Yii2 Validation

Yii2 Validate value without model

Ad Hoc Validation

Yii2 email Validate without model

Sometimes you need to do ad hoc validation for values that are not bound to any model.

If you only need to perform one type of validation (e.g. validating email addresses), you may call the validate() method of the desired validator, like the following:

$email = 'test@example.com';$validator = new yii\validators\EmailValidator();

if ($validator->validate($email, $error)) {
    echo 'Email is valid.';
} else {
    echo $error;
}

PHP Code for email validation

Validating email addresses with filter_var()

<?php

$email_a = 'joe@example.com';
$email_b = 'bogus';

if (filter_var($email_a, FILTER_VALIDATE_EMAIL)) {
    echo "This ($email_a) email address is considered valid.";
}
if (filter_var($email_b, FILTER_VALIDATE_EMAIL)) {
    echo "This ($email_b) email address is considered valid.";
}

?>

More details