Can replacing the mail() function with a specific mailer class require significant changes to the existing PHP code for a contact form?

Replacing the mail() function with a specific mailer class may require significant changes to the existing PHP code for a contact form. This is because the mailer class may have different method names, parameters, or configurations compared to the built-in mail() function. However, using a mailer class can offer more flexibility, features, and better error handling for sending emails.

// Example code snippet using a specific mailer class to send an email
require_once 'path/to/mailerClass.php';

// Instantiate the mailer class
$mailer = new Mailer();

// Set email parameters
$to = 'recipient@example.com';
$subject = 'Subject of the email';
$message = 'Message content of the email';

// Send the email using the mailer class
if($mailer->sendEmail($to, $subject, $message)) {
    echo 'Email sent successfully';
} else {
    echo 'Failed to send email';
}