Yii2 - mailer - send message to email rows in database - arrays

Question

Greetings,
i need to send email to several recipients that are stored in a table named mail which has a field called email.
In my controller i created an action that Query the table mail for the emails.
Later i tried to use the implode() function separated by comma, but obviously it didn't work because of mailer policies.
It generated the wrong format -> "email1#mail.com, email2#mail.com, email3#mail.com".
Tried also a for each loop and the serialize() function without success.
The json_encode() function is close to what i need, separate an array of emails to something like -> "email1#mail.com", "email2#mail.com", "email3#mail.com".
But it appends the field name before the value and it is not accepted by mailer policies.
So far i'm stuck with the following code:
public function actionSucesso()
{
$query = new Query;
$query->select('email')
->from('mail');
$command = $query->createCommand();
$enderecos = $command->queryAll();
$enviar = json_encode($enderecos);
Yii::$app->mailer->compose()
->setFrom('atf#website.com')
->setTo($enviar)
->setSubject('Oferta de jogo no site da ATF.')
->setTextBody('Aceda em: http://atf.besaba.com/index.php?r=playschedule%2Findex2')
->send();
return $this->render('sucesso');
}
I think in order for the mailer to work and send the message the correct format needs to be: ->setTo("mail1#mail.com", "mail2#mail.com", "mail3#mail.com")
Is there a way of solving this problem?
Many thanks in advance.

Answer 1

To get array of email with numeric indexes call queryAll() method with $fetchMode parameter \PDO::FETCH_COLUMN, and then just pass returned array to mailer's setTo() method. Like this
$enderecos = $command->queryAll(\PDO::FETCH_COLUMN);
//$enviar = json_encode($enderecos); <- this line no needed
Yii::$app->mailer->compose()
->setFrom('atf#website.com')
->setTo($enderecos) //you pass an array of email addresses
->setSubject('Oferta de jogo no site da ATF.')
->setTextBody('Aceda em: http://atf.besaba.com/index.php?r=playschedule%2Findex2')
->send();
See queryAll() documentation and list of pdo constant including available fetch modes starting with PDO::FETCH_. Also assuming you are using yii2 default mailer, look for swiftmailer documentation about how to set recipients