CPageCache::InitCache

function InitCache($TTL, $uniq_str, $initdir = false, $basedir = "cache")
{
	/** @global CMain $APPLICATION */
	global $APPLICATION, $USER;
	if($initdir === false)
		$initdir = $APPLICATION->GetCurDir();

	$this->basedir = BX_PERSONAL_ROOT."/".$basedir."/";
	$this->initdir = $initdir;
	$this->filename = "/".CPageCache::GetPath($uniq_str);
	$this->ttl = $TTL;
	$this->uniq_str = $uniq_str;

	if($TTL<=0)
		return false;

	if(is_object($USER) && $USER->CanDoOperation('cache_control'))
	{
		if(isset($_GET["clear_cache_session"]))
		{
			if(mb_strtoupper($_GET["clear_cache_session"]) == "Y")
				BitrixMainApplication::getInstance()->getKernelSession()["SESS_CLEAR_CACHE"] = "Y";
			elseif (!empty($_GET["clear_cache_session"]))
				unset(BitrixMainApplication::getInstance()->getKernelSession()["SESS_CLEAR_CACHE"]);
		}

		if(isset($_GET["clear_cache"]) && mb_strtoupper($_GET["clear_cache"]) == "Y")
			return false;
	}

	if(isset(BitrixMainApplication::getInstance()->getKernelSession()["SESS_CLEAR_CACHE"]) && BitrixMainApplication::getInstance()->getSession()["SESS_CLEAR_CACHE"] == "Y")
		return false;

	if(!$this->_cache->read($this->content, $this->basedir, $this->initdir, $this->filename, $this->ttl))
		return false;

	if (BitrixMainDataCache::getShowCacheStat())
	{
		$read = 0;
		$path = '';
		if ($this->_cache instanceof BitrixMainDataICacheEngineStat)
		{
			$read = $this->_cache->getReadBytes();
			$path = $this->_cache->getCachePath();
		}
		elseif ($this->_cache instanceof ICacheBackend)
		{
			/** @noinspection PhpUndefinedFieldInspection */
			$read = $this->_cache->read;

			/** @noinspection PhpUndefinedFieldInspection */
			$path = $this->_cache->path;
		}

		BitrixMainDiagCacheTracker::addCacheStatBytes($read);
		BitrixMainDiagCacheTracker::add($read, $path, $this->basedir, $this->initdir, $this->filename, "R");
	}
	return true;
}