FreeBSD Release-8.1
php5-5.3.5 PHP Scripting Language
php5-pdo_sqlite-5.3.5 The pdo_sqlite shared extension for php
php5-sqlite-5.3.5 The sqlite shared extension for php
sqlite3-3.7.4 An SQL database engine in a C library

1. cat zabbix.conf.php | grep DB
   ...
   $DB["TYPE"] = 'MYSQL';
   ....

I see where the problem is. Zabbix calls class_exists() functions, which by default tries to autoload missing SQLite3 class. Fixed and a patch is attached.

Alexei, thanks for the fix, but i looked at your patch and i'am interesting whether the frontend now working with SQLite3 db-backend?
This is a complete solution or only a partial?

Yes, the front-end fully supports SQLite3. Normally it's just a matter of installing php5-sqlite package.

By the way, I did another minor fix for SQlite3 affecting installation wizard. Please use revision 17222 or later.

And I still can not understand why you have not had a problems (ZBX-3468) with SQLite3 in frontend and I had.

As you can see I have a long-Installed all the SQLite3 components.
But when in a "zabbix.conf.php" i try t use SQLite3:
$DB["TYPE"] = 'SQLITE3';
then again:
Fatal error: require_once() [function.require]: Failed opening required 'include/classes/class.sqlite3.php' (include_path='.:/usr/local/share/pear') in /usr/local/www/zabbix/include/config.inc.php on line 78

btw, do you see that a file 'include/classes/class.sqlite3.php' is missing in the SVN repository?

Are you running 17222 or later?

yes, about my two last comments -> is running at latest 17254 revision.

Alexei, your yesterday fix is gud for NONE SQLite3 db-backend. Today just for case i tried SQLite3 db-backend .

It looks like you have support of SQLite3 configure in, yet it does not provide access to the required SQLite3 class. Please could you post output of <?php phpinfo(); ?> here?

phpinfo attached as file phpinfo-freebsd81.txt

Maybe connected to ZBX-4289

Fixed in dev branch. Ready to test.

Fixed in revision 23016.