Swift_Mime_Headers_AbstractHeader::_tokensToString PHP 메소드

    private function _tokensToString(array $tokens)
    {
        $lineCount = 0;
        $headerLines = array();
        $headerLines[] = $this->_name . ': ';
        $currentLine =& $headerLines[$lineCount++];
        // Build all tokens back into compliant header
        foreach ($tokens as $i => $token) {
            // Line longer than specified maximum or token was just a new line
            if ("\r\n" == $token || $i > 0 && strlen($currentLine . $token) > $this->_lineLength && 0 < strlen($currentLine)) {
                $headerLines[] = '';
                $currentLine =& $headerLines[$lineCount++];
            }
            // Append token to the line
            if ("\r\n" != $token) {
                $currentLine .= $token;
            }
        }
        // Implode with FWS (RFC 2822, 2.2.3)
        return implode("\r\n", $headerLines) . "\r\n";
    }