はじめに

$config['encryption_key'] = 'samplekey';   // ★
// ～
$config['sess_cookie_name']		= 'ci_session';
$config['sess_expiration']		= 7200;
$config['sess_expire_on_close']	= FALSE;
$config['sess_encrypt_cookie']	= FALSE;
$config['sess_use_database']	= TRUE;   // ★
$config['sess_table_name']		= 'ci_sessions';
$config['sess_match_ip']		= FALSE;
$config['sess_match_useragent']	= TRUE;
$config['sess_time_to_update']	= 300;

$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'usr1';
$db['default']['password'] = 'pwd1';
$db['default']['database'] = 'ci';
$db['default']['dbdriver'] = 'postgre';

var	$protocol		= "smtp";	// mail/sendmail/smtp
var	$smtp_host		= "smtp.s-proj.com";		// SMTP Server.  Example: mail.earthlink.net
var	$smtp_user		= "user@s-proj.com";		// SMTP Username
var	$smtp_pass		= "pwd";		// SMTP Password
var	$smtp_port		= "25";		// SMTP Port

Welcome to Your project,

Thanks for joining Your project. We listed your sign in details below, make
sure you keep them safe.
To verify your email address, please follow this link:

http://localhost/ci/index.php/auth/activate/1/41b9fccc4c4c63726b1357166d00e060

Please verify your email within 48 hours, otherwise your registration will
become invalid and you will have to register again.

Your username: xxxx
Your email address: xxxx@s-proj.com

Have fun!
The Your project Team

$db['default']['dbdriver'] = 'postgre';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'SJIS';  // ★

	function db_set_charset($charset, $collation)
	{
		// @todo - add support if needed
		return @pg_exec($this->conn_id, "SET client_encoding TO '".$this->escape_str($charset)."'");  // ★　修正後
//		return TRUE;  修正前
	}

$config['mailtype'] = 'txt';  // ★ここはテキストベースのメールがhtmlベースのメールかを指定します。
$config['charset'] = 'iso-2022-jp';  // ★
$config['newline'] = '\r\n';

function subject($subject)
    {
//   ★     $subject = $this->_prep_q_encoding($subject);
        $this->_set_header('Subject', $subject);
    }

    function _send_email($type, $email, &$data)
    {

        $this->load->library('email');
// 修正前
//		$this->email->from($this->config->item('webmaster_email', 'tank_auth'), $this->config->item('website_name', 'tank_auth'));
//		$this->email->reply_to($this->config->item('webmaster_email', 'tank_auth'), $this->config->item('website_name', 'tank_auth'));
//		$this->email->to($email);
//		$this->email->subject(sprintf($this->lang->line('auth_subject_'.$type), $this->config->item('website_name', 'tank_auth')));
//		$this->email->message($this->load->view('email/'.$type.'-html', $data, TRUE));
//		$this->email->set_alt_message($this->load->view('email/'.$type.'-txt', $data, TRUE));

// ★修正後
        $from_name = mb_encode_mimeheader($this->config->item('website_name', 'tank_auth'), "ISO-2022-JP","SJIS");
        $subject = mb_convert_encoding(sprintf($this->lang->line('auth_subject_'.$type), $this->config->item('website_name', 'tank_auth')), "ISO-2022-JP", "SJIS");
		// 2)の多言語化対応のため、languageの指定により参照するディレクトリが変わるようにしています。
        $message = mb_convert_encoding($this->load->view('email/language/'.$this->config->item('language')."/".$type.'-txt', $data, TRUE), "ISO-2022-JP", "SJIS");
		// 2)の多言語化対応のため、languageの指定により参照するディレクトリを変わるようにしています。
        $alt_message = mb_convert_encoding($this->load->view('email/language/'.$this->config->item('language')."/".$type.'-txt', $data, TRUE), "ISO-2022-JP", "SJIS");
        $this->email->from($this->config->item('webmaster_email', 'tank_auth'), $from_name);
        $this->email->reply_to($this->config->item('webmaster_email', 'tank_auth'), $from_name);
        $this->email->to($email);
        $this->email->subject($subject);
        $this->email->message($message);
        $this->email->set_alt_message($alt_message);

        $this->email->send();
    }

// Email subjects　修正前
//$lang['auth_subject_welcome'] = 'ようこそ %s さん!';
//$lang['auth_subject_activate'] = 'ようこそ %s さん!';
//$lang['auth_subject_forgot_password'] = ' %s のパスワードをお忘れですか?';
//$lang['auth_subject_reset_password'] = '%s の新らしいパスワード';
//$lang['auth_subject_change_email'] = '%s の新しいメールアドレス';
// Email subjects　★修正後
$lang['auth_subject_welcome'] = '%s へようこそ！';
$lang['auth_subject_activate'] = '%s へようこそ！';
$lang['auth_subject_forgot_password'] = ' %s のパスワードをお忘れですか?';
$lang['auth_subject_reset_password'] = '%s のパスワードを変更しました';
$lang['auth_subject_change_email'] = '%s の登録メールアドレスを変更しました';