autoloader.php

<?php
$loader = require_once 'vendor/autoload.php';
defined('DS') || define('DS', DIRECTORY_SEPARATOR);
defined('ZETTA_MODE') || define('ZETTA_MODE', (getenv('ZETTA_MODE') ? getenv('ZETTA_MODE') : 'production'));
defined('SYSTEM_PATH') || define('SYSTEM_PATH', realpath($loader->getPrefixes()['Zetta_'][0] . '/../'));
defined('ZETTA_FRAMEWORK_PATH') || define('ZETTA_FRAMEWORK_PATH', realpath(SYSTEM_PATH . DS . 'Zetta'));
defined('FILE_PATH') || define('FILE_PATH', realpath(dirname(__FILE__)));
defined('TEMP_PATH') || define('TEMP_PATH', realpath(FILE_PATH . DS . 'Temp'));
defined('MODULES_PATH') || define('MODULES_PATH', realpath(SYSTEM_PATH . DS . 'Modules'));
defined('HEAP_PATH') || define('HEAP_PATH', realpath(FILE_PATH . DS . 'Heap'));
defined('USER_FILES_PATH') || define('USER_FILES_PATH', realpath(FILE_PATH . DS . 'UserFiles'));
defined('LIBRARY_PATH') || define('LIBRARY_PATH', realpath(SYSTEM_PATH . DS . 'Library'));
defined('USER_LIBRARY_PATH') || define('USER_LIBRARY_PATH', realpath(FILE_PATH . DS . 'Library'));

if (!defined('HTTP_HOST')) {
    // вычисляем HTTP_HOST

    if (array_key_exists('SERVER_NAME', $_SERVER)) {
        define('HTTP_HOST', 'http://' . $_SERVER['SERVER_NAME']);
    } else {
        $arrayInput = getopt(false, array('host:'));
        if (is_array($arrayInput) && array_key_exists('host', $arrayInput)) {
            define('HTTP_HOST', 'http://' . $arrayInput['host']);
        }
    }
}

set_include_path(
    LIBRARY_PATH . PATH_SEPARATOR
    . USER_LIBRARY_PATH . PATH_SEPARATOR
    . HEAP_PATH . PATH_SEPARATOR
    . SYSTEM_PATH . PATH_SEPARATOR
    . get_include_path()
);

$autoloader = Zend_Loader_Autoloader::getInstance();
$autoloader->setFallbackAutoloader(true);