Add Custom Field to Single Product Page WooCommerce

In WooCommerce, If you want to add custom field in single product page than here is solutions. In this example i was add recommended retail price(RRP). It’s price which manufacturer recommends retailer to sell the product. It will display in any Ads or magazine. Like “RRP : ₹500 ” and main price : ₹ 200

So here is code. Add below line of code in your theme’s functions.php file of your active child theme (or theme) and save the file.

// Add RRP field input at product edit page 

add_action( 'woocommerce_product_options_pricing', 'add_RRP_to_products' );        
 
function add_RRP_to_products() {           
woocommerce_wp_text_input( array( 
'id' => 'rrp', 
'class' => 'short wc_input_price', 
'label' => __( 'RRP', 'woocommerce' ) . ' (' . get_woocommerce_currency_symbol() . ')',
'data_type' => 'price', 
) 
);      
}
 
// Save RRP field via custom field
 
add_action( 'save_post', 'save_RRP' );
 
function save_RRP( $product_id ) {
    if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
        return;
    if ( isset( $_POST['rrp'] ) ) {
        if ( is_numeric( $_POST['rrp'] ) )
            update_post_meta( $product_id, 'rrp', $_POST['rrp'] );
    } else delete_post_meta( $product_id, 'rrp' );
}

// Display RRP field at single product page
 
add_action( 'woocommerce_single_product_summary', 'display_RRP', 9 );
 
function display_RRP() {
    global $product;
     
    if ( $product->get_type()  'variable' && $rrp = get_post_meta( $product->get_id(), 'rrp', true ) ) {
        echo '
';
        _e( 'RRP: ', 'woocommerce' );
        echo '' . wc_price( $rrp ) . '';
        echo '
';
    }
}