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.

form_textarea in includes/common.inc: Format a multiple-line text field.
help_links_as_list in modules/help.module
help_menu in modules/help.module: Implementation of hook_menu().
help_page in modules/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.
node_list in modules/node.module: Get a list of all the defined node types.
search_admin in modules/search.module: Menu callback; displays the search module settings page.
search_data in modules/search.module: Perform a standard search on the given keys, and return the formatted results.
search_menu in modules/search.module: Implementation of hook_menu().
system_menu in modules/system.module: Implementation of hook_menu().
system_module_listing in modules/system.module: Generate a list of all the available modules, as well as update the system list.
theme_search_item in modules/search.module: Format a single result entry of a search query.
user_authenticate in modules/user.module
user_auth_help_links in modules/user.module
user_help in modules/user.module: Implementation of hook_help().

includes/module.inc, line 135

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

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