e-mail validation in php?

[craigtaylor74]

I'm trying to validate my registration form but this script for the e-mail validity is returning an error. Can anyone tell me why? Or suggest another piece of code to check an e-mail address. In the meanwhile I've commented it out but I'd like to know a better solution.
Thanks.

/* // check an email address is possibly valid
else (!(preg_match("/^.{2,}?@.{2,}\./", $_POST['email'])))
{
include 'emailInvalid.htm';
} */

[mairving]

This is the one that I usually use:

PHP Code:

 function is_email_valid($email) { 
  if(eregi("^[a-z0-9\._-]+@+[a-z0-9\._-]+\.+[a-z]{2,3}$", $email)) return TRUE; 
  else return FALSE; 
} 


Looking at your code, you should have an if instead of an else.