How to Programmatically Create WooCommerce Product Variations with New Attribute Values?

Create a WooCommerce Product Variation with New Attribute Values

When creating variable products in WooCommerce, you may want to add new attribute values to the product's variations. Here's a step-by-step guide on how to accomplish this programmatically:

1. Define the Product Variation Data:

Create an array containing the variation data, including attribute values, SKU, prices, and stock quantity. An example is provided below:

$variation_data = [
    'attributes' => [
        'size' => 'M',
        'color' => 'Blue'
    ],
    'sku' => 'my-product-variation',
    'regular_price' => 19.99,
    'stock_qty' => 10
];

2. Get the Variable Product Object:

Obtain the object of the variable product you want to add variations to:

$product = wc_get_product($product_id); // Replace $product_id with the actual product ID

3. Create the Variation Post:

Configure the post data for the new product variation:

$variation_post = [
    'post_title' => $product->get_title() . ' Variation', // Set the variation title
    'post_name' => 'product-' . $product_id . '-variation',
    'post_status' => 'publish',
    'post_parent' => $product_id,
    'post_type' => 'product_variation',
    'guid' => $product->get_permalink()
];

4. Insert the Variation Post:

Create the new product variation:

$variation_id = wp_insert_post($variation_post);

5. Set the Attribute Data:

Iterate through the variation attributes and set them in the product variation:

foreach ($variation_data['attributes'] as $attribute => $term_name) {
    $taxonomy = 'pa_' . $attribute;
    update_post_meta($variation_id, 'attribute_' . $taxonomy, $term_name);
}

6. Set Other Data:

Set the remaining variation data like SKU, prices, and stock quantity:

$variation = new WC_Product_Variation($variation_id); // Get the variation object

if (!empty($variation_data['sku'])) {
    $variation->set_sku($variation_data['sku']);
}

$variation->set_price($variation_data['regular_price']);

if (!empty($variation_data['stock_qty'])) {
    $variation->set_stock_quantity($variation_data['stock_qty']);
}

$variation->save(); // Save the variation

By following these steps, you can programmatically create product variations with new attribute values in WooCommerce.

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