Trying to get emails from database using Yiimail - php

Question

A little background,
I'm creating a simple function that emails all users whenever the admin of a blog creates a new announcement. I want to gather all emails using an sql query and inputting them all inside the message body or perhaps looping sending the emails one at a time (though that may seem like it would take longer).
So far this is my code:
public function emailAll()
{
$this->set_mail_settings();
$message = new YiiMailMessage;
$request = Yii::app()->db->createCommand("
SELECT email FROM persons WHERE party_id
")->queryRow();
$message->subject = 'Star Cruises - Login Information';
$message->addTo('sendTo#someone.com');
$message->from = Yii::app()->params['adminEmail'];
Yii::app()->mail->send($message);
exit();
}
private function set_mail_settings()
{
$sysParam = SystemParameters::model()->getSystemParameters(
array("smtp_host", "smtp_port", 'smtp_user','smtp_password')
);
Yii::app()->mail->transportOptions['username'] = $sysParam['smtp_user'];
Yii::app()->mail->transportOptions['password'] = $sysParam['smtp_password'];
Yii::app()->mail->transportOptions['host'] = $sysParam['smtp_host'];
Yii::app()->mail->transportOptions['port'] = $sysParam['smtp_port'];
}
The emailAll() function is called whenever an email is used.
My problem is the $request. I don't know how I would gather all the emails and putting them into the $message->addTo();
UPDATE: I was doing it fine until I reached this point:
public function emailAll()
{
$this->set_mail_settings();
$message = new YiiMailMessage;
$emails = Yii::app()->db->createCommand("SELECT group_concat(email) as em FROM persons")->queryRow();
$email_ids = explode(",",$emails["em"]);
$message->setBcc($email_ids);
$message->setBody('Sample');
$message->subject = 'New Announcement!';
//$message->addTo('blah#blah.com');
$message->from = Yii::app()->params['adminEmail'];
Yii::app()->mail->send($message);
}
private function set_mail_settings()
{
$sysParam = SystemParameters::model()->getSystemParameters(
array("smtp_host", "smtp_port", 'smtp_user','smtp_password')
);
Yii::app()->mail->transportOptions['username'] = $sysParam['smtp_user'];
Yii::app()->mail->transportOptions['password'] = $sysParam['smtp_password'];
Yii::app()->mail->transportOptions['host'] = $sysParam['smtp_host'];
Yii::app()->mail->transportOptions['port'] = $sysParam['smtp_port'];
}
Then I got an error on this line from YiiMail.php:
189 $msg = 'Sending email to '.implode(', ', array_keys($message->to))."\n".
And it stated that : array_keys() expects parameter 1 to be array, null given.
I understand what it wants, but I don't understand WHY this error occurred?

Answer 1

You can get all email ids with use of below query and use BCC instead of To for security reason.
$emails = Yii::app()->db->createCommand("SELECT group_concat(email) as em FROM persons WHERE party_id = $party_id")->queryRow();
$email_ids = explode(",",$emails["em"]);
$message->setBcc($email_ids); // use bcc to hide email ids from other users
$message->addTo("noreply#yourdomain.com"); //as To is required, set some dummy id or your own id.