eZ\Publish\Core\Repository\LocationService::copySubtree PHP Method

    public function copySubtree(APILocation $subtree, APILocation $targetParentLocation)
    {
        $loadedSubtree = $this->loadLocation($subtree->id);
        $loadedTargetLocation = $this->loadLocation($targetParentLocation->id);
        if (stripos($loadedTargetLocation->pathString, $loadedSubtree->pathString) !== false) {
            throw new InvalidArgumentException('targetParentLocation', 'target parent location is a sub location of the given subtree');
        }
        // check create permission on target
        if (!$this->repository->canUser('content', 'create', $loadedSubtree->getContentInfo(), $loadedTargetLocation)) {
            throw new UnauthorizedException('content', 'create');
        }
        /** Check read access to whole source subtree
         * @var bool|\eZ\Publish\API\Repository\Values\Content\Query\Criterion
         */
        $contentReadCriterion = $this->permissionsCriterionHandler->getPermissionsCriterion();
        if ($contentReadCriterion === false) {
            throw new UnauthorizedException('content', 'read');
        } elseif ($contentReadCriterion !== true) {
            // Query if there are any content in subtree current user don't have access to
            $query = new Query(array('limit' => 0, 'filter' => new CriterionLogicalAnd(array(new CriterionSubtree($loadedSubtree->pathString), new CriterionLogicalNot($contentReadCriterion)))));
            $result = $this->repository->getSearchService()->findContent($query, array(), false);
            if ($result->totalCount > 0) {
                throw new UnauthorizedException('content', 'read');
            }
        }
        $this->repository->beginTransaction();
        try {
            $newLocation = $this->persistenceHandler->locationHandler()->copySubtree($loadedSubtree->id, $loadedTargetLocation->id);
            $content = $this->repository->getContentService()->loadContent($newLocation->contentId);
            $urlAliasNames = $this->nameSchemaService->resolveUrlAliasSchema($content);
            foreach ($urlAliasNames as $languageCode => $name) {
                $this->persistenceHandler->urlAliasHandler()->publishUrlAliasForLocation($newLocation->id, $loadedTargetLocation->id, $name, $languageCode, $content->contentInfo->alwaysAvailable);
            }
            $this->persistenceHandler->urlAliasHandler()->locationCopied($loadedSubtree->id, $newLocation->id, $loadedTargetLocation->id);
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }
        return $this->domainMapper->buildLocationDomainObject($newLocation);
    }