Split emails based on attachment sizes

[walermo]

I am using a script to send files by email. Currently my script calculates the sum of all file sizes and if the sum > 20MB it sends as many emails as there are attachments. If the size < 20MB then all documents are attached to a single email.

 

Ideally, I would like to keep each email sent to a maximum of 10MB regardless of the number of attachments.

 

Any suggestions on how I can accomplish this?

 

Below the relevant part of my script:

$attachments_size = 0;

foreach ($files as $attachment) { // calculate size of all attachments

    $url = "/path/to/attachments/{$attachment['attachment_filename']}";

    $url = stat(iconv('UTF-8', 'ISO-8859-1', $url));

    $attachments_size += $url[7];

}

$attachments = array();

if ($attachments_size > 20971520) { // send 1 attachment per email

    $email_count = 1;

    foreach ($files as $attachment) {

        $subject ="[" . $attachment_id . "]-[" . $email_count . "/" . $file_count . "] " . $attachment['attachment_filename']; // file_count = number of attachments

        array_push($attachments, $attachment['attachment_filename']);

        $send_it = send_to_scans($subject, $body, $attachments); // sends using PHPMailer

        $email_count++;

    }

}

else { // send all attachments in 1 email

    $subject = "[" . $attachment_id . "] " . ($file_count > 1 ? "Multiple files attached" : $attachment['attachment_filename']);

    foreach ($files as $attachment) {

        array_push($attachments, $attachment['attachment_filename']);

    }

    $send_it = send_to_scans($subject, $body, $attachments); // sends using PHPMailer

}