Out of Stock Variation

//Filter attributes and variations that are in stock

add_action( 'woocommerce_before_shop_loop_item_title', 'wk_out_of_stock_variations_loop' );
function wk_out_of_stock_variations_loop(){
    global $product;
    if ( $product->product_type == 'variable' ) { // if variation product is out of stock
        $available = $product->get_available_variations();
        if ( $available )foreach ( $available as $instockvar ) {
            if ( isset($instockvar['attributes']['attribute_pa_megethos'] ) ) {


        if(isset($_GET['filter_megethos'])){

           $destostock = $_GET['filter_megethos'];


          $array = explode(',', $destostock);



    if (in_array($instockvar['attributes']['attribute_pa_megethos'], $array )&& (!$instockvar['max_qty']>0)){
           global $product;
           $id = $product->get_id();

            echo "<style>.post-$id{display: none}</style>";

    }
          else{

          if (in_array($instockvar['attributes']['attribute_pa_megethos'], $array )&& ($instockvar['max_qty']>0)){
           global $product;
           $id = $product->get_id();

            echo "<style>.post-$id{display: block !important}</style>";

          }
          }

        }
    }

}
    }
}