<%
Option Explicit
Function stripHTML(strHTML)
'Strips the HTML tags from strHTML
Dim objRegExp, strOutput
Set objRegExp = New Regexp
objRegExp.IgnoreCase = True
objRegExp.Global = True
objRegExp.Pattern = "<.+?>"
'Replace all HTML tag matches with the empty string
strOutput = objRegExp.Replace(strHTML, "")
'Replace all < and > with < and >
strOutput = Replace(strOutput, "<", "<")
strOutput = Replace(strOutput, ">", ">")
stripHTML = strOutput 'Return the value of strOutput
Set objRegExp = Nothing
End Function
%>
<form method="post" id=form1 name=form1>
<b>Enter an HTML String:</b><br>
<textarea name="txtHTML" cols="50" rows="8" wrap="virtual"><%=Request("txtHTML")%></textarea>
<p>
<input type="submit" value="Strip HTML Tags!" id=submit1 name=submit1>
</form>
<% if Len(Request("txtHTML")) > 0 then %>
<p><hr><p>
<b><u>View of string <i>with no</i> HTML stripping:</u></b><br>
<xmp>
<%=Request("txtHTML")%>
</xmp><p>
<b><u>View of string <i>with</i> HTML stripping:</u></b><br>
<pre>
<%=StripHTML(Request("txtHTML"))%>
</pre>
<% End If %>
下面介绍一下正则表达式的特殊字符:
“^”后接字符为字串开头:如"^b"匹配"bing"而不匹配"abc"
“$”前接字符为字串末尾:如"g$"匹配"bing"而不匹配"fgh"
“*”前接字符重复0~N次:如"go*gle"匹配"ggle"和"goooogle"
“+”前接字符重复1~N次:如"go+gle"匹配"gogle"和"gooogle"而不匹配"ggle"
“?”前接字符重复0或1次:如"go?gle"匹配"ggle"和"gogle"而不匹配"gooogle"
“.”表示除换行符外的所有字符:如".b"匹配"ab","cb",".+"匹配不换行的所有字符串
“|”表示“或”:如"ab|cd"同时匹配"ab"和"cd"而不匹配"abcd"
“( )”表示一或多个字符,从前往后,圆括号中的匹配字符串依次以$1,……$9,……返回:如"(bi(ng)z)hu(o)"中,$1代表"bi(ng)z",$2代表"ng",$3代表"o"
“[ ]”中可有多个字符,但只表示其中一个:如"[xyx]"匹配"x","y","z"但不匹配"xyz",等同于"x|y|z";另,"[abcde]"这种连续字符可简写为"[a-e]","[abcde12345]"可简写为"[a-e1-5]"
“[^ ]”表示除括号内字符以外的单个字符:如"[^xyz]"匹配"w","a"而不匹配"x","y";"[^abcde]"亦可简写为"[^a-e]"
“{n}”n为一数字,表示前接字符重复次数:如"a{3}"表示"aaa"
“{n,}”表示前接字符至少重复n次:如"a{3}"匹配"aaa"和"aaaaa"而不匹配"aa"
“{n,m}”表示前接字符至少重复n次,至多重复m次
“\”为转义字符,后接上述特殊字符时表示该字符:如"\?"表示"?","\["表示"["
“\w”匹配数字+字母+下划线集合;“\W”匹配除“\w”外的其他字符
“\d”匹配单个数字,“\D”匹配非数字
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