Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Extension/ModuleHandler.php \Drupal\Core\Extension\ModuleHandler::verifyImplementations()
2. 8.9.x core/lib/Drupal/Core/Extension/ModuleHandler.php \Drupal\Core\Extension\ModuleHandler::verifyImplementations()
3. 10 core/lib/Drupal/Core/Extension/ModuleHandler.php \Drupal\Core\Extension\ModuleHandler::verifyImplementations()

Verifies an array of implementations loaded from cache.

Verification is done by including the lazy-loaded $module.$group.inc file, and checking function_exists().

Parameters

string[] $implementations: Implementation "group" by module name.

string $hook: The hook name.

Return value

bool TRUE, if all implementations exist. FALSE, if one or more implementations don't exist and need to be removed from the cache.

1 call to ModuleHandler::verifyImplementations()

ModuleHandler::getImplementationInfo in core/lib/Drupal/Core/Extension/ModuleHandler.php

Provides information about modules' implementations of a hook.

File

core/lib/Drupal/Core/Extension/ModuleHandler.php, line 688

Class

ModuleHandler

Class that manages modules in a Drupal installation.

Namespace

Drupal\Core\Extension

Code

protected function verifyImplementations(&$implementations, $hook) {
    $all_valid = TRUE;
    foreach ($implementations as $module => $group) {
        // If this hook implementation is stored in a lazy-loaded file, include
        // that file first.
        if ($group) {
            $this->loadInclude($module, 'inc', "{$module}.{$group}");
        }
        // It is possible that a module removed a hook implementation without
        // the implementations cache being rebuilt yet, so we check whether the
        // function exists on each request to avoid undefined function errors.
        // Since ModuleHandler::implementsHook() may needlessly try to
        // load the include file again, function_exists() is used directly here.
        if (!function_exists($module . '_' . $hook)) {
            // Clear out the stale implementation from the cache and force a cache
            // refresh to forget about no longer existing hook implementations.
            unset($implementations[$module]);
            // One of the implementations did not exist and needs to be removed in
            // the cache.
            $all_valid = FALSE;
        }
    }
    return $all_valid;
}

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