What are some recommended resources for understanding and improving email validation techniques in PHP?

Email validation is crucial in PHP to ensure that the email addresses provided by users are in the correct format. One recommended resource for understanding and improving email validation techniques in PHP is the PHP documentation, which provides detailed information on filter_var() function for validating email addresses. Additionally, websites like Stack Overflow and tutorials on websites like W3Schools can also provide helpful tips and examples for improving email validation in PHP.

$email = "example@example.com";

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