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Regular Expression

hi, all

i need to write a Regular Expression,
the criteria is:--------->
Password matching expression. Password must be at least 8 characters, no more than 15 characters, and must include at least one upper case letter, one lower case letter, and one numeric digit.

---------------------------->

can, any one give the idea what will be the Expression.

thanx , in advance.

Neel
Dec 5 '08 #1
4 965
kenobewan
4,871 Expert 4TB
That sounds straightforward, so what is stopping you? Perhaps you need a reference article to get you started:

Regular Expressions Reference - Basic Syntax

So try it yourself and report back on your progress. Thanks.
Dec 5 '08 #2
hi ,kenobewan

i am using
^(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{4,15}$
above expression.

but it always takes first one as numeric digit.

other wise there was an error.

can u help me, what is the problem, with this, regular expression.
Dec 8 '08 #3
kenobewan
4,871 Expert 4TB
On the same site, I assume that you got this sample, there is a tester:

Regular Expression Library

Go wild!
Dec 8 '08 #4
balabaster
797 Expert 512MB
It took me two seconds on Google to run a search for "Regular Expression Password Complexity" and come up with this:

Google can be your best friend if you learn to use it (I would say properly, but it seems at least in this instance, you didn't even use it).

I'd also recommend the following sites to learn regular expressions:

And a great tool to help you learn Regular Expressions:
They're all great resources and will help you learn Regular Expressions inside out.
Dec 8 '08 #5

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