Method Varien_Object::__tostring() cannot take arguments

When I try open the magento fodler to install it, I get the following error:

Fatal error: Method Varien_Object::__tostring() cannot take arguments in C:\xampp\htdocs\magento\lib\Varien\Object.php on line 488


File: /lib/Varien/Object.php (Line 484)

Change from

public function ___toString(array $arrAttributes = array(), $valueSeparator=',')

To this

public function __invoke(array $arrAttributes = array(), $valueSeparator=',')

File /app/code/core/Mage/Core/Controller/Request/Http.php (Line 274)

Change from

$host = split(':', $_SERVER['HTTP_HOST']);

To this

$host = explode(':', $_SERVER['HTTP_HOST']);