CAllDBResult::NavStart

public function NavStart($nPageSize = 0, $bShowAll = true, $iNumPage = false)
{
	if ($this->bFromLimited)
	{
		return;
	}

	if (is_array($nPageSize))
	{
		$this->InitNavStartVars($nPageSize);
	}
	else
	{
		$this->InitNavStartVars(intval($nPageSize), $bShowAll, $iNumPage);
	}

	if ($this->bFromArray)
	{
		$this->NavRecordCount = count($this->arResult);
		if ($this->NavRecordCount < 1)
		{
			return;
		}

		if ($this->NavShowAll)
		{
			$this->NavPageSize = $this->NavRecordCount;
		}

		$this->NavPageCount = floor($this->NavRecordCount / $this->NavPageSize);
		if ($this->NavRecordCount % $this->NavPageSize > 0)
		{
			$this->NavPageCount++;
		}

		$useSession = (CPageOption::GetOptionString("main", "nav_page_in_session", "Y") == "Y");
		$this->calculatePageNumber(1, $useSession);

		$NavFirstRecordShow = $this->NavPageSize * ($this->NavPageNomer - 1);
		$NavLastRecordShow = $this->NavPageSize * $this->NavPageNomer;

		$this->arResult = array_slice($this->arResult, $NavFirstRecordShow, $NavLastRecordShow - $NavFirstRecordShow);
	}
	else
	{
		$this->DBNavStart();
	}
}