Module Create function Twig Block render

mod_block_twig_mod_block_twig.info.yml

name: Mod Block Twig
type: module
description: Create function twig render display block
package: Custom module - Required

dependencies:
 - block

core: 8.x
version: 1.0

mod_block_twig_mod_block_twig.module

<?php

use Drupal\block\Entity\Block;
use Drupal\block\BlockInterface;
use Drupal\file\Entity\File;
use Drupal\context\ContextInterface;

function _render_block($id){
    $block = \Drupal\block\Entity\Block::load($id);
    $block_content = \Drupal::entityManager()
        ->getViewBuilder('block')
        ->view($block);

    return array('#markup' => drupal_render($block_content));
}

mod_block_twig_mod_block_twig.services.yml

services:
  mod_block_twig.twig.render_block:
    class: Drupal\mod_block_twig\Twig\BlockExtension
    tags:
      - { name: twig.extension }

mod_block_twig_src_Twig_BlockExtension.php

<?php

/**
 * @file
 * Contains \Drupal\mod_block\Twig\BlockExtension.
 */

namespace Drupal\mod_block_twig\Twig;

use Drupal\block\BlockInterface;
use Drupal\Core\Entity\EntityInterface;

class BlockExtension extends \Twig_Extension{

    /**
     * Returns the name of the extension.
     *
     * @return string The extension name
     */
    public function getName()
    {
        return 'render_block';
    }

    /**
     * {@inheritdoc}
     */
    public function getFunctions()
    {
        return array(
            new \Twig_SimpleFunction('render_block', array($this, 'render_block'), array(
                'is_safe' => array('html'),
            )),
        );
    }

    public function render_block($id)
    {
        $block = \Drupal\block\Entity\Block::load($id);
      if(isset($block) && !$this->check_block_visibility($block)){
        unset($block);
        return ;
      }
      else if(isset($block) && $block->getTheme()) {
          $block_content = \Drupal::entityTypeManager()->getViewBuilder('block')->view($block);
          return \Drupal::service('renderer')->render($block_content);
      }
    }

    public function check_block_visibility($block)
    {
        $visibility = $block->getVisibility();
        if(isset($visibility) && isset($visibility['request_path'])) {
            $negate = $visibility['request_path']['negate'];
            $path =  str_replace('/','',strtolower(\Drupal::service('path.current')->getPath()));
            $pages =  $visibility['request_path']['pages'];
            $page_match = \Drupal::service('path.matcher')->matchPath($path,$pages);
            if($negate == false && $page_match){
                return true;
            }
            elseif($negate == true && $page_match){
                return false;
            }
        }
        else{
            return true;
        }
    }
}