Restrict delivery for certain product only

restrict-delivery-for-perticular-product.php

<?php

add_filter('pisol_dtt_setting_filter_pi_type', 'allowDeliveryWhenProduct');
function allowDeliveryWhenProduct($type){
	$delivery_only_for_this_product = 636;
	$type = 'Pickup';
	if(isset(WC()->cart)){

        foreach( WC()->cart->get_cart() as $cart_item ) {

            if($delivery_only_for_this_product == $cart_item['product_id']){
				
				      $type = "Both";
				
			      }
		    }
	}
	
	return $type;
}