<pre><?php
ini_set('display_errors',1);
set_include_path('.'
    . PATH_SEPARATOR . dirname(__FILE__).'/lib/library'
    . PATH_SEPARATOR . get_include_path()
);
require_once('Zend/Db.php');


$dsn = array(
    'username' => '***',
    'password' => '***',
    'host' => '***',
    'dbname' => '***',
);
$z = Zend_Db::factory('Pdo_Mysql', $dsn);

// DOES NOT WORK
$s = $z->query('SELECT id
                    FROM language
                    WHERE language = ?',
                    array(2)
                );
print_r($s->fetchAll());

// WORKS
$s = $z->query('SELECT id
                    FROM language
                    WHERE language = 2'
                );
print_r($s->fetchAll());


?></pre>