //過(guò)濾script標(biāo)簽 

$str=preg_replace("/<(\/?script.*?)>/si","",$str); //過(guò)濾script標(biāo)簽 

$str=preg_replace("/javascript/si","Javascript",$str); //過(guò)濾script標(biāo)簽 

$str=preg_replace("/vbscript/si","Vbscript",$str); //過(guò)濾script標(biāo)簽 

$str=preg_replace("/on([a-z]+)\s*=/si","On\\1=",$str); //過(guò)濾script標(biāo)簽 

$str=preg_replace("/&#/si","&＃",$str); //過(guò)濾script標(biāo)簽，如javAsCript:alert( 

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