Send a Email for Jap

Email.php

<?php
class Email {
  /*
   * This method send a mail for Japanese.
   * (charaset of the email is 'ISO-2022-JP')
   *
   *  Parameters
   *    to:           sending email's TO
   *    cc:           sending email's CC
   *    bcc:          sending email's BCC
   *    subject:      sending email's subject
   *    body:         sending email's body
   *    from_email:   sending email's From and Reply-To
   *    from_name:    sending email's From and Reply-To
   *    attach_files: sending email's attach files.
   *                  This parameter is Array type, so you can set multiple files.
   *
   *  Return
   *    The result of sending as TRUE or FALSE.
   */
  public static function send_jp_mail( $params = array() ) {
    $to = ( array_key_exists('to', $params) ? $params['to'] : null);
    $cc = ( array_key_exists('cc', $params) ? $params['cc'] : null);
    $bcc = ( array_key_exists('bcc', $params) ? $params['bcc'] : null);
    $subject = ( array_key_exists('subject', $params) ? $params['subject'] : null);
    $body = ( array_key_exists('body', $params) ? $params['body'] : null);
    $from_email = ( array_key_exists('from_email', $params) ? $params['from_email'] : null);
    $from_name = ( array_key_exists('from_name', $params) ? $params['from_name'] : null);
    $attach_files = ( array_key_exists('attach_files', $params) ? $params['attach_files'] : array());
    $boundary = null;
    $has_attachment = is_array($attach_files) && count($attach_files) > 0;
    if ($has_attachment) {
      $boundary = md5(uniqid(rand(), true));
    }

    $headers  = "MIME-Version: 1.0 \n" ;
    $headers .= "From: " .
                "".mb_encode_mimeheader (mb_convert_encoding($from_name,"ISO-2022-JP","AUTO")) ."" .
                "<".$from_email."> \n";
    $headers .= "Reply-To: " .
                "".mb_encode_mimeheader (mb_convert_encoding($from_name,"ISO-2022-JP","AUTO")) ."" .
                "<".$from_email."> \n";
    $headers .= "Cc: ".$cc."\n";
    $headers .= "Bcc: ".$bcc."\n";
    if ($has_attachment) {
      $headers .= "Content-Type: multipart/mixed; boundary=\"$boundary\"\n";
    } else {
      $headers .= "Content-Type: text/plain;charset=ISO-2022-JP \n";
    }
    $headers .= "Content-Transfer-Encoding: 7bit";


    /* Convert body to same encoding as stated
    in Content-Type header above */

    if ($has_attachment) {
      $r_body = $body;
      $body = "--$boundary\n";
      $body .= "Content-Type: text/plain; charset=\"iso-2022-jp\"\n";
      $body .= "Content-Transfer-Encoding: 7bit\n";
      $body .= "\n";
      $body .= mb_convert_encoding($r_body, "ISO-2022-JP","AUTO")."\n";

      foreach ($attach_files as $file) {
        if (!file_exists($file)) {
          continue;
        }
        $filename = basename($file);
        $body .= "\n";
        $body .= "--$boundary\n";
        $body .= "Content-Type: application/octet-stream; name=\"$filename\"\n";
        $body .= "Content-Disposition: attachment; filename=\"$filename\"\n";
        $body .= "Content-Transfer-Encoding: base64\n";
        $body .= "\n";
        $body .= chunk_split(base64_encode(file_get_contents($file)))."\n";
      }
      $body .= '--'.$boundary.'--';
    } else {
      $body = mb_convert_encoding($body, "ISO-2022-JP","AUTO");
    }

    /* Mail, optional paramiters. */
    $sendmail_params  = "-f$from_email";

    mb_language("ja");
    $subject = mb_convert_encoding($subject, "ISO-2022-JP","AUTO");
    $subject = mb_encode_mimeheader($subject);

    $result = mail($to, $subject, $body, $headers, $sendmail_params);
    return $result;
  }
}