How can PHP developers prevent abuse of email addresses in form submissions?

To prevent abuse of email addresses in form submissions, PHP developers can implement email validation on the server-side. This can be done by using PHP's built-in filter_var function with the FILTER_VALIDATE_EMAIL filter. By validating email addresses before processing form submissions, developers can ensure that only valid email addresses are accepted. 

$email = $_POST['email'];

if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
    // Invalid email address, handle error accordingly
} else {
    // Valid email address, proceed with form submission
}

Keywords

PHP form validation email validation spam prevention security

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