[UPHPU] Email address format in regular expression

[Walt Haas]

The standard is RFC 2822 (http://www.ietf.org/rfc/rfc2922.txt)
The format of an address is defined on pages 15-18.

But I just punt to PEAR function Mail_RFC822::parseAddressList()
http://pear.php.net/manual/en/package.mail.mail-rfc822.parseaddresslist.php

-- Walt

Cabot Nelson <adjustable_pliers at yahoo.com> wrote:

> Using the ereg() function in PHP (http://us2.php.net/manual/en/function.ereg.
> php), I'm using this lengthy expression to determine a properly formatted ema
> il address:
>  
>  ^([a-zA-Z0-9_\-])+(\.([a-zA-Z0-9_\-])+)*@((\[(((([0-1])?([0-9])?[0-9])|(2[0-
> 4][0-9])|(2[0-5][0-5])))\.(((([0-1])?([0-9])?[0-9])|(2[0-4][0-9])|(2[0-5][0-5
> ])))\.(((([0-1])?([0-9])?[0-9])|(2[0-4][0-9])|(2[0-5][0-5])))\.(((([0-1])?([0
> -9])?[0-9])|(2[0-4][0-9])|(2[0-5][0-5]))\]))|((([a-zA-Z0-9])+(([\-])+([a-zA-Z
> 0-9])+)*\.)+([a-zA-Z])+(([\-])+([a-zA-Z0-9])+)*))$
>  
>  However, I know very little about regular expressions and don't know if this
>  is accurate. It seems to work. Is this the best expression for an email addr
> ess? Is there an *official* format as determined by the email protocol?
>  
>  Many thanks.
>  
>  -Cabot Nelson
> 
> 
> 
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-------
Walt Haas          The Web Site Doctor - Cures Sick Web Sites
(801) 534-1262     http://thewebsitedoctor.net