return [
    'class' => 'yii\db\Connection',
    'dsn' => 'mysql:host=localhost;dbname=exodussc_bdsis_pibaustin',
    'username' => 'root',
    'password' => '',
    'charset' => 'utf8',
];
<pre>An Error occurred while handling another error:
yii\web\HeadersAlreadySentException: Headers already sent in /home/exodusscom/public_html/sistema/config/db.php on line 1. in /home/exodusscom/public_html/sistema/vendor/yiisoft/yii2/web/Response.php:366
Stack trace:
#0 /home/exodusscom/public_html/sistema/vendor/yiisoft/yii2/web/Response.php(339): yii\web\Response-&gt;sendHeaders()
#1 /home/exodusscom/public_html/sistema/vendor/yiisoft/yii2/web/ErrorHandler.php(135): yii\web\Response-&gt;send()
#2 /home/exodusscom/public_html/sistema/vendor/yiisoft/yii2/base/ErrorHandler.php(111): yii\web\ErrorHandler-&gt;renderException(Object(yii\base\InvalidConfigException))
#3 [internal function]: yii\base\ErrorHandler-&gt;handleException(Object(yii\base\InvalidConfigException))
#4 {main}
Previous exception:
yii\base\InvalidConfigException: Unexpected configuration type for the &quot;db&quot; component: integer in /home/exodusscom/public_html/sistema/vendor/yiisoft/yii2/di/ServiceLocator.php:208
Stack trace:
#0 /home/exodusscom/public_html/sistema/vendor/yiisoft/yii2/di/ServiceLocator.php(261): yii\di\ServiceLocator-&gt;set(&#039;db&#039;, 1)
#1 /home/exodusscom/public_html/sistema/vendor/yiisoft/yii2/base/Component.php(180): yii\di\ServiceLocator-&gt;setComponents(Array)
#2 /home/exodusscom/public_html/sistema/vendor/yiisoft/yii2/BaseYii.php(546): yii\base\Component-&gt;__set(&#039;components&#039;, Array)
#3 /home/exodusscom/public_html/sistema/vendor/yiisoft/yii2/base/BaseObject.php(107): yii\BaseYii::configure(Object(yii\web\Application), Array)
#4 /home/exodusscom/public_html/sistema/vendor/yiisoft/yii2/base/Application.php(206): yii\base\BaseObject-&gt;__construct(Array)
#5 /home/exodusscom/public_html/sistema/index.php(12): yii\base\Application-&gt;__construct(Array)
#6 {main}</pre>