sending only BCC mail in php - php

Question

I am pulling email addresses from my mailing list in a txt file. with the following:
clearstatcache();
$file = file("test.txt");
for ($i = 0; $i < 20; $i++) {
$emails .= $file[$i];
}
As you can see I've stored them in $emails. and if I echo $emails, I get the emails listed:
info#example.com, test#mydomain.com, admin#domain.com, etc.
now to sending the BCC:
// recipient
$to = '';
// subject
$subject = 'The subject is here';
// message
$message = 'The body of the email is here';
// To send HTML mail, the Content-type header must be set
$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
// Additional headers
$headers .= 'From: John Doe <info#example.com>' . "\r\n";
$headers .= 'Bcc: '.$emails . "\r\n";
// Mail it
mail($to, $subject, $message, $headers);
The mail doesn't get sent to the list, only to info#example.com - So this doesn't work and something unexpected happens - for some strange reason the 20 emails from the for loop are listed at the top of the email body when received by info#example.com
When I try manual input it works perfectly. so the code below works, but manual input is counter productive to what I am trying to achieve.
$test = "info#example.com, test#mydomain.com, admin#domain.com,";
// recipient
$to = '';
// subject
$subject = 'The subject is here';
// message
$message = 'The body of the email is here';
// To send HTML mail, the Content-type header must be set
$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
// Additional headers
$headers .= 'From: John Doe <info#example.com>' . "\r\n";
$headers .= 'Bcc: '.$test . "\r\n";
// Mail it
mail($to, $subject, $message, $headers);
So it appears that the issue is in the variable, but I can't figure out why it doesn't work because $emails echoes out all the email addresses fine.

Answer 1

White space is automatically added to the end of line. This change in the for loop fixes the issue.
$emails .= trim($file[$i]);

Answer 2

You must close the loop after:
mail($to, $subject, $message, $headers);
}
and
$headers .= 'Bcc: '.$emails . "\r\n";
is
$headers .= 'Bcc: '.$file[$i] . "\r\n";
So the loop will run the entire program 20 times. Do not place recipient in $ to because otherwise will send 20 times as well.
Tested and works great.