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

$str=preg_replace("/

$str=preg_replace("//si","",$str); //注釋

$str=preg_replace("//si","",$str); //過濾DOCTYPE

$str=preg_replace("//si","",$str); //過濾html標簽

$str=preg_replace("//si","",$str); //過濾head標簽

$str=preg_replace("//si","",$str); //過濾meta標簽

$str=preg_replace("//si","",$str); //過濾body標簽

$str=preg_replace("//si","",$str); //過濾link標簽

$str=preg_replace("//si","",$str); //過濾form標簽

$str=preg_replace("/cookie/si","COOKIE",$str); //過濾COOKIE標簽

$str=preg_replace("/(.*?)/si","",$str); //過濾applet標簽

$str=preg_replace("//si","",$str); //過濾applet標簽

$str=preg_replace("/(.*?)/si","",$str); //過濾style標簽

$str=preg_replace("//si","",$str); //過濾style標簽

$str=preg_replace("/(.*?)/si","",$str); //過濾title標簽

$str=preg_replace("//si","",$str); //過濾title標簽

$str=preg_replace("/(.*?)/si","",$str); //過濾object標簽

$str=preg_replace("//si","",$str); //過濾object標簽

$str=preg_replace("/(.*?)/si","",$str); //過濾noframes標簽

$str=preg_replace("//si","",$str); //過濾noframes標簽

$str=preg_replace("/(.*?)/si","",$str); //過濾frame標簽

$str=preg_replace("//si","",$str); //過濾frame標簽

$str=preg_replace("/(.*?)/si","",$str); //過濾script標簽

$str=preg_replace("//si","",$str); //過濾script標簽

$str=preg_replace("/javascript/si","Javascript",$str); //過濾script標簽

$str=preg_replace("/vbscript/si","Vbscript",$str); //過濾script標簽

$str=preg_replace("/on([a-z]+)\s*=/si","On\\1=",$str); //過濾script標簽

$str=preg_replace("//si","&＃",$str); //過濾script標簽，如javAsCript:alert(

總結

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