When there is nothing wrong with my installation folder. I am using XAMPP. [SOLVED] I struggled with this for a day when I suddenly got this error on my local xampp server. After finding out bits and pieces from various forums here is how I fixed it. First I made a back-up of my xampp folder. Then I went into the xampp folder, non back-up folder, and renamed the php folder to php-old Then I installed xampp over top (it did keep all my files and databases so I did not lose them, no promises though...