protected ModuleHandler::buildImplementationInfo($hook)
Builds hook implementation information for a given hook name.
string $hook: The name of the hook (e.g. "help" or "menu").
mixed[] An array whose keys are the names of the modules which are implementing this hook and whose values are either a string identifying a file in which the implementation is to be found, or FALSE, if the implementation is in the module file.
\RuntimeException Exception thrown when an invalid implementation is added by hook_module_implements_alter().
\Drupal\Core\Extension\ModuleHandler::getImplementationInfo()
protected function buildImplementationInfo($hook) { $implementations = array(); $hook_info = $this->getHookInfo(); foreach ($this->moduleList as $module => $extension) { $include_file = isset($hook_info[$hook]['group']) && $this->loadInclude($module, 'inc', $module . '.' . $hook_info[$hook]['group']); // Since $this->implementsHook() may needlessly try to load the include // file again, function_exists() is used directly here. if (function_exists($module . '_' . $hook)) { $implementations[$module] = $include_file ? $hook_info[$hook]['group'] : FALSE; } } // Allow modules to change the weight of specific implementations, but avoid // an infinite loop. if ($hook != 'module_implements_alter') { // Remember the original implementations, before they are modified with // hook_module_implements_alter(). $implementations_before = $implementations; // Verify implementations that were added or modified. $this->alter('module_implements', $implementations, $hook); // Verify new or modified implementations. foreach (array_diff_assoc($implementations, $implementations_before) as $module => $group) { // If drupal_alter('module_implements') changed or added a $group, the // respective file needs to be included. if ($group) { $this->loadInclude($module, 'inc', "$module.$group"); } // If a new implementation was added, verify that the function exists. if (!function_exists($module . '_' . $hook)) { throw new \RuntimeException("An invalid implementation {$module}_{$hook} was added by hook_module_implements_alter()"); } } } return $implementations; }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Extension!ModuleHandler.php/function/ModuleHandler::buildImplementationInfo/8.1.x