PDOException could not find driverI have just installed Debian Lenny with Apache, My. SQL, and PHP and I am receiving a PDOException could not find driver. This is the specific line of code it is referring to dbh new PDOmysql host. Office Compatibility Patch. DBHOST. dbname. DBNAME, DBUSER, DBPASSDBHOST, DBNAME, DBUSER, and DBPASS are constants that I have defined. It works fine on the production server and on my previous Ubuntu Server setup. Is this something to do with my PHP installationSearching the internet has not helped, all I get is experts exchange and examples, but no solutions. Php Mysqli Extension Is Missing Windows Update' title='Php Mysqli Extension Is Missing Windows Update' />There are currently 213 responses to How To Install PHP on IIS 6. Why not let us know what you think by adding your own comment Your opinion is as valid as. How install Apache 2. PHP 5. 4 and MySQL 5.