How to solve PHP Extensions “0” must be loaded?

Question

I am trying to install Magento on my server. I did everything, as written in docs. I have following error:

PHP Extensions “0” must be loaded

It occurs when I try to configure Magento in my browser, on the second page. Do you know how to fix this?

Answer 1

If you are installing Magento version 1.7.0.1, try the following to solve your issue:

Replace in file app/code/core/Mage/Install/etc/config.xml (near 71th string):

<extensions>
    <pdo_mysql/>
</extensions>

with this

<extensions>
    <pdo_mysql>1</pdo_mysql>
</extensions>