Yes it is confirm this error came only because of older version of PHP
I never changed PHP version but my blog hacked by someone and virus code added to my blog ..so i guess hacker changed my php version …if u can’t change your php then you need to contact your web host because WordPress requires at least PHP-5.2.4
same issue from last 2 hours after manual upgradation to wordpress ..I googled the issue some say it is because PHP version of particular domain … but I checked I do not have permission to set different php version to each domain so I wrote to web host ..they may help ….I will let you know the solution after their reply..
if any one know then plz post
