How to change stock status option in woocommerce

Code Snippet to change stock status option in woocommerce.

Here I change out of stock option text to Sold and you can also add the option using the woocommerce_add_custom_stock_status function like below.

Create custom stock status options

function woocommerce_add_custom_stock_status() {
    ?>
    <script type="text/javascript">
    jQuery(function(){
        jQuery('._stock_status_field').not('.custom-stock-status').remove();
    });
    </script>
    <?php   
    
    $stock_status = get_post_meta($_REQUEST['post'], '_custom_stock_status', true );
    update_post_meta($_REQUEST['post'], '_stock_status', wc_clean( $stock_status ));


    woocommerce_wp_select( array( 'id' => '_stock_status', 'wrapper_class' => 'custom-stock-status', 'label' => __( 'Stock status', 'woocommerce' ), 'options' => array(        
        'instock' => __( 'In stock', 'woocommerce' ),
        'onbackorder' => __( 'Back Order', 'woocommerce' ),
        'outofstock' => __( 'Sold', 'woocommerce' ),
    ), 'desc_tip' => true, 'description' => __( 'Controls whether or not the product is listed as "in stock" or "out of stock" on the frontend.', 'woocommerce' ) ) );    
}
add_action('woocommerce_product_options_stock_status', 'woocommerce_add_custom_stock_status');

Save selected stock status option value in database

function woocommerce_save_custom_stock_status( $product_id ) {
    update_post_meta( $product_id, '_stock_status', wc_clean( $_POST['_stock_status'] ) );
    update_post_meta( $product_id, 'stock_status', wc_clean( $_POST['_stock_status'] ) );
    update_post_meta( $product_id, '_custom_stock_status', wc_clean( $_POST['_stock_status'] ) ); //save another custom meta since '_stock_status' will be overridden
}
add_action('woocommerce_process_product_meta', 'woocommerce_save_custom_stock_status',99,1);

Fetch the stock status option value and display at front view

function get_custom_stock_status( $data, $product ) {
   $product_id = $product->id;
   $stock_status = get_post_meta($product_id, '_custom_stock_status', true );
    
    switch( $stock_status ) {
        case 'instock':
            $data = array( 'availability' => __( 'In stock', 'woocommerce' ), 'class' => 'in-stock' );
        break;
        case 'onbackorder':
            $data = array( 'availability' => __( 'Back Order', 'woocommerce' ), 'class' => 'onbackorder' );
        break;
        case 'outofstock':
            $data = array( 'availability' => __( 'Sold', 'woocommerce' ), 'class' => 'outofstock' );
        break;
        case '':
            $data = array( 'availability' => __( 'In stock', 'woocommerce' ), 'class' => 'in-stock' );
        break;
    }
    return $data;
}
add_action('woocommerce_get_availability', 'get_custom_stock_status', 10, 2);

Change stock status once customer create order

function woocommerce_order_change_custom_stock_status( $order_id ){
    if( ! $order_id ) return;

    $order = wc_get_order( $order_id );
    $items = $order->get_items();
    foreach ( $items as $item ) {
        $product_id = $item->get_product_id();

        $real_stock_status = get_post_meta($product_id, '_stock_status', true );
        if($real_stock_status=="onbackorder") {
            $stock_status = get_post_meta($product_id, '_custom_stock_status', true ); //get status from custom meta
            update_post_meta($product_id, '_stock_status', wc_clean( $stock_status ));
        }
    }
}
add_action( 'woocommerce_thankyou', 'woocommerce_order_change_custom_stock_status', 10, 1 );

Check the blog for change the out of stock text to sold – https://codeamend.com/blog/how-to-change-out-of-stock-text-in-woocommerce/

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