Same name and namespace in other branches

1. 9 core/modules/help/src/Plugin/Block/HelpBlock.php \Drupal\help\Plugin\Block\HelpBlock::build()
2. 8.9.x core/modules/help/src/Plugin/Block/HelpBlock.php \Drupal\help\Plugin\Block\HelpBlock::build()
3. 11.x core/modules/help/src/Plugin/Block/HelpBlock.php \Drupal\help\Plugin\Block\HelpBlock::build()

Builds and returns the renderable array for this block plugin.

If a block should not be rendered because it has no content, then this method must also ensure to return no content: it must then only return an empty array, or an empty array with #cache set (with cacheability metadata indicating the circumstances for it being empty).

Return value

array A renderable array representing the content of the block.

Overrides BlockPluginInterface::build

File

core/modules/help/src/Plugin/Block/HelpBlock.php, line 87

Class

HelpBlock

Provides a 'Help' block.

Namespace

Drupal\help\Plugin\Block

Code

public function build() {
  // Do not show on a 403 or 404 page.
  if ($this->request->attributes
    ->has('exception')) {
    return [];
  }
  $build = [];
  $this->moduleHandler
    ->invokeAllWith('help', function (callable $hook, string $module) use (&$build) {
    // Don't add empty strings to $build array.
    if ($help = $hook($this->routeMatch
      ->getRouteName(), $this->routeMatch)) {
      // Convert strings to #markup render arrays so that they will XSS admin
      // filtered.
      $build[] = is_array($help) ? $help : [
        '#markup' => $help,
      ];
    }
  });
  return $build;
}

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