WooCommerce Online Stock and Instore Stock

functions.php

// Step 1: Add a meta box for store stock field
function custom_store_stock_meta_box() {
    add_meta_box(
        'custom_store_stock_meta_box', // Meta box ID
        'Store Stock', // Title
        'render_custom_store_stock_meta_box', // Callback function to render the meta box content
        'product', // Post type (product for WooCommerce products)
        'side', // Context (side, normal, advanced)
        'default' // Priority (high, core, default, low)
    );
}
add_action('add_meta_boxes', 'custom_store_stock_meta_box');

// Step 2: Render meta box content
function render_custom_store_stock_meta_box($post) {
    // Retrieve the current value of the store stock if it exists
    $store_stock = get_post_meta($post->ID, '_store_stock', true);
    ?>
    <label for="store_stock_field">Store Stock:</label>
    <input type="text" id="store_stock_field" name="store_stock_field" value="<?php echo esc_attr($store_stock); ?>" />
    <?php
    wp_nonce_field('save_store_stock_meta', 'store_stock_meta_nonce');
}

// Step 3: Save meta box data
function save_custom_store_stock_meta_box($post_id) {
    // Check if nonce is set and valid
    if (!isset($_POST['store_stock_meta_nonce']) || !wp_verify_nonce($_POST['store_stock_meta_nonce'], 'save_store_stock_meta')) {
        return;
    }

    // Check if this is not an autosave
    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
        return;
    }

    // Check if the current user has permission to edit the post
    if (!current_user_can('edit_post', $post_id)) {
        return;
    }

    // Save store stock value
    if (isset($_POST['store_stock_field'])) {
        update_post_meta($post_id, '_store_stock', sanitize_text_field($_POST['store_stock_field']));
    } else {
        delete_post_meta($post_id, '_store_stock');
    }
}
add_action('save_post', 'save_custom_store_stock_meta_box');

// Step 1: Add the following code to your theme's functions.php file or a custom plugin

// Display inventory and custom store stock on single product page
function display_inventory_and_custom_store_stock() {
    global $product;

    // Get WooCommerce managed stock quantity
    $stock_quantity = $product->get_stock_quantity();

    // Get custom store stock quantity if set
    $store_stock = get_post_meta(get_the_ID(), '_store_stock', true);

    // Output both stock levels
    echo '<div class="stock-status">';

    // Display WooCommerce managed stock
    if ($product->managing_stock() && $stock_quantity !== null) {
        echo '<p class="woocommerce-stock-quantity">Online Stock: ' . $stock_quantity . '</p>';
    }

    // Display custom store stock if set
    if (!empty($store_stock)) {
        echo '<p class="custom-store-stock">Store Stock: ' . $store_stock . '</p>';
    }

    echo '</div>';
}
add_action('woocommerce_single_product_summary', 'display_inventory_and_custom_store_stock', 11);