Yii bootstrapper for server specific configurations (Yii 1.1.x)

configure.php

<?php

//determine application environment
if(!defined('YII_ENV')) {
	if(($env = getenv('YII_ENV'))===false) {
		$env='production';//by default
	}
	define('YII_ENV', $env);
	unset($env);
}

//get default & server config
$configMain = require(__DIR__ . '/protected/config/main.php');
$configServer = require(__DIR__ . '/protected/config/server.' . YII_ENV . '.php');

//merge and return config
return CMap::mergeArray($configMain, $configServer);

index.php

<?php
/* Yii Web Application Entry Script */

// default constants
defined('YII_DEBUG') or define('YII_DEBUG', false);
defined('YII_TRACE_LEVEL') or define('YII_TRACE_LEVEL', 3);
// define('YII_ENV', 'development'); //comment out or set OS Environment Variable YII_ENV. Default: production 

// load framework
require_once(__DIR__ . '/../framework/yii.php');
// load configuration
$config = require('configure.php');

// start application
Yii::createWebApplication($config)->run();