public function HelpBlock::build in Drupal 9
Same name and namespace in other branches
- 8 core/modules/help/src/Plugin/Block/HelpBlock.php \Drupal\help\Plugin\Block\HelpBlock::build()
- 10 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
See also
\Drupal\block\BlockViewBuilder
File
- core/
modules/ help/ src/ Plugin/ Block/ HelpBlock.php, line 88
Class
- HelpBlock
- Provides a 'Help' block.
Namespace
Drupal\help\Plugin\BlockCode
public function build() {
// Do not show on a 403 or 404 page.
if ($this->request->attributes
->has('exception')) {
return [];
}
$implementations = $this->moduleHandler
->getImplementations('help');
$build = [];
$args = [
$this->routeMatch
->getRouteName(),
$this->routeMatch,
];
foreach ($implementations as $module) {
// Don't add empty strings to $build array.
if ($help = $this->moduleHandler
->invoke($module, 'help', $args)) {
// Convert strings to #markup render arrays so that they will XSS admin
// filtered.
$build[] = is_array($help) ? $help : [
'#markup' => $help,
];
}
}
return $build;
}