Swift_Encoder::encodeString PHP Méthode

    public function encodeString($string, $firstLineOffset = 0, $maxLineLength = 0);

  /**
   * Get a token as an encoded word for safe insertion into headers.
   * @param string $token to encode
   * @param int $firstLineOffset, optional
   * @return string
   */
  protected function getTokenAsEncodedWord($token, $firstLineOffset = 0)
  {
    //Adjust $firstLineOffset to account for space needed for syntax
    $charsetDecl = $this->_charset;
    if (isset($this->_lang))
    {
      $charsetDecl .= '*' . $this->_lang;
    }
    $encodingWrapperLength = strlen(
      '=?' . $charsetDecl . '?' . $this->_encoder->getName() . '??='
      );

    if ($firstLineOffset >= 75) //Does this logic need to be here?
    {
      $firstLineOffset = 0;
    }

    $encodedTextLines = explode("\r\n",
      $this->_encoder->encodeString(
        $token, $firstLineOffset, 75 - $encodingWrapperLength
        )
      );

    foreach ($encodedTextLines as $lineNum => $line)
    {
      $encodedTextLines[$lineNum] = '=?' . $charsetDecl .
        '?' . $this->_encoder->getName() .
        '?' . $line . '?=';
    }

    return implode("\r\n ", $encodedTextLines);
  }