Magento install error PHP Extensions "0" must be loaded
If this error < PHP Extensions “0” must be loaded > happend when you tried to install magento…
How to fix:
1) Open the file: app/code/core/Mage/Install/etc/config.xml
2) Search for:
<extensions> <pdo_mysql/> </extensions>
3) Replace with:
<extensions> <pdo_mysql>1</pdo_mysql> </extensions>
Now try to install magento again.
ps: The problem apeared becouse there is an ‘wrong’ version of SimpleXml extension installed on your PHP server.