osTicket 1.9.5Ubuntu 12.04PHP 5.3.10MySQL 5.5.35Apache 2.2.22phar is checked under PHP extensions.I am wanting to install the auth-passthru and auth-ldap. I downloaded both from osticket.com/downloads and copied them to the plugins directory (just the .phar file). My first question is hopefully simple: is that the extent of what needs to be done, or does the phar file need to be extracted into the plugins folder?Secondly, when I click the Add New Plugin link, I get the following error in what appears to be the footer of the page: Warning: Invalid callback self:, cannot access self:: when no class scope is active in /var/www/include/mysqli.php on line 157Line 157 - 160 reads:if ($__db->unbuffered_result) {    $__db->unbuffered_result->free();    $__db->unbuffered_result = false;}Admittedly, the above lines probably don't tell enough, but thought I'd at least start with that info as the error has me puzzled - nothing showing up in any of the error logs.Now, I have made some core file changes (nothing substantial, mostly CSS changes and adding a Close button to the client side ticket thread page) and installed the Ticket Status Module mod, but wanted to see if there was something maybe I am missing (i.e. the phar needed to be extracted) before I revert back to an unaltered install and try again. Thanks.