Enable Wholesale prices in Woocommerce 3 - php

Question

In wooCommerce, I have added a custom meta field with a custom price (wholesale price) in edit product pages settings. Everything works well.
When I set a wholesale price it works fine everywhere. But if I try to change this wholesale price it doesn't work. the old price remains everywhere.
What I am doing wrong? How can I solve this problem to allow wholesale price changes?
The code I am using:
function w4dev_get_wholesale_price( $product )
{
if(
$product->is_type( array('simple', 'variable') )
&& get_post_meta( $product->id, '_wholesale_price', true ) > 0
){
return get_post_meta( $product->id, '_wholesale_price', true );
}
elseif(
$product->is_type('variation')
&& get_post_meta( $product->variation_id, '_wholesale_price', true ) > 0
){
return get_post_meta( $product->variation_id, '_wholesale_price', true );
}
return 0;
}
add_action( 'woocommerce_product_options_pricing', 'w4dev_woocommerce_product_options_pricing' );
function w4dev_woocommerce_product_options_pricing()
{
woocommerce_wp_text_input( array(
'id' => '_wholesale_price',
'class' => 'wc_input_wholesale_price short',
'label' => __( 'Wholesale Price', 'woocommerce' ) . ' ('.get_woocommerce_currency_symbol().')',
'type' => 'text'
));
}
add_action( 'woocommerce_process_product_meta_simple', 'w4dev_woocommerce_process_product_meta_simple', 10, 1 );
function w4dev_woocommerce_process_product_meta_simple( $product_id )
{
if( isset($_POST['_wholesale_price']) && $_POST['_wholesale_price'] > 0 ){
update_post_meta( $product_id, '_wholesale_price', $_POST['_wholesale_price'] );
}
}
add_filter( 'woocommerce_get_price', 'w4dev_woocommerce_get_price', 10, 2);
function w4dev_woocommerce_get_price( $price, $product )
{
if( w4dev_get_wholesale_price($product) > 0 ) {
$price = w4dev_get_wholesale_price($product);
return $price;
}
}

Answer 1

There are some errors in your code and a lot of missing parts too:
The hook woocommerce_get_price is deprecated and outdated
To handle Product variations you need some more code (same thing for the variable products price range).
Other errors, like when saving your Wholesale price…
Your revisited code:
// Add "Wholesale Price" custom field to Products option pricing
add_action( 'woocommerce_product_options_pricing', 'w4dev_add_product_options_pricing' );
function w4dev_add_product_options_pricing()
{
woocommerce_wp_text_input( array(
'id' => '_wholesale_price',
'class' => 'wc_input_wholesale_price short',
'label' => __( 'Wholesale Price', 'woocommerce' ) . ' ('.get_woocommerce_currency_symbol().')',
'type' => 'text'
));
}
// Add custom field to VARIATIONS option pricing
add_action( 'woocommerce_variation_options_pricing', 'w4dev_add_variation_options_pricing', 20, 3 );
function w4dev_add_variation_options_pricing( $loop, $variation_data, $post_variation )
{
$value = get_post_meta( $post_variation->ID, '_wholesale_price', true );
$symbol = ' (' . get_woocommerce_currency_symbol() . ')';
$key = 'wholesale_price[' . $loop . ']';
echo '<div class="variable_wholesale-price"><p class="form-row form-row-first">
<label>' . __( "Wholesale Price", "woocommerce" ) . $symbol . '</label>
<input type="text" size="5" name="' . $key .'" value="' . esc_attr( $value ) . '" />
</p></div>';
}
// Save "Wholesale Price" custom field to Products
add_action( 'woocommerce_process_product_meta_simple', 'w4dev_save_product_wholesale_price', 20, 1 );
function w4dev_save_product_wholesale_price( $product_id ) {
if( isset($_POST['_wholesale_price']) )
update_post_meta( $product_id, '_wholesale_price', $_POST['_wholesale_price'] );
}
// Save "Wholesale Price" custom field to VARIATIONS
add_action( 'woocommerce_save_product_variation', 'w4dev_save_product_variation_wholesale_price', 20, 2 );
function w4dev_save_product_variation_wholesale_price( $variation_id, $i ){
if ( isset( $_POST['wholesale_price'][$i] ) ) {
update_post_meta( $variation_id, '_wholesale_price', floatval( $_POST['wholesale_price'][$i] ) );
}
}
// Simple, grouped and external products
add_filter('woocommerce_product_get_price', 'w4dev_custom_price', 90, 2 );
add_filter('woocommerce_product_get_regular_price', 'w4dev_custom_price', 90, 2 );
// Product variations (of a variable product)
add_filter('woocommerce_product_variation_get_regular_price', 'w4dev_custom_price', 99, 2 );
add_filter('woocommerce_product_variation_get_price', 'w4dev_custom_price', 90, 2 );;
function w4dev_custom_price( $price, $product ) {
if( get_post_meta( $product->get_id(), '_wholesale_price', true ) > 0 )
$price = get_post_meta( $product->get_id(), '_wholesale_price', true );
return $price;
}
// Variable product price ramge
add_filter('woocommerce_variation_prices_price', 'w4dev_custom_variation_price', 90, 3 );
add_filter('woocommerce_variation_prices_regular_price', 'w4dev_custom_variation_price', 90, 3 );
function w4dev_custom_variation_price( $price, $variation, $product ) {
if( get_post_meta( $variation->get_id(), '_wholesale_price', true ) > 0 )
$price = get_post_meta( $variation->get_id(), '_wholesale_price', true );
return $price;
}
Code goes in functions.php file of your active child theme (or active theme). Tested and works.
Now you will be able to change the value of your 'Wholesale Price' and to handle it in product variations.
Product variations Wholesale price setting:
To handle sale prices regarding Sale prices in Woocommerce, there is those related hooks:
woocommerce_product_get_sale_price
woocommerce_product_variation_get_sale_price
woocommerce_variation_prices_get_sale_price