Regex needed

Hi,

Can anyone provide me a regex that just allows just alphanemeric and the "." character, but no other special character.

This for a DCT text field

Thanks,
Goks

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kaalraa

A simpler one would be: [a-z][A-Z][0-9][\.]

Hi,

Can anyone provide me a regex that just allows just alphanemeric and the "." character, but no other special character.

This for a DCT text field

Thanks,
Goks

Frederik

A simpler one would be: [a-z][A-Z][0-9][\.]

I think you mean [a-zA-Z0-9\.]

have a look also at this fine overview (well, I just picked it off google)
http://www.cs.tut.fi/~jkorpela/perl/regexp.html

... it tells you that \w will match any word character (alphanumerics + underscore), so if you don't like the underscore, you can't use it. Otherwise you could go with [\w\.]

ISCBorisB

I think you mean [a-zA-Z0-9\.]

have a look also at this fine overview (well, I just picked it off google)
http://www.cs.tut.fi/~jkorpela/perl/regexp.html

... it tells you that \w will match any word character (alphanumerics + underscore), so if you don't like the underscore, you can't use it. Otherwise you could go with [\w\.]

It is also wrong. I think you mean '^[a-zA-Z0-9\.]+$' or something of that nature. Better one is '^[\w\.]+$', note that it will allow '_'

Migrateduser

If s/he didn't really want the underscore, couldn't they otherwise just say:

^[\w^_]+$

?

Dave

ISCBorisB

If s/he didn't really want the underscore, couldn't they otherwise just say:

^[\w^_]+$

?Dave

Do not think so. [. . .] denotes a class of characters to match. [ˆ. . .] negates the class.
[\w^_] is simply a class that contains all of \w + '^' + '_'
If undescore is not allowed: '^[a-zA-Z0-9\.]+$'

goks

Thanks a ton, guys.

Will try to use the best of your inputs.

Regards,
Gokul