function FirstOrLast::apply

Changes the order of a list of hook implementations.

Parameters

list<string> $identifiers: Hook implementation identifiers, as "$class::$method", to be changed by reference. The order operation must make sure that the array remains a list, and that the values are the same as before.

array<string, string> $module_finder: Lookup map to find a module name for each implementation. This may contain more entries than $identifiers.

Overrides OrderOperation::apply

File

core/lib/Drupal/Core/Hook/OrderOperation/FirstOrLast.php, line 32

Class

FirstOrLast

Moves one listener to the start or end of the list.

Namespace

Code

public function apply(array &$identifiers, array $module_finder) : void {
  $index = array_search($this->identifier, $identifiers);
  if ($index === FALSE) {
    // The element does not exist.
    return;
  }
  unset($identifiers[$index]);
  if ($this->isLast) {
    $identifiers[] = $this->identifier;
  }
  else {
    $identifiers = [
      $this->identifier,
      $identifiers,
    ];
  }
  $identifiers = array_values($identifiers);
}