Add xxx_installer::upgrade($version) method so that upgrade stanzas
are separate from install stanzas. In the old code, to do an upgrade
meant that you had to re-evolve everything from the initial install
because we'd step through each version's changes. But what we really
want is for the initial install to start off in the perfect initial
state, and the upgrades to do the work behind the scenes. So now the
install() function gets things set up properly the first time, and the
upgrade() function does any work to catch you up to the latest code.
See gallery_installer.php for a good example.
Install: <module>_installer::install() is called, any necessary tables
are created.
Activate: <module>_installer::activate() is called. Module
controllers are routable, helpers are accessible, etc. The module is
in use.
Deactivate: <module>_installer::deactivate() is called. Module code
is not accessible or routable. Module is *not* in use, but its tables
are still around.
Uninstall: <module>_installer::uninstall() is called. Module is
completely removed from the database.
Admin > Modules will install and activate modules, but will only
deactivate (will NOT uninstall modules).
run faster. This fixes ticket #235.
Incidentally, refactor exif and search to use the same patterns
overall so that if you understand one, you understand the other and
they generally use the same strings for localization.
File_Structure_Test to make sure we don't regress.
According to the PHP docs, the "public" keyword is implied on static
functions, so remove it. Also, require private static functions to
start with an _.
http://php.net/manual/en/language.oop5.visibility.php
