How to clear cache programmatically in Drupal 8?

Question

I am working on a Drupal 8 site. This site was working. I recently moved to another machine.

It is showing errors like:

Recoverable fatal error: Argument 1 passed to 

Drupal\Component\DependencyInjection\Container::__construct() must be of

 the type array, boolean given, called in [DRUPAL-

PATH]/core/lib/Drupal/Core/DrupalKernel.php on line 883 and defined in 

[DRUPAL-PATH]/core/lib/Drupal/Component/DependencyInjection/Container.php

 on line 119 #0 [DRUPAL-PATH]/core/includes/bootstrap.inc(550): 

_drupal_error_handler_real(4096, 'Argument 1 pass...', 

'/Applications/M...', 119, Array)

I need to clear cache programmatically.

Answer 1

If you want to clear specific cache like render cache then you can run the following code:

\Drupal::service('cache.render')->invalidateAll()

If you want to clear all the cache then try:

drupal_flush_all_caches()

The following services implement the CacheBackendInterface and has invalidateAll() method which marks all the cache items as invalid:

cache.bootstrap
cache.config
cache.data
cache.default
cache.discovery
cache.entity
cache.menu
cache.render
cache.static

Answer 2

Try below.

cache_clear_all() // For Drupal-7

drupal_flush_all_caches() // For Drupal-8

Answer 3

By SQL

TRUNCATE `cache_bootstrap`;
TRUNCATE `cache_config`;
TRUNCATE `cache_container`;
TRUNCATE `cache_data`;
TRUNCATE `cache_default`;
TRUNCATE `cache_discovery`;
TRUNCATE `cache_dynamic_page_cache`;
TRUNCATE `cache_entity`;
TRUNCATE `cache_menu`;
TRUNCATE `cache_render`;
TRUNCATE `cache_rest`;
TRUNCATE `cachetags`;
TRUNCATE `cache_toolbar`;

By Drush

drush cr all