function Messaging_HTML_MailSystem::mimemail_rfc_headers in Messaging 7

Attempts to RFC822-compliant headers for the mail message or its MIME parts TODO could use some enhancement and stress testing

Parameters

$headers An array of headers:

Return value

header string

1 call to Messaging_HTML_MailSystem::mimemail_rfc_headers()

Messaging_HTML_MailSystem::mimemail_multipart_body in messaging_htmlmail/messaging_htmlmail.inc

File

messaging_htmlmail/messaging_htmlmail.inc, line 391

Drupal Messaging Framework - Send_Method class file

Class

Messaging_HTML_MailSystem

Sendgrid mail system

Code

function mimemail_rfc_headers($headers) {
  $header = '';
  $crlf = variable_get('mimemail_crlf', "\n");
  foreach ($headers as $key => $value) {
    $key = trim($key);

    // collapse spaces and get rid of newline characters
    $value = preg_replace('/(\\s+|\\n|\\r|^\\s|\\s$)/', ' ', $value);

    //fold headers if they're too long
    if (strlen($value) > 60) {

      //if there's a semicolon, use that to separate
      if (count($array = preg_split('/;\\s*/', $value)) > 1) {
        $value = trim(join(";{$crlf}    ", $array));
      }
      else {
        $value = wordwrap($value, 50, "{$crlf}    ", FALSE);
      }
    }
    $header .= "{$key}: {$value}{$crlf}";
  }
  return trim($header);
}