Why is it important to have users enter their password twice in a registration form, and how can this prevent errors in PHP scripts?

When users enter their password twice in a registration form, it helps to ensure that they have typed their password correctly and reduces the likelihood of errors. This can prevent issues such as mistyped passwords or forgotten passwords, ultimately improving the user experience and security of the application.

if ($_POST['password'] !== $_POST['confirm_password']) {
    // Passwords do not match, display an error message
    echo "Passwords do not match. Please try again.";
} else {
    // Passwords match, proceed with registration process
    // Additional code for registration process goes here
}