yii2 cron giving error of "PDO not found" - php

Question

I am running application well in yii2. I created a command controller /commands/TestController
<?php
namespace app\commands;
use app\models\UserProfile;
use yii\console\Controller;
use app\controllers\AppController;
/**
* Test controller
*/
class TestController extends Controller
{
public function actionIndex()
{
echo "cron service running";
}
public function actionSendBirthdaySms()
{
$userProfile = UserProfile::find()
->where('MONTH(dob) = MONTH(DATE(NOW()))')
->andWhere('DAY(dob) = DAY(NOW()) ')
->with('user')
->asArray()
->all();
foreach($userProfile as $item){
$birthdayMessage = "Happy Birthday " . $item['user']['username'];
//to send sms
$this->_send_cron_sms($item['mobile'], $birthdayMessage);
}
}
I have two functions here. When I call php /home/user/public_html/yii test/index it gives the correct output with command line and cron both.
But when I am running php /home/user/public_html/yii test/send-birthday-sms, it runs OK with command line in ssh environment and I am receiving the SMS. But giving error in cron. Here is what I received in email:
Status: 500 Internal Server Error
X-Powered-By: PHP/5.4.39
Content-type: text/html
PHP Fatal Error 'yii\base\ErrorException' with message 'Class 'PDO' not found'
in /home/user/public_html/vendor/yiisoft/yii2/db/Connection.php:609
Stack trace:
#0 [internal function]: yii\base\ErrorHandler->handleFatalError()
#1 {main}
I also tried query builder but it also did not helped me.

Answer 1

I have solved the issue by adding these two extensions in php.ini file
extension=pdo.dll
extension=pdo_mysql.dll
I already asked the same question in Yii forum