How can PHP beginners avoid using outdated methods for validating email addresses in their scripts?

PHP beginners can avoid using outdated methods for validating email addresses by utilizing built-in functions like filter_var with the FILTER_VALIDATE_EMAIL flag. This function is more reliable and secure compared to older methods like regular expressions. By using filter_var, beginners can ensure that the email address validation is done correctly without the need for complex custom code.

$email = "example@example.com";

if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
    echo "Valid email address";
} else {
    echo "Invalid email address";
}