ActiveRecord.php

<?php
if(!defined('PHP_VERSION_ID') || PHP_VERSION_ID < 50300) {
    die('PHP ActiveRecord requires PHP 5.3 or higher');
}

define('PHP_ACTIVERECORD_VERSION_ID', '1.0');

if(!defined('PHP_ACTIVERECORD_AUTOLOAD_PREPEND')) {
    define('PHP_ACTIVERECORD_AUTOLOAD_PREPEND', true);
}

require __DIR__ . '/lib/Singleton.php';
require __DIR__ . '/lib/Config.php';
require __DIR__ . '/lib/Utils.php';
require __DIR__ . '/lib/DateTime.php';
require __DIR__ . '/lib/Model.php';
require __DIR__ . '/lib/Table.php';
require __DIR__ . '/lib/ConnectionManager.php';
require __DIR__ . '/lib/Connection.php';
require __DIR__ . '/lib/SQLBuilder.php';
require __DIR__ . '/lib/Reflections.php';
require __DIR__ . '/lib/Inflector.php';
require __DIR__ . '/lib/CallBack.php';
require __DIR__ . '/lib/Exceptions.php';
require __DIR__ . '/lib/Cache.php';

if(!defined('PHP_ACTIVERECORD_AUTOLOAD_DISABLE')) {
    spl_autoload_register('activerecord_autoload', false, PHP_ACTIVERECORD_AUTOLOAD_PREPEND);
}

function activerecord_autoload($class_name) {
    $path = ActiveRecord\Config::instance()->get_model_directory();
    $root = realpath(isset($path) ? $path : '.');

    if(($namespaces = ActiveRecord\get_namespaces($class_name))) {
        $class_name = array_pop($namespaces);
        $directories = array();

        foreach($namespaces as $directory) {
            $directories[] = $directory;
        }

        $root .= DIRECTORY_SEPARATOR . implode($directories, DIRECTORY_SEPARATOR);
    }

    $file = "$root/$class_name.php";

    if(file_exists($file)) {
        require_once $file;
    }
}