Block::isContains

static function isContains(int $entityId, string $needed, bool $isLanding = false): bool
{
	$filter = [
		'=ACTIVE' => 'Y',
		'=DELETED' => 'N',
		'CONTENT' => '%' . $needed . '%',
	];
	if ($isLanding)
	{
		$filter['LID'] = $entityId;
	}
	else
	{
		$filter['ID'] = $entityId;
	}
	$res = parent::getList([
		'select' => [
			'LID',
			'SITE_ID' => 'LANDING.SITE_ID',
		],
		'filter' => $filter,
	]);
	if ($row = $res->fetch())
	{
		$res = Landing::getList([
			'select' => [
				'ID'
			],
			'filter' => [
				'ID' => $row['LID']
			]
		]);
		if ($res->fetch())
		{
			return true;
		}

		if (BitrixLandingSiteScopeGroup::getGroupIdBySiteId($row['SITE_ID'], true))
		{
			return true;
		}
	}

	return false;
}