public ModuleHandler::implementsHook($module, $hook)
Returns whether a given module implements a given hook.
string $module: The name of the module (without the .module extension).
string $hook: The name of the hook (e.g. "help" or "menu").
bool TRUE if the module is both installed and enabled, and the hook is implemented in that module.
Overrides ModuleHandlerInterface::implementsHook
public function implementsHook($module, $hook) { $function = $module . '_' . $hook; if (function_exists($function)) { return TRUE; } // If the hook implementation does not exist, check whether it lives in an // optional include file registered via hook_hook_info(). $hook_info = $this->getHookInfo(); if (isset($hook_info[$hook]['group'])) { $this->loadInclude($module, 'inc', $module . '.' . $hook_info[$hook]['group']); if (function_exists($function)) { return TRUE; } } return FALSE; }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Extension!ModuleHandler.php/function/ModuleHandler::implementsHook/8.1.x