function ModuleHandler::hasImplementations

File

core/lib/Drupal/Core/Extension/ModuleHandler.php, line 368

Class

ModuleHandler

Class that manages modules in a Drupal installation.

Namespace

Code

public function hasImplementations(string $hook, $modules = NULL) : bool {
  if ($modules !== NULL) {
    foreach ((array) $modules as $module) {
      // Hook implementations usually found in a module's .install file are
      // not stored in the implementation info cache. In order to invoke hooks
      // like hook_schema() and hook_requirements() the module's .install file
      // must be included by the calling code. Additionally, this check avoids
      // unnecessary work when a hook implementation is present in a module's
      // .module file.
      if (function_exists($module . '_' . $hook)) {
        return TRUE;
      }
    }
  }
  $implementations = $this->getImplementationInfo($hook);
  if ($modules === NULL && !empty($implementations)) {
    return TRUE;
  }
  return !empty(array_intersect((array) $modules, array_keys($implementations)));
}