Различные конфиги для режима production и режима отладки. Два в одном

<?php
// Config base dir
$base = dirname(__FILE__).DIRECTORY_SEPARATOR.'protected'.DIRECTORY_SEPARATOR.
    'config'.DIRECTORY_SEPARATOR;

// Get the domain
$domain = $_SERVER['SERVER_NAME'];
if (strpos($domain, 'www.') !== false) {
	$domain = str_replace('www.', '', $domain);
}

if (!file_exists($base.'sites'.DIRECTORY_SEPARATOR.$domain.'.php')) {
	$domain = 'dev.example.com';
}

$main = include($base.'main.php');
$domain_config = include($base.DIRECTORY_SEPARATOR.'sites'.DIRECTORY_SEPARATOR.$domain.'.php');

// Load the Yii framework
$yii=dirname(__FILE__).DIRECTORY_SEPARATOR.'..'.DIRECTORY_SEPARATOR.'yii'
    .DIRECTORY_SEPARATOR.'framework'.DIRECTORY_SEPARATOR
    .(defined('YII_DEBUG') ? 'yii.php' : 'yiilite.php');
require_once($yii);

// Merge configs
$config = CMap::mergeArray($main, $domain_config);
// Init the application
/** @var $app CWebApplication */
$app = Yii::createWebApplication($config);
unset($domain, $base, $yii, $config, $main, $domain_config);

Yii::import("ext.yiiext.components.zendAutoloader.EZendAutoloader", true);

// you are able to load custom code that is using Zend class naming convention
// with different prefix
EZendAutoloader::$prefixes = array('Zend', 'Custom');
Yii::registerAutoloader(array("EZendAutoloader", "loadClass"));

$app->run();

<?php
return array(
	'basePath' => dirname(__FILE__) . DIRECTORY_SEPARATOR . '..',
	'defaultController' => 'site',
	'components' => array(
		'urlManager' => array(
			'urlFormat' => 'path',
			'showScriptName' => false,
			'urlSuffix'=> '.html',
			'rules' => array(
				'<lang:\w{2}>/<controller:\w+>/<id:\d+>' => '<controller>/view',
				'<lang:\w{2}>/<controller:\w+>/<action:\w+>/<id:\d+>' => '<controller>/<action>',
				'<lang:\w{2}>/<controller:\w+>/<action:\w+>' => '<controller>/<action>',
				'<lang:\w{2}>/<controller:\w+>' => '<controller>/index',
			),
		),

		'db' => array(
			'class' => 'system.db.CDbConnection',
			'charset' => 'utf8',
			'schemaCachingDuration'=>3600,
			'emulatePrepare' => true,
		),
	),
	'params' => array(
		'mail' => array(
			'smtp_from' => 'example@example.com',
			'pass' => '12345',
			'ip' => '192.168.0.1',
			'port' => '25',
		),
	),
);

<?php
return array(
	'components' => array(
		'db' => array(
			'connectionString' => 'mysql:host=mysql_host;dbname=project_db',
			'username' => 'production',
			'password' => 'production password',
		),
	),
);

<?php
defined('YII_DEBUG') or define('YII_DEBUG',true);
defined('YII_TRACE_LEVEL') or define('YII_TRACE_LEVEL',3);
return array(
	'components' => array(
		'db' => array(
			'connectionString' => 'mysql:host=localhost;dbname=project_db',
			'username' => 'devuser',
			'password' => 'dev password',
			'enableProfiling' => true,
			'enableParamLogging' => true,
			'schemaCachingDuration' => 0,
		),
	),
	'params' => array(
		'mail' => array(
			'smtp_from' => 'test@example.com',
			'pass' => 'localtest',
			'ip' => 'localhost',
			'port' => '25',
		),
	),
);