Thread:Project:Support desk/Fatal error update to Mediawii 1.23: DatabaseBase::factory no viable database extension found for type 'mysql'/reply (2)

try executing php, without specifying the update.php script, but with the  argument. It should display information about the loaded extensions. Look there to see if mysql or mysqli are installed. Maybe if  doesn't exists, it will ignore it even if you specify it.

In your posts I see you used  but it should be   without spaces.