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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;
}