Is there a difference in how the mail() function behaves on a localhost setup compared to a live server environment?

When using the mail() function in PHP on a localhost setup, the emails may not actually be sent out since localhost environments do not have a mail server configured. To test the mail() function locally, you can use tools like Mailtrap or configure a local mail server. However, on a live server environment, the mail() function should work as expected if the server is properly configured with a mail server.

// Example code snippet to test mail() function on localhost using Mailtrap
$to = "recipient@example.com";
$subject = "Test Email";
$message = "This is a test email sent from localhost.";
$headers = "From: sender@example.com";

// Send mail
if (mail($to, $subject, $message, $headers)) {
    echo "Email sent successfully";
} else {
    echo "Email sending failed";
}