function 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

File

includes/module.inc, line 688

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;
}