[SOLVED] regex needed to validate emails

[tmyonline]

Hi guys:

 

I need a regex to validate emails of the forms "username@domain.tld" and "username@subdomain.domain.tld" ?  How can I achieve this ?  Thanks.

[Orio]

I personally use:

 

if (!eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$", $email))

 

 

Orio.

[tmyonline]

Orio,

 

Thanks a lot.  It helps.