Add Email Confirmation to Checkout

/**
 * Snippet Name:     Add Email Confirmation to Checkout
 * Snippet Author:   coding-bunny.com
 * Description:      Add an email verification field on the checkout page.
 */
 
 /* Add "Confirm Email" field on Checkout */
add_filter( 'woocommerce_checkout_fields', 'cb_verifica_email' );

function cb_verifica_email( $fields ) {
    // Modify the billing email field to adjust its class for styling
    $fields['billing']['billing_email']['class'] = array( 'form-row-first' );

    // Add a new field for "Confirm Email" to the billing section
    $fields['billing']['billing_em_ver'] = array(
       'label'   => 'Confirm Email Address', // Change label to English
       'required' => true, // Make this field required
       'class'    => array( 'form-row-last' ), // Adjust styling for the second field
       'clear'    => true, // Clear any previous float or alignment issues
       'priority' => 110, // Set the field position
    );
    
    return $fields; // Return the modified fields
}

/* Validate that both email addresses match on Checkout */
add_action( 'woocommerce_checkout_process', 'cb_email_match' );

function cb_email_match() {
    // Sanitize the emails to ensure they are valid and safe
    $email1 = isset( $_POST['billing_email'] ) ? sanitize_email( $_POST['billing_email'] ) : '';
    $email2 = isset( $_POST['billing_em_ver'] ) ? sanitize_email( $_POST['billing_em_ver'] ) : '';

    // Check if the emails do not match
    if ( $email2 !== $email1 ) {
        // Add an error notice if the emails don't match
        wc_add_notice( 'The email addresses do not match.', 'error' );
    }
}