Default date format in oracle is DD-MON-RR (25-JAN-18).
With that output, we can't using date formatting.
Too solve this issue, we must change date format oracle like date commonly using
ALTER SESSION SET NLS_DATE_FORMAT=...
For complete script
`
return [
'class' => 'yii\db\Connection',
'dsn' => 'oci:host=127.0.0.1:1521/XE',
'username' => 'YOUR_USERNAME',
'password' => 'YOUR_PASSWORD',
'charset' => 'utf8',
// Schema cache options (for production environment)
//'enableSchemaCache' => true,
//'schemaCacheDuration' => 60,
//'schemaCache' => 'cache',
'on afterOpen' => function($event) {
// $event->sender refers to the DB connection
$event->sender->createCommand("ALTER SESSION SET NLS_DATE_FORMAT='DD-MM-YYYY hh24:mi:ss'")->execute();
}
];
`