Cache::get() 

\nn\t3::Cache()->get($identifier = '', $useRamCache = false); 

Reads the content of the Typo3 cache using an identifier. The identifier is any string or array that uniquely identifies the cache.

\nn\t3::Cache()->get('myid');
\nn\t3::Cache()->get(['pid'=>1, 'uid'=>'7']);
\nn\t3::Cache()->get(['func'=>__METHOD__, 'uid'=>'17']);
\nn\t3::Cache()->get([__METHOD__=>$this->request->getArguments()]);
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@param mixed $identifier String or array to identify the cache
@param mixed $useRamCache temporary cache in $GLOBALS instead of caching framework

| @return mixed

Source Code 

public function get( $identifier = '', $useRamCache = false )
{
	$identifier = self::getIdentifier( $identifier );
	// Ram-Cache verwenden? Einfache globale.
	if ($useRamCache && ($cache = $GLOBALS['nnhelpers_cache'][$identifier] ?? false)) {
		return $cache;
	}
	$cacheUtility = $this->getCacheInstance();
	if (!$cacheUtility) {
		return false;
	}
	if ($data = $cacheUtility->get($identifier)) {
		$data = json_decode( $cacheUtility->get($identifier), true );
		if ($data['content'] && $data['expires'] < time()) return false;
		return $data['content'] ?: false;
	}
	return false;
}
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