function module_hook in Drupal 7

Same name and namespace in other branches

1. 4 includes/module.inc \module_hook()
2. 5 includes/module.inc \module_hook()
3. 6 includes/module.inc \module_hook()

Determines whether a module implements a hook.

Parameters

$module: The name of the module (without the .module extension).

$hook: The name of the hook (e.g. "help" or "menu").

Return value

TRUE if the module is both installed and enabled, and the hook is implemented in that module.

Related topics

9 calls to module_hook()

drupal_check_module in includes/install.inc

Checks a module's requirements.

field_help in modules/field/field.module

Implements hook_help().

field_system_info_alter in modules/field/field.module

Implements hook_system_info_alter().

help_page in modules/help/help.admin.inc

Menu callback; prints a page listing general help for a module.

module_disable in includes/module.inc

Disables a given set of modules.

... See full list

File

includes/module.inc, line 687

API for loading and interacting with Drupal modules.

Code

function module_hook($module, $hook) {
  $function = $module . '_' . $hook;
  if (function_exists($function)) {
    return TRUE;
  }

  // If the hook implementation does not exist, check whether it may live in an
  // optional include file registered via hook_hook_info().
  $hook_info = module_hook_info();
  if (isset($hook_info[$hook]['group'])) {
    module_load_include('inc', $module, $module . '.' . $hook_info[$hook]['group']);
    if (function_exists($function)) {
      return TRUE;
    }
  }
  return FALSE;
}