VBScript code to replace text NOT in HTML tags

I had been looking for a solution to this problem for a little while and there was a post on ASPMessageboard that got me started. It pointed me to an article on 4GuysFromRolla that included a function as well as some search criteria.

First the function:

Function RegExpReplace(strInput, strPattern, strReplace) 
  ' Use <?> to indicate the match you wish to replace 
  ' Create and setup several variables: 
  Dim regEx, Match, Matches, Position, strReturn 
  Position = 1 
  strReturn = "" 

  ' Set up the regular expression: 
  Set regEx = New RegExp 
  regEx.Pattern = strPattern 
  regEx.IgnoreCase = True 
  regEx.Global = True 

  ' Get all the matches for it: 
  Set Matches = regEx.Execute(strInput) 

  ' Go through the Matches collection 
  ' and build the output string: 
  For Each Match in Matches 
    strReturn=strReturn & Mid(strInput, Position, Match.FirstIndex+1-Position)
    strReturn=strReturn & Replace(strReplace, "<?>", Match.Value) 
    Position = Len(Match.Value) + Match.FirstIndex + 1 
  Next 

  ' Add any text after the last match 
  strReturn = strReturn & Mid(strInput, Position, Len(strInput))
  RegExpReplace = strReturn 
End Function 

But the example search criteria in the post didn't quite work for me...

strHTML = RegExpReplace(strHTML, "strong(?![^<]+>), "*<?>*")

...it kept replacing text in html tags as well as text not in html tags. So, I banged around with it and came up with this modification:

strHTML = RegExpReplace(strHTML, "(?![^<]+>)" + strSearch + "(?![^<]+>)", strReplace)

strSearch is the text that I'm looking for and strReplace is what I want to replace it with.

I've done a few quick tests and it seems to be working well.

Published November 01, 2001 · Updated September 17, 2005
Categorized as ASP
Short URL: https://snook.ca/s/107

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2 Comments · RSS feed
Jon said on March 14, 2005

Excellent post! This has helped me immensely

Paul thomas said on December 02, 2006

Many thanks!!!!

Sorry, comments are closed for this post. If you have any further questions or comments, feel free to send them to me directly.

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