protected function _createHeaderString()
{
/* collect header string */
$this->_headerString = 'MIME-Version: 1.0' . PHP_EOL;
/* empty attachment */
if (!$this->_attachmentArray) {
$this->_headerString .= 'Content-Type: text/html; charset=' . Db::getSetting('charset') . PHP_EOL;
} else {
foreach ($this->_attachmentArray as $file => $content) {
$content = chunk_split(base64_encode($content));
$boundary = uniqid();
$this->_headerString .= 'Content-Type: multipart/mixed; boundary="' . $boundary . '"' . PHP_EOL . PHP_EOL;
$this->_headerString .= '--' . uniqid() . PHP_EOL;
/* integrate body string */
if ($this->_bodyString) {
$this->_headerString .= 'Content-Type: text/html; charset=' . Db::getSetting('charset') . PHP_EOL;
$this->_headerString .= 'Content-Transfer-Encoding: 8bit' . PHP_EOL . PHP_EOL;
$this->_headerString .= $this->_bodyString . PHP_EOL . PHP_EOL;
$this->_headerString .= '--' . $boundary . PHP_EOL;
/* reset body string */
$this->_bodyString = null;
}
$this->_headerString .= 'Content-Type: application/octet-stream; name="' . $file . '"' . PHP_EOL;
$this->_headerString .= 'Content-Transfer-Encoding: base64' . PHP_EOL;
$this->_headerString .= 'Content-Disposition: attachment; filename="' . $file . '"' . PHP_EOL . PHP_EOL;
$this->_headerString .= $content . PHP_EOL . PHP_EOL;
$this->_headerString .= '--' . $boundary . '--';
}
}
/* collect from output */
$this->_headerString .= 'From: ' . $this->_fromString . PHP_EOL;
$this->_headerString .= 'Reply-To: ' . $this->_fromString . PHP_EOL;
$this->_headerString .= 'Return-Path: ' . $this->_fromString . PHP_EOL;
}