Pete Freitag Pete Freitag

Regex to Replace Multiple Blank Lines with One

Published on May 19, 2005
By Pete Freitag

I'm working on a function to strip HTML, but preserve things like paragraph spacing. In removing HTML tags, sometimes you end up with lots of blank lines... Here's a quick regular expression to convert multiple blank lines with just one \n character:

<cfset content = ReReplace(content, "[\r\n]+", "#Chr(10)#", "ALL")>

regex cfml rereplace html

Regex to Replace Multiple Blank Lines with One was first published on May 19, 2005.

If you like reading about regex, cfml, rereplace, or html then you might also like:

FuseGuard Web App Firewall for ColdFusion

The FuseGuard Web Application Firewall for ColdFusion & CFML is a high performance, customizable engine that blocks various attacks against your ColdFusion applications.

The weekly newsletter for the CFML Community


Will for that, try something like this as the pattern:

by Pete Freitag on 05/19/2005 at 1:54:56 PM UTC
That will only match one line with tabs at a time. so \n\t\n\t\n\t will be converted to \n\t\n, not just \n. You'll need [\r\n][\r\n\t]*[\r\n] or something like it.
by Barney on 05/19/2005 at 2:57:32 PM UTC
By the way, I have a handy tool that you can use to play with Regex:
by Pete Freitag on 05/19/2005 at 3:02:20 PM UTC
that's great! been looking for a function/cfc that does a good job of stripping out the HTML from form posts (before they get INSERT'd into the db)... preferably one with a list of optional "okay" HTML tags that can be passed in...

never been good with RegEx, though.
by forgetfoo on 05/20/2005 at 12:45:12 PM UTC
Domain for sale quality results found here
by on 06/29/2006 at 11:56:54 AM UTC