Blank Cart and Checkout page problem in Magento

I have team of 8-10 people working in the Magento for beginner to expert level of the project, one of my team member was stucking on the Blank Cart and Checkout page problem. The problem was when we put items into add to cart then cart page and checkout

The PDO extension is required for this adapter but the extension is not loaded in Magento Error

Today I have moved one website from our testing server to the client server and getting such kind of the error that The PDO extension is required for this adapter but the extension is not loaded. I was thinking that there must be pdo.so php extension which is not

Set “date.timezone” option in php.ini

Today, I was trying to install the Zencart on my local system and getting this error "ERROR: date.timezone not set in php.ini. Please contact your hosting company to set the timezone in the server PHP configuration before continuing." According to the error it is clear that there is date.timezone