module_hook

Determine whether a module implements a hook.

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

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

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

drupal_check_profile in includes/install.inc: Check a profile's requirements.
help_page in modules/help/help.module: Menu callback; prints a page listing general help for all modules.
menu_get_active_help in includes/menu.inc: Returns the help associated with the active menu item.
module_implements in includes/module.inc: Determine which modules are implementing a hook.
module_invoke in includes/module.inc: Invoke a hook in a particular module.
module_rebuild_cache in includes/module.inc: Rebuild the database cache of module files.
node_hook in modules/node/node.module: Determine whether a node hook exists.
search_admin_settings in modules/search/search.module: Menu callback; displays the search module settings page.
search_data in modules/search/search.module: Perform a standard search on the given keys, and return the formatted results.
search_menu in modules/search/search.module: Implementation of hook_menu().
system_get_module_admin_tasks in modules/system/system.module
system_modules_uninstall in modules/system/system.module: Builds a form of currently disabled modules.
user_help in modules/user/user.module: Implementation of hook_help().

includes/module.inc, line 321

<?php
function module_hook($module, $hook) {
  return function_exists($module .'_'. $hook);
}
?>

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