Codeigniter PHP多封电子邮件，从mysql获取电子邮件

我想向多个收件人发送电子邮件我有多封来自mysql的电子邮件。 我想以这种格式获取$this->email->to'email1@xx.com,email2@xx.com,email3@xx.com';

//控制器

$data['admin_emails'] = $this->Order_model->saved_admin_emails();
$saved_emails = $data['admin_emails'];
foreach ($saved_emails as $savemails) {
    $to = $savemails['email'];

//模型

public function saved_admin_emails() {
    $query = 'SELECT email from admin_users where state=1 and user_group="admin"';
    $result = $this->db->query($query);
    $dt = $result->result_array();
    $result->free_result();
    return $dt;
}

使用数组推送

array_push($to, $savemails['email']);
$this->email->to($to);

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你给我们看的只是一个SQL查询，我猜它能用吗？这是一次旅行的开始。您需要向我们展示您尝试过的完整代码。我从mysql收到的电子邮件如下admin@xxxx.com admin2@xxxx.com admin3@xxxx.com admin4@xxxx.com .... 我想把这样的邮件传递到$this->email->to$to；数组[0]=>数组[电子邮件]=>admin@xxxx.com[1]=>数组[电子邮件]=>admin2@xxxx.com[2]=>数组[电子邮件]=>admin3@xxxx.com ... 我越来越喜欢这样，我想通过这些电子邮件像这样$this->email->to'admin@xxxx.com', 'admin2@xxxx.com', 'admin3@xxxx.com“我对它进行了测试，结果相同：$to=arrayemail1，email2，'email3'；var_dump$to$to2=[]；foreach$to as$value{array_push$to2$value；}var_dump$to2；

array_push($to, $savemails['email']);
$this->email->to($to);