PHP code example of manta_ray_media / random_hero_bg

1. Go to this page and download the library: Download manta_ray_media/random_hero_bg library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

manta_ray_media / random_hero_bg example snippets

public function clearCache()
{
  \Drupal::service('page_cache_kill_switch')->trigger();
  \Drupal::service('cache.render')->invalidateAll();
  
  // clear caches for anonymous 
  Cache::invalidateTags(['HIT']);
}


public function randomBackground(array $input, $number)
{
  $this->clearCache();
  $key = array_rand($input);
  return $input[$key];
}


var_dump($number, $key);


function pubmlst_preprocess_node__front(&$variables){
  $variables['#cache'] = [
    'max-age' => 0,
    'contexts' => ['session']
  ];
  $variables['hero_rand_bg']['#cache']['max-age'] = 0;
  $variables['hero_rand_test']['#cache']['max-age'] = 0;
}