How can I programmatically load and display all available blocks?

Question

$block = Drupal\block\Entity\Block::load($block_id);
ksm($block);

This code loads only one specific block. But how can I load and display all available blocks?

Answer 1

Using the service plugin.manager.block we will get all blocks available definition.

$blockManager = \Drupal::service('plugin.manager.block');

$contextRepository = \Drupal::service('context.repository');

// Get blocks definition

$definitions = $blockManager->getDefinitionsForContexts($contextRepository->getAvailableContexts());

To get details about one specific block you can use below code.

print_r($definitions['help_block']);

Answer 2

Try this:

$blocks = Drupal\block\Entity\Block::loadMultiple();
ksm($blocks);

Answer 3

The core block module using "getFilteredDefinitions" method to list the blocks

$blockManager = \Drupal::service('plugin.manager.block');
$contextRepository = \Drupal::service('context.repository');

// Get blocks definition
$definitions = $blockManager->getFilteredDefinitions('block_ui', $contextRepository->getAvailableContexts());

print_r($definitions);

Answer 4

$query = \Drupal::entityQuery('block_content');
$ids  = $query->execute();

You can also use 'block' instead of 'block_content' to get blocks from code