Magento 2 : Face Error while create a custom block

Question

I got the below error when create the Custom Block for the HTML sitemap.

Error filtering template: Warning: Declaration of Vapor\Sitemap\Block\Sitemap\Category::_getHtml(Magento\Framework\Data\Tree\Node $menuTree, $childrenWrapClass, $limit, $colBrakes = Array) should be compatible with Magento\Theme\Block\Html\Topmenu::_getHtml(Magento\Framework\Data\Tree\Node $menuTree, $childrenWrapClass, $limit, array $colBrakes = Array) in C:\xampp\htdocs\Magento\app\code\Vapor\Sitemap\Block\Sitemap\Category.php on line 62

Block Code

<?php
namespace Vapor\Sitemap\Block\Sitemap;
// use Magento\Framework\View\Element\Template\Context;
use Magento\Framework\View\Element\Template;
// use Vapor\Sitemap\Model\Sitemap\CmsPages;
// use Vapor\Sitemap\Block\Sitemap\Cms;
// use Vapor\Sitemap\Block\Sitemap\Category;
class Index extends Template
{
 const SITEMAP_CUSTOM_TEMPLATE = 'Vapor_Sitemap::sitemap/sitemap.phtml';
 /**
 * [__construct]
 * @param \Magento\Framework\View\Element\Template\Context $context
 * @param \Magento\Framework\Stdlib\DateTime\Timezone $_stdTimezone [description]
 * @param array $data
 */
 protected $getSitemap;
 public function __construct(\Magento\Framework\View\Element\Template\Context $context,\Magento\Framework\Stdlib\DateTime\Timezone $_stdTimezone,
 array $data = [])
 {
 parent::__construct($context, $data);
 $this->getSitemap();
 }
 /**
 * 
 * @return html
 */
 protected function _toHtml()
 { 
 return parent::_toHtml();
 }
 /**
 * @return Mixed data
 */
 public function getSitemap()
 {
 //echo "ComeHere";exit;
 $this->setTemplate(self::SITEMAP_CUSTOM_TEMPLATE);
 return $this;
 }
}

Can anyone help to solve this.

Any help would be appreciated.

Thanks in advance..!

• aravind: share your block file code..such that it will be easy to debug
• AKM: @aravind Updated the Question.

Answer 1

make your _getHtml method from the class Vapor\Sitemap\Block\Sitemap\Category look like this:

protected function _getHtml(
 \Magento\Framework\Data\Tree\Node $menuTree,
 $childrenWrapClass,
 $limit,
 array $colBrakes = []
) {
.....
}

you are missing a type hint array on the last parameter