Pimcore\Model\Element\Tag::setTagsForElement PHP Method

    public static function setTagsForElement($cType, $cId, array $tags)
    {
        $tag = new Tag();
        $tag->getDao()->setTagsForElement($cType, $cId, $tags);
    }

\Pimcore::getEventManager()->attach(["admin.object.get.preSendData", "admin.asset.get.preSendData", "admin.document.get.preSendData"], ["\\Pimcore\\WorkflowManagement\\EventHandler", "adminElementGetPreSendData"]);
// backed search
foreach (["asset", "object", "document"] as $type) {
    \Pimcore::getEventManager()->attach($type . ".postAdd", ["Pimcore\\Search\\EventHandler", "postAddElement"]);
    \Pimcore::getEventManager()->attach($type . ".postUpdate", ["Pimcore\\Search\\EventHandler", "postUpdateElement"]);
    \Pimcore::getEventManager()->attach($type . ".preDelete", ["Pimcore\\Search\\EventHandler", "preDeleteElement"]);
}
// UUID
$conf = \Pimcore\Config::getSystemConfig();
if ($conf->general->instanceIdentifier) {
    foreach (["asset", "object", "document", "object.class"] as $type) {
        \Pimcore::getEventManager()->attach($type . ".postAdd", function ($e) {
            \Pimcore\Model\Tool\UUID::create($e->getTarget());
        });
        \Pimcore::getEventManager()->attach($type . ".postDelete", function ($e) {
            $uuidObject = \Pimcore\Model\Tool\UUID::getByItem($e->getTarget());
            if ($uuidObject instanceof \Pimcore\Model\Tool\UUID) {
                $uuidObject->delete();
            }
        });
    }
}
//assign tags after copying an element
Pimcore::getEventManager()->attach(["document.postCopy", "asset.postCopy", "object.postCopy"], function (\Zend_EventManager_Event $e) {
    $elementType = strtok($e->getName(), '.');
    /** @var \Pimcore\Model\Element\AbstractElement $copiedElement */
    $copiedElement = $e->getTarget();
    /** @var \Pimcore\Model\Element\AbstractElement $baseElement */
    $baseElement = $e->getParam('base_element');
    \Pimcore\Model\Element\Tag::setTagsForElement($elementType, $copiedElement->getId(), \Pimcore\Model\Element\Tag::getTagsForElement($elementType, $baseElement->getId()));
});