Regarding validation of email address

Ruby
1

hi all

i used the following reg. expression

/^([^@\s]+)@((?:[-a-z0-9]+.)+[a-z]{2,})$/i
for validating an email address.

and its work nice. *but i need to add + in the validation as i need it

ex: [email protected]

so in order to validate this where should i put + symbol in regular
expression so that i send emails to [email protected].

thanks in advance.

2

2008/7/28 Vamsi K. [email protected]:

so in order to validate this where should i put + symbol in regular
expression so that i send emails to [email protected].

Have a look at http://tfletcher.com/lib/rfc822.rb

Regards,
Farrel

3

Vamsi K. wrote:

ex: [email protected]

so in order to validate this where should i put + symbol in regular
expression so that i send emails to [email protected].

E-mail address validation is a FAQ in the Regular Expression discipline.

You can’t do it. No Regexp can successfully distinguish valid from
invalid
e-mail addresses, in all their permutations.

If you want to provide a simple defense against typographical errors,
such as
omitting the @, you must write a Regexp that is too wide, and will
permit some
ill-formed addresses to slip past.

4

On Mon, Jul 28, 2008 at 9:19 AM, Phlip [email protected] wrote:

Phlip
Actually I believe it can be done, but it’s next to useless to do so.
There’s a nasty regex that claims to validate all RFC 2822 compliant
email addresses over at regular-expressions.info, and it was done so
just to show that it really is a bad idea. The regex Is really really
hideous, but the article on why not to do it is well done.
How to Find or Validate an Email Address

For those who don’t want to read the article, the last paragraph is
one that should be remembered when using regexes…

“Don’t blindly copy regular expressions from online libraries or
discussion forums. Always test them on your own data and with your own
applications.”

–Kyle