OJS white page problem

Hello all, I have a problem with my page, it is white. I enabled error and have

Deprecated : Methods with the same name as their class will not be constructors in a future version of PHP; Application has a deprecated constructor in /home//classes/core/Application.inc.php* on line 36

Deprecated : Methods with the same name as their class will not be constructors in a future version of PHP; PKPApplication has a deprecated constructor in /home/****/lib/pkp/classes/core/PKPApplication.inc.php on line 39

Deprecated : Non-static method PKPApplication::defineExposedConstant() should not be called statically in /home//lib/pkp/classes/core/PKPApplication.inc.php* on line 545

Deprecated : Non-static method PKPApplication::getExposedConstants() should not be called statically in /home//lib/pkp/classes/core/PKPApplication.inc.php* on line 513

Fatal error : Cannot use ‘String’ as class name as it is reserved in /home//lib/pkp/classes/core/String.inc.php* on line 57

Hi @komir,

Your PHP has been upgraded to a newer version than OJS 2.4.8-3 supports. You can either downgrade PHP, or upgrade OJS.

Regards,
Alec Smecher
Public Knowledge Project Team