php正則替換標簽的實現方法：首先通過“strip_tags”函數剝去字符串中的html標簽；然后利用正則表達式替換標簽，代碼語句如“pregreplace("/\\\\s /","",str=pregreplace("/\\\\s /","")”。
推薦：《php視頻教程》
1.strip_tags(剝去字符串中的 html 標簽)
strip_tags() 函數剝去字符串中的 html、xml 以及 php 的標簽。
2.字符串替換
str_replace(array(“ ”,” ”,”\\\\t”,”\\\\r\\\\n”,”\\\\r”,”\\\\n”),array(“”,”“,”“,”“,”“,”“)
3.利用正則表達式(效率稍微低一些)
str=pregreplace("/\\\\s /","",str); //過濾多余回車
str=pregreplace("/<[] /si","<",str); //過濾<__(“<”號后面帶空格)
str=pregreplace("/<.>/si","",str); //注釋
str=pregreplace("/<(.)>/si","",str); //過濾doctype
str=pregreplace("/<(\\\\/?html.)>/si","",str); //過濾html標簽
str=pregreplace("/<(\\\\/?head.)>/si","",str); //過濾head標簽
str=pregreplace("/<(\\\\/?meta.)>/si","",str); //過濾meta標簽
str=pregreplace("/<(\\\\/?body.)>/si","",str); //過濾body標簽
str=pregreplace("/<(\\\\/?link.)>/si","",str); //過濾link標簽
str=pregreplace("/<(\\\\/?form.)>/si","",str); //過濾form標簽
str=pregreplace("/cookie/si","cookie",str); //過濾cookie標簽
str=pregreplace("/<(applet.)>(.)<(\\\\/applet.)>/si","",str); //過濾applet標簽
str=pregreplace("/<(\\\\/?applet.)>/si","",str); //過濾applet標簽
str=pregreplace("/<(style.)>(.)<(\\\\/style.)>/si","",str); //過濾style標簽
str=pregreplace("/<(\\\\/?style.)>/si","",str); //過濾style標簽
str=pregreplace("/<(title.)>(.)<(\\\\/title.)>/si","",str); //過濾title標簽
str=pregreplace("/<(\\\\/?title.)>/si","",str); //過濾title標簽
str=pregreplace("/<(object.)>(.)<(\\\\/object.)>/si","",str); //過濾object標簽
str=pregreplace("/<(\\\\/?objec.)>/si","",str); //過濾object標簽
str=pregreplace("/<(noframes.)>(.)<(\\\\/noframes.)>/si","",str); //過濾noframes標簽
str=pregreplace("/<(\\\\/?noframes.)>/si","",str); //過濾noframes標簽
str=pregreplace("/<(i?frame.)>(.)<(\\\\/i?frame.)>/si","",str); //過濾frame標簽
str=pregreplace("/<(\\\\/?i?frame.)>/si","",str); //過濾frame標簽
str=pregreplace("/<(script.)>(.)<(\\\\/script.)>/si","",str); //過濾script標簽
str=pregreplace("/<(\\\\/?script.)>/si","",str); //過濾script標簽
str=pregreplace("/javascript/si","javascript",str); //過濾script標簽
str=pregreplace("/vbscript/si","vbscript",str); //過濾script標簽
str=pregreplace("/on([a?z] )\\\\s?=/si","on1=",str); //過濾script標簽
str=preg_replace("/&#/si","&＃",str); //過濾script標簽，如javascript:alert(
str=pregreplace("/<(\\\\/?.)>/si","",str);//匹配任意html標簽方式
this?>content=pregreplace("/<(\\\\/?.)>/si","",this->content);//過濾大多數的html標簽

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