CSiteCheckerTest::check_memory_limit

function check_memory_limit()
{
	$total_steps = 5;

	if (!$this->arTestVars['last_value'])
	{
		$last_success = 0;
		$max = 16;
		$step = 1;
	}
	else
	{
		if (!CheckSerializedData($this->arTestVars['last_value']))
			return false;
		list($last_success, $max, $step) = unserialize($this->arTestVars['last_value'], ['allowed_classes' => false]);
	}

	$strRequest = "GET "."/bitrix/admin/site_checker.php?test_type=memory_test&unique_id=".checker_get_unique_id()."&max=".($max - 1)." HTTP/1.1rn";
	$strRequest.= "Host: ".$this->host."rn";
	$strRequest.= "rn";

	if (!$res = $this->ConnectToHost())
		return false;

	if (IsHttpResponseSuccess($res, $strRequest))
	{
		$last_success = $max;
		$max *= 2;
	}
	else
		$max = floor(($last_success + $max) / 2);

	if ($max < 16)
		return false;

	if ($step < $total_steps)
	{
		$this->test_percent = floor(100 / $total_steps * $step);
		$step++;
		$this->arTestVars['last_value'] = serialize(array($last_success, $max, $step));
		return true;
	}

	$ok = false;
	$res = GetMessage('SC_NOT_LESS',array('#VAL#' => $last_success));
	$last_success = (int)$last_success;
	if ($last_success > 32)
	{
		$ok = true;
		$cur = BitrixMainConfigIni::getInt('memory_limit');
		if ($cur > 0 && $cur < $last_success * 1024 * 1024)
		{
			$res .= '
 '.GetMessage('SC_MEMORY_CHANGED', array('#VAL0#' => ini_get('memory_limit'), '#VAL1#' => '512M'));
			$ok = null;
		}
	}
	return $this->Result($ok, $res);
}