Use the following steps to add product custom field for retail price.
Step 1: Add Custom field input at product add / edit page
<?php add_action( 'woocommerce_product_options_pricing', 'code_add_retail_to_products' );
function code_add_retail_to_products() {
woocommerce_wp_text_input( array(
'id' => 'retailprice',
'class' => 'short wc_input_price',
'label' => __( 'Retail price', 'woocommerce' ) . ' (' . get_woocommerce_currency_symbol() . ')',
'data_type' => 'price',
));
} ?> Step 2: Save Retail field via custom field
<?php add_action( 'save_post_product', 'code_save_retail' );
function code_save_retail( $product_id ) {
global $pagenow, $typenow;
if ( 'post.php' !== $pagenow || 'product' !== $typenow ) return;
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;
if ( isset( $_POST['retailprice'] ) ) {
if ( $_POST['retailprice'] )
update_post_meta( $product_id, 'retailprice', $_POST['retailprice'] );
} else delete_post_meta( $product_id, 'retailprice' );
} ?> Step 3: Display Retail field at single product page
<?php
add_action( 'woocommerce_single_product_summary', 'code_display_retail', 9 );
function code_display_retail() {
global $product;
if ( $retailprice = get_post_meta( $product->get_id(), 'retailprice', true ) ) {
echo '<div class="woocommerce_retail">';
_e( 'Retail price: ', 'woocommerce' );
echo '<span>' . wc_price( $retailprice ) . '</span>';
echo '</div>';
}
}
?>