ereg mapping

[johnsworld]

hey guys n gals.

i'm designing a site which requires a login using an email address. i'm trying to write a script which catches invalid emails when registering, but i can't get it to work properly. the main aim is that i want to accept all possible domains, of which i've noticed 6 - ie .us (.2), .co.uk (.2.2), .uk.com (.2.3), .com (.3), .org.com (.3.3) and .info (.4).

this is the maping i'm currently using:

'...@[0-9a-zA-Z]+([-]?[0-9a-zA-Z])*.([a-zA-Z]{2}(.[a-zA-Z]{2,3})?)|([a-zA-Z]{3}(.[a-zA-Z]{2})?)|([a-zA-Z]{4})$'

but it's not catching erroneous inputs such as:

[e-mail] (.3.3)
[e-mail] (.5)
[e-mail] (.2.4)
[e-mail] (.4.3)
[e-mail] (.4.2)

can anyone offer any help please?

[ednark]

you forgot .museum {6}

to check what is happening in your script try this code:

$pregex = '/[0-9a-zA-Z]+([-]?[0-9a-zA-Z])*\.([a-zA-Z]{2}(\.[a-zA-Z]{2,3})?)|([a-zA-Z]{3}(\.[a-zA-Z]{2})?)|([a-zA-Z]{4})$/';

$email = "[e-mail]";

preg_match( $pregex, $email, $matches );

print "<pre>";
print_r($matches);
print "</pre>";

if you want to check out from the horses mouth about email...

read rfc2822 it will tell you what valid email addresses format is

check out http://www.icann.org it will tell you what valid top level domains are registered worldwide (.uk, .us etc)

maybe that will help in general

[johnsworld]

thanks ednark, that's helped a lot. sorry about the late reply too!