SendGrid and PHP to multiple recipents - php

Question

I'm using sendgrid to send out html emails from a document system I'm building. When a file uploads sendgrid needs to email all those associated with that case. I have everything working for individual emails and I can customs the template I have saved but cant send the email to multiple recipients
I have generated an array of recipients
$email = array(j.bloggs#bloggs.com, j.doe#me.net, d.smith#smith.co.uk);
I want to pass this into my sendgrid email object to send to them all
private function send() {
$sg = new \SendGrid(self::$key);
$response = $sg->client->mail()->send()->post(self::$mail);
return $response->statusCode();
}
public function file_saved($file="", $case="") {
self::$from = new SendGrid\Email($this->fromName, $this->fromEmail);
self::$to = new SendGrid\Email($this->toName, $this->toEmail);
self::$content = new SendGrid\Content("text/html", "Hello, Email!");
self::$mail = new SendGrid\Mail(
self::$from,
$this->subject,
self::$to,
self::$content
);
$str = "<p>A file has been successfully uploaded to {$case->case_name} ({$case->case_code}).</p>
<br />
<p>{$file->file_name} - ".size($file->file_size)."</p>";
self::$mail->personalization[0]->addSubstitution("-name-", $this->toName);
self::$mail->personalization[0]->addSubstitution("-str-", $str);
self::$mail->personalization[0]->addSubstitution("-btn-", "Download File");
self::$mail->personalization[0]->addSubstitution("-url-", HTTP.BASE_URL.DS.'uploads'.DS.$file->file_path);
self::$mail->setTemplateId("2f845487-6243-4562-b6fb-022185b7fde7");
if (!$this->send() == 202) {
return false;
}
else {
return true;
}
}
I tried to use the personalization->to and pass that the array but get the error
Call to a member function to() on null in includes/classes/mail.php on line <b>82</b><br />

Answer 1

I just created a loop that went through each recipient and sent them an email, not as efficient as generating a multiple to: list but for now its working until I get a response from the sendgrid dev team

Answer 2

$this->email = array(j.bloggs#bloggs.com, j.doe#me.net, d.smith#smith.co.uk);
private function send() {
$sg = new \SendGrid(self::$key);
$response = $sg->client->mail()->send()->post(self::$mail);
return $response->statusCode();
}
public function file_saved($file="", $case="") {
$str = "<p>A file has been successfully uploaded to {$case->case_name} ({$case->case_code}).</p>
<br />
<p>{$file->file_name} - ".size($file->file_size)."</p>";
self::$from = new SendGrid\Email($this->fromName, $this->fromEmail);
self::$content = new SendGrid\Content("text/html", "Hello, Email!");
foreach($this->email as $email_addr) {
self::$to = new SendGrid\Email($this->toName, $email_addr);
self::$mail = new SendGrid\Mail(
self::$from,
$this->subject,
self::$to,
self::$content
);
self::$mail->personalization[0]->addSubstitution("-str-", $str);
self::$mail->personalization[0]->addSubstitution("-btn-", "Download File");
self::$mail->personalization[0]->addSubstitution("-url-", HTTP.BASE_URL.DS.'uploads'.DS.$file->file_path);
self::$mail->setTemplateId("2f845487-6243-4562-b6fb-022185b7fde7");
if (!$this->send() == 202) {
$response[$address] = false;
}
else {
$response[$address] = true;
}
}
return $response; // contains true/false for each email address if sent or not.
}