What are the potential security risks or vulnerabilities to consider when implementing email functionality in PHP?

One potential security risk when implementing email functionality in PHP is the possibility of email injection attacks. To prevent this, always validate and sanitize user input before using it in email headers. Additionally, make sure to use a secure email library or function to send emails securely. 

// Validate and sanitize email input
$email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);

// Use a secure email library or function to send emails
$to = "recipient@example.com";
$subject = "Subject";
$message = "This is a secure email message.";
$headers = "From: sender@example.com" . "\r\n" .
           "Reply-To: sender@example.com" . "\r\n" .
           "X-Mailer: PHP/" . phpversion();

// Send the email
mail($to, $subject, $message, $headers);

Keywords

SQL injection cross-site scripting email injection secure sockets layer (SSL) PHPMailer.

Related Questions