Password Strength Regular Expression

[pramodx]

Hi

I just need a regular expression for the condition that the password
has to be a combination of alphabets and numbers. It cannot be only
numbers nor can it be only alphabets. No special characters allowed.

Can someone please help me out with a regex for this?

Any advice would be grateful

Thanks,

 

[Evertjan.]

pramodx wrote on 12 dec 2008 in comp.lang.javascript:

I just need a regular expression for the condition that the password
has to be a combination of alphabets and numbers. It cannot be only
numbers nor can it be only alphabets. No special characters allowed.

Can someone please help me out with a regex for this?

<script type='text/javascript'>

var pw='a2'

alert(/[a-z]/i.test(pw) && /\d/.test(pw) && !/[^a-z\d]/i.test(pw))

</script>

 

[Thomas 'PointedEars' Lahn]

I just need a regular expression for the condition that the password
has to be a combination of alphabets and numbers. It cannot be only
numbers nor can it be only alphabets. No special characters allowed.

Can someone please help me out with a regex for this?

<http://catb.org/~esr/faqs/smart-questions.html#examples>


PointedEars

 

[Lasse Reichstein Nielsen]

I just need a regular expression for the condition that the password
has to be a combination of alphabets and numbers. It cannot be only
numbers nor can it be only alphabets. No special characters allowed.

Can someone please help me out with a regex for this?

As Evertjan suggested, you should probably use more than one regexp to
check the different requirements, instead of encoding all the
requirements in one.

If that's not possible, a more complex (and therefore less readable
and less maintainable) single regexp could be
/^(?:\d+[a-z]|[a-z]+\d)[a-z\d]*$/i

(I notice you didn't have any requirements on the length of the
password. If you add those, the single regexp becomes significantly
more complex, but it's only one simple test to add outside the regexp)

/L

 

[pramodx]

Thanks Evert. It worked

pramodx wrote on 12 dec 2008 in comp.lang.javascript:

I just need a regular expression for the condition that thepassword
has to be a combination of alphabets and numbers. It cannot be only
numbers nor can it be only alphabets. No special characters allowed.

Can someone please help me out with a regex for this?

<script type='text/javascript'>

var pw='a2'

alert(/[a-z]/i.test(pw) && /\d/.test(pw) && !/[^a-z\d]/i.test(pw))

</script>