PHP send mail to multiple recipients without sharing email addresses - php

Question

I am trying to send email to multiple recipients using PHP. My code is like this
<?php
foreach($subscribers as $subscriber){
$email[] = $subscriber['email'];
}
$emails = implode(',', $email);
$email_from = "email#example.com";
$subject = "My Subject";
$full_name = 'Example Sender';
$from_mail = $full_name.'<'.$email_from.'>';
$email_text = file_get_contents('email.html');
$headers .= 'From: ' . $from_mail . "\r\n".
"MIME-Version: 1.0" . "\r\n" .
"Content-type: text/html; charset=UTF-8" . "\r\n";
mail($emails, $subject, $email_text, $headers);
?>
I am able to send emails correctly. But it shows others email addresses in there email box and I don't want to share email addresses with each other. Please help how can I do this. I tried to send email inside the for each loop like this
<?php
foreach($subscribers as $subscriber){
$email = $subscriber['email'];
$email_from = "email#example.com";
$subject = "My Subject";
$full_name = 'Example Sender';
$from_mail = $full_name.'<'.$email_from.'>';
$email_text = file_get_contents('email.html');
$headers .= 'From: ' . $from_mail . "\r\n".
"MIME-Version: 1.0" . "\r\n" .
"Content-type: text/html; charset=UTF-8" . "\r\n";
mail($email, $subject, $email_text, $headers);
}
?>
But it sends email to only the first email address inside loop. Please help.

Answer 1

You can add an empty string in the $email field and use bcc headers to add the mail addresses. bcc makes sure the receiver can't see the other email addresses.
$headers .= "Bcc:email#example.com" . PHP_EOL;