Customizing product prices make cart items price showing 0 - php

Question

I am trying to change the price of the product based on location.
For this i am using wc fields factory to create number of fields for locations and updating the price and based on IP i am finding the city(location) and i am fetching the custom field value.
Using
function return_custom_price($price, $product) {
global $post, $blog_id;
$price = get_post_meta($post->ID, '_regular_price');
$post_id = $post->ID;
$price = ($price[0]*2.5);
return $price;
}
add_filter('woocommerce_get_price', 'return_custom_price', 10, 2);
Its working fine, but when i go to view Cart there it showing product price as 0
like this:
Please help me out in this.
Thanks.

Answer 1

Update:
The product meta data '_regular_price' is not a custom field but the product regular price, that you can get directly using WC_Product methods and magic properties directly on the $product object.
If you look to your function you have 2 arguments: $price (the product price) and the $product (the product object)… So you don't need to use any global variables as you got already $product object, that you can use.
Here is the updated code:
add_filter('woocommerce_get_price', 'product_custom_price', 10, 2);
function product_custom_price($price, $product) {
$custom_price = $product->get_regular_price();
return $custom_price * 2.5;
}
Code goes in function.php file of your active child theme (or theme) or also in any plugin file.
Please see the cart screenshots:
1) The cart without using this code (before):
2) The cart using this the code (after):
As you can see, this code works perfectly and display the regular prices in cart items.
The OP is using this code with a custom field:
add_filter('woocommerce_get_price', 'product_custom_price', 10, 2);
function product_custom_price($price, $product) {
$custom_price = get_post_meta($product->id, 'custom_key', true);
return $custom_price;
}