How to add variation stock status to Woocommerce product variation dropdown

Question

I would like to show the stock status (eg. In Stock / Out of Stock) for each product variation shown in the drop down list of variations on the Woocommerce Product Page. I h

Answer 1

Ok, first you'll need to get product variations like this:

$variations = $product->get_available_variations();

And inside options loop, you need to loop through the variations and find the current option stock status

foreach ($variations as $variation) {
    if($variation['attributes'][$name] == $option) {
        $stock = $variation['is_in_stock'];

    }
}

Outside the variations loop you need to add the wording for in-stock and out-of-stock variations

if( $stock == 1) {
    $stock_content = ' - In stock';
} else {
    $stock_content = ' - Out of stock';
}

Then change the html to include an additional variable ($stock_content)

$html .= '' . esc_html( $option  .  $stock_content ) . ''; 

So a complete function will look like this:

add_filter( 'woocommerce_dropdown_variation_attribute_options_html', 'show_stock_status_in_dropdown', 10, 2);
function show_stock_status_in_dropdown( $html, $args ) {
    $options = $args['options']; 
    $product = $args['product']; 
    $attribute = $args['attribute']; 
    $name = $args['name'] ? $args['name'] : 'attribute_' . sanitize_title( $attribute ); 
    $id = $args['id'] ? $args['id'] : sanitize_title( $attribute ); 
    $class = $args['class']; 
    $show_option_none = $args['show_option_none'] ? true : false; 
    $show_option_none_text = $args['show_option_none'] ? $args['show_option_none'] : __( 'Choose an option', 'woocommerce' ); 

  // Get all product variations
    $variations = $product->get_available_variations();

    if ( empty( $options ) && ! empty( $product ) && ! empty( $attribute ) ) { 
        $attributes = $product->get_variation_attributes(); 
        $options = $attributes[ $attribute ]; 
    } 

    $html = ''; 
    $html .= '' . esc_html( $show_option_none_text ) . ''; 

    if ( ! empty( $options ) ) { 
        if ( $product && taxonomy_exists( $attribute ) ) { 
          // Get terms if this is a taxonomy - ordered. We need the names too. 
          $terms = wc_get_product_terms( $product->get_id(), $attribute, array( 'fields' => 'all' ) ); 

          foreach ( $terms as $term ) { 
                if ( in_array( $term->slug, $options ) ) { 
                    $html .= 'slug, false ) . '>' . esc_html( apply_filters( 'woocommerce_variation_option_name', $term->name ) ) . ''; 
                } 
            }
        } else {
            foreach ( $options as $option ) {
                    foreach ($variations as $variation) {
                        if($variation['attributes'][$name] == $option) {
                            $stock = $variation['is_in_stock'];
                        }
                    }       
                if( $stock == 1) {
                    $stock_content = ' - (In Stock)';
                } else {
                    $stock_content = ' - (Out of Stock)';
                }
                 // This handles < 2.4.0 bw compatibility where text attributes were not sanitized. 
                $selected = sanitize_title( $args['selected'] ) === $args['selected'] ? selected( $args['selected'], sanitize_title( $option ), false ) : selected( $args['selected'], $option, false ); 

                $html .= '' . esc_html( $option  .  $stock_content ) . ''; 

            }
        } 
    } 

    $html .= ''; 

    return $html;
}