How do new developments in domain names and special characters impact the validation of email addresses in PHP?

New developments in domain names, such as the introduction of special characters, can impact the validation of email addresses in PHP. To ensure that email addresses with these new domain names are properly validated, you can use the FILTER_VALIDATE_EMAIL filter in PHP. This filter checks if the email address has a valid format, including the new domain name conventions.

$email = "example@example.新闻"; // Email address with special character domain name

if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
    echo "Email address is valid.";
} else {
    echo "Email address is invalid.";
}