fix "PHP Extensions “0” must be loaded" when magento locally install February 18, 2014 Replace in file app/code/core/Mage/Install/etc/config.xml (near 71th string): <extensions> <pdo_mysql></pdo_mysql> </extensions> with this <extensions> <pdo_mysql>1</pdo_mysql> </extensions> Thanks : http://stackoverflow.com/ Read more