Regex email vaildation in Zend - regex

Question

I'm using email validation of zend framework and when I give email address as abcde#gester.tech and it responded with invalid validation. Then I modifed the validation as below.
$emailValidator= new Validator\EmailAddress(Validator\Hostname::ALLOW_DNS | Validator\Hostname::ALLOW_LOCAL);
$emailRegex= new Validator\Regex(
array(
'pattern' => '/^(?:(?:[^<>()\[\]\\.,;:\s#"]+(?:\.[^<>()\[\]\\.,;:\s#"]+)*)|(?:".+"))#(?:(?:\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(?:(?:[a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/',
'messages'=>array(
'regexNotMatch'=>'Make sure your email pattern is correct'
)
)
);
$emailInp->getValidatorChain()->addValidator($emailValidator)->addValidator($emailRegex);
Now am able to pass the email address (abcde#gester.tech) with out validation error. But if I give the input as abcde#gester it also take as valid input. But I want to restrict that and I think this can be implemented by adding regex to this validation. May I know how to implement that.
$emailValidator= new Validator\EmailAddress(
Validator\Hostname::ALLOW_DNS |
Validator\Hostname::ALLOW_LOCAL);
$emailRegex= Validator\Regex(array('pattern' => '/^(?:(?:[^<>()\[\]\\.,;:\s#"]+(?:\.[^<>()\[\]\\.,;:\s#"]+)*)|(?:".+"))#(?:(?:\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(?:(?:[a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/'));
$emailInp->getValidatorChain()->addValidator($emailValidator->addValidator($emailRegex));

Answer 1

There is a Regex Validator support in Zend framework which facilitates matching the user-defined regex pattern. There is a pattern option which sets the regular expression pattern for the given validator.
You can use it to match the user-defined validator i.e. the pattern that suits your need.
SYNTAX:
$validator = new Zend\Validator\Regex(array('pattern' => '/your_desired_regex_pattern_here/'));
For matching the valid email address that suits your need you can fill in the pattern with available regex validators for email addresses. Also as per the Zend docs; the regex validator uses PCRE(php) syntax, so you can use PCRE regex flavor.
A sample example:
$validator = new Zend\Validator\Regex(array('pattern' => '/^(?:(?:[^<>()\[\]\\.,;:\s#"]+(?:\.[^<>()\[\]\\.,;:\s#"]+)*)|(?:".+"))#(?:(?:\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(?:(?:[a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/'));
$validator->isValid("abcde#gester.tech"); // returns true
$validator->isValid("abcde#gester"); // returns false
$validator->isValid("Someemail#someDomain.com"); // returns true
If you want to chain multiple validators on a single input data you can also use the below syntax:
$validatorChain = new Zend_Validate();
$validatorChain->addValidator(
new Zend\Validator\Regex(array('pattern' => '/^(?:(?:[^<>()\[\]\\.,;:\s#"]+(?:\.[^<>()\[\]\\.,;:\s#"]+)*)|(?:".+"))#(?:(?:\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(?:(?:[a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/'))
->addValidator(new Zend_Validate_Alnum()); // Second validator...You can chain multiple
if ($validatorChain->isValid($input_email)) {
// email passed validation
} else {
// email failed validation; print reasons
foreach ($validatorChain->getMessages() as $message) {
echo "$message\n";
}
}
You can find the demo of the above regex in here.
Reference: The regex for validating email address is taken from this answer.