What are some potential pitfalls when trying to verify email addresses using PHP?

One potential pitfall when verifying email addresses using PHP is not properly validating the email format. To solve this issue, you can use PHP's built-in filter_var function with the FILTER_VALIDATE_EMAIL filter to ensure the email address is in a valid format.

$email = "example@example.com";

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