Alternately, we could copy Moodle (again) and use a really liberal
regex. Moodle 3.1 uses this one, which is nearly unchanged from 2001!
The most recent functional update to it was in 2006, when it was changed
to reject email addresses where the alias ends in a ".".
Basically, this regex checks for a list of acceptable characters for the
alias, a "@", and a list of acceptable characters for the domain that
includes at least one "."
/**
* Validates an email to make sure it makes sense.
*
* @param string $address The email address to validate.
* @return boolean
*/
function validate_email($address) {
return (preg_match('#^[-!\#$%&\'*+\\/0-9=?A-Z^_`a-z{|}~]+'.
'(\.[-!\#$%&\'*+\\/0-9=?A-Z^_`a-z{|}~]+)*'.
'@'.
'[-!\#$%&\'*+\\/0-9=?A-Z^_`a-z{|}~]+\.'.
'[-!\#$%&\'*+\\./0-9=?A-Z^_`a-z{|}~]+$#',
$address));
}
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https://bugs.launchpad.net/bugs/1615280
Title:
Email validation bug (long domains)
Status in Mahara:
In Progress
Status in Mahara 15.04 series:
In Progress
Status in Mahara 15.10 series:
In Progress
Status in Mahara 16.04 series:
In Progress
Status in Mahara 16.10 series:
In Progress
Bug description:
This one has existed since 2006, but only become an issue with the
opening up of TLDs over the past few years.
(https://en.wikipedia.org/wiki/List_of_Internet_top-level_domains)
Currently the email validation in pieform limits the TLD to between 2-4
characters (see pieform_rule_email() in
htdocs/lib/pieforms/pieform/rules/email.php.)
That means people from .horse, for example, can't register. Changing the
regex fixed my immediate problem, haven't tested how the other email validation
points react. They use FILTER_VALIDATE_EMAIL and PHPMailer::ValidateAddress, so
might be better.
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