Solved

Not Allowing Specific Character in Regular Expression

Posted on 2007-03-22
4
439 Views
Last Modified: 2012-08-13
Is it possible to specify that you don't want a specific character at a specific position in a regular expression?

In otherwords I want it to return true if the string is "blahblahblah" but not if it is blahblahblah[" and only that one character should be disallowed.
0
Comment
Question by:jfredrickson
  • 2
  • 2
4 Comments
 
LVL 58

Accepted Solution

by:
amit_g earned 500 total points
ID: 18775574
/blahblahblah[^[]/

[^abcd] matches anything but abcd.
0
 
LVL 4

Author Comment

by:jfredrickson
ID: 18775589
Is there no way to only specify that you don't want that specific character?
0
 
LVL 4

Author Comment

by:jfredrickson
ID: 18775599
Doh! Misread that. Looks perfect, thanks.
0
 
LVL 58

Expert Comment

by:amit_g
ID: 18775600
Thats exactly what it is. [^[] would match any character but [ i.e. the reg ex would not match if there is a [ in it (in turn disallowing it).
0

Featured Post

6 Surprising Benefits of Threat Intelligence

All sorts of threat intelligence is available on the web. Intelligence you can learn from, and use to anticipate and prepare for future attacks.

Join & Write a Comment

I have been reconstructing a PHP-based application that has grown into a full blown interface system over the last ten years by a developer that has now gone into business for himself building websites. I am not incredibly fond of writing PHP code o…
Do you hate spam? I do, and I am willing to bet you do as well. I often wonder, though, "if people hate spam so much, why do they still post their email addresses on the web?" I'm not talking about a plain-text posting here. I am referring to the fa…
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…

744 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now