codigniter email class modified to support automatic unsubscribe link

2014-03-04T05:36:00.003-08:00

<?php
$senderemail = 'newsletter@mailing.domain.com';
// Who is sending the newsletter?
$newslettername = 'My newsletter';
// What is the name of your newsletter?
$email = "reciever@email.com";
// Who is receiving the newsletter?
$config['mailtype'] = 'html';
$config['protocol'] = 'smtp';
$config['domain'] = substr($senderemail, strpos($senderemail, '@') + 1, strlen($senderemail));
// take the domain name part from the "from email", but you can enter here any domain name you want.
$config['smtp_host'] = 'smtp-out.provider.com';
$config['charset'] = 'utf-8';
$this->email->initialize($config);
$this->email->from($senderemail, $newslettername);
$this->email->message('newsletter content...');
$this->email->to($email, 'http://www.domain.com/unsubscribe/'.$email);
// you probaly should encode the url component...
$this->email->subject($res->titel);
$this->email->print_debugger();
$this->email->send();
<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* @package  CodeIgniter
* @author  ExpressionEngine Dev Team
* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
* @license  http://codeigniter.com/user_guide/license.html
* @link  http://codeigniter.com
* @since  Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* CodeIgniter Email Class
*
* Permits email to be sent using Mail, Sendmail, or SMTP.
*
* @package  CodeIgniter
* @subpackage Libraries
* @category Libraries
* @author  ExpressionEngine Dev Team
* @link  http://codeigniter.com/user_guide/libraries/email.html
*/
class CI_Email {
    var $unsubscribe_url = '';
    var $domain = '';
    var $useragent = "CodeIgniter";
    var $mailpath = "/usr/sbin/sendmail";
    // Sendmail path
    var $protocol = "mail";
    // mail/sendmail/smtp
    var $smtp_host = "";
    // SMTP Server.  Example: mail.earthlink.net
    var $smtp_user = "";
    // SMTP Username
    var $smtp_pass = "";
    // SMTP Password
    var $smtp_port = "25";
    // SMTP Port
    var $smtp_timeout = 5;
    // SMTP Timeout in seconds
    var $smtp_crypto = "";
    // SMTP Encryption. Can be null, tls or ssl.
    var $wordwrap = TRUE;
    // TRUE/FALSE  Turns word-wrap on/off
    var $wrapchars = "76";
    // Number of characters to wrap at.
    var $mailtype = "text";
    // text/html  Defines email formatting
    var $charset = "utf-8";
    // Default char set: iso-8859-1 or us-ascii
    var $multipart = "mixed";
    // "mixed" (in the body) or "related" (separate)
    var $alt_message = '';
    // Alternative message for HTML emails
    var $validate = FALSE;
    // TRUE/FALSE.  Enables email validation
    var $priority = "3";
    // Default priority (1 - 5)
    var $newline = "\n";
    // Default newline. "\r\n" or "\n" (Use "\r\n" to comply with RFC 822)
    var $crlf = "\n";
    // The RFC 2045 compliant CRLF for quoted-printable is "\r\n".  Apparently some servers,
    // even on the receiving end think they need to muck with CRLFs, so using "\n", while
    // distasteful, is the only thing that seems to work for all environments.
    var $send_multipart = TRUE;
    // TRUE/FALSE - Yahoo does not like multipart alternative, so this is an override.  Set to FALSE for Yahoo.
    var $bcc_batch_mode = FALSE;
    // TRUE/FALSE  Turns on/off Bcc batch feature
    var $bcc_batch_size = 200;
    // If bcc_batch_mode = TRUE, sets max number of Bccs in each batch
    var $_safe_mode = FALSE;
    var $_subject = "";
    var $_body = "";
    var $_finalbody = "";
    var $_alt_boundary = "";
    var $_atc_boundary = "";
    var $_header_str = "";
    var $_smtp_connect = "";
    var $_encoding = "8bit";
    var $_IP = FALSE;
    var $_smtp_auth = FALSE;
    var $_replyto_flag = FALSE;
    var $_debug_msg = array();
    var $_recipients = array();
    var $_cc_array = array();
    var $_bcc_array = array();
    var $_headers = array();
    var $_attach_name = array();
    var $_attach_type = array();
    var $_attach_disp = array();
    var $_protocols = array('mail', 'sendmail', 'smtp');
    var $_base_charsets = array('us-ascii', 'iso-2022-');
    // 7-bit charsets (excluding language suffix)
    var $_bit_depths = array('7bit', '8bit');
    var $_priorities = array('1 (Highest)', '2 (High)', '3 (Normal)', '4 (Low)', '5 (Lowest)');
    /**
    * Constructor - Sets Email Preferences
    *
    * The constructor can be passed an array of config values
    */
    public function __construct($config = array())
    {
        if (count($config) > 0)
        {
            $this->initialize($config);
        }
        else
        {
            $this->_smtp_auth = ($this->smtp_user == '' AND $this->smtp_pass == '') ? FALSE : TRUE;
            $this->_safe_mode = ((boolean)@ini_get("safe_mode") === FALSE) ? FALSE : TRUE;
        }
        log_message('debug', "Email Class Initialized");
    }
    // --------------------------------------------------------------------
    /**
    * Initialize preferences
    *
    * @access public
    * @param array
    * @return void
    */
    public function initialize($config = array())
    {
        foreach ($config as $key => $val)
        {
            if (isset($this->$key))
            {
                $method = 'set_'.$key;
                if (method_exists($this, $method))
                {
                    $this->$method($val);
                }
                else
                {
                    $this->$key = $val;
                }
            }
        }
        $this->clear();
        $this->_smtp_auth = ($this->smtp_user == '' AND $this->smtp_pass == '') ? FALSE : TRUE;
        $this->_safe_mode = ((boolean)@ini_get("safe_mode") === FALSE) ? FALSE : TRUE;
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Initialize the Email Data
    *
    * @access public
    * @return void
    */
    public function clear($clear_attachments = FALSE)
    {
        $this->_subject = "";
        $this->_body = "";
        $this->_finalbody = "";
        $this->_header_str = "";
        $this->_replyto_flag = FALSE;
        $this->_recipients = array();
        $this->_cc_array = array();
        $this->_bcc_array = array();
        $this->_headers = array();
        $this->_debug_msg = array();
        $this->_set_header('User-Agent', $this->useragent);
        $this->_set_header('Date', $this->_set_date());
        if ($clear_attachments !== FALSE)
        {
            $this->_attach_name = array();
            $this->_attach_type = array();
            $this->_attach_disp = array();
        }
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set FROM
    *
    * @access public
    * @param string
    * @param string
    * @return void
    */
    public function from($from, $name = '')
    {
        if (preg_match( '/\<(.*)\>/', $from, $match))
        {
            $from = $match['1'];
        }
        if ($this->validate)
        {
            $this->validate_email($this->_str_to_array($from));
        }
        // prepare the display name
        if ($name != '')
        {
            // only use Q encoding if there are characters that would require it
            if ( ! preg_match('/[\200-\377]/', $name))
            {
                // add slashes for non-printing characters, slashes, and double quotes, and surround it in double quotes
                $name = '"'.addcslashes($name, "\0..\37\177'\"\\").'"';
            }
            else
            {
                $name = $this->_prep_q_encoding($name, TRUE);
            }
        }
        $this->_set_header('From', $name.' <'.$from.'>');
        $this->_set_header('Return-Path', '<'.$from.'>');
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set Reply - to
    *
    * @access public
    * @param string
    * @param string
    * @return void
    */
    public function reply_to($replyto, $name = '')
    {
        if (preg_match( '/\<(.*)\>/', $replyto, $match))
        {
            $replyto = $match['1'];
        }
        if ($this->validate)
        {
            $this->validate_email($this->_str_to_array($replyto));
        }
        if ($name == '')
        {
            $name = $replyto;
        }
        if (strncmp($name, '"', 1) != 0)
        {
            $name = '"'.$name.'"';
        }
        $this->_set_header('Reply-To', $name.' <'.$replyto.'>');
        $this->_replyto_flag = TRUE;
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set Recipients
    *
    * @access public
    * @param string
    * @return void
    */
    public function to($to, $unsub = null)
    {
        if($unsub !== null)
        {
            $this->unsubscribe_url = $unsub;
        }
        $to = $this->_str_to_array($to);
        $to = $this->clean_email($to);
        if ($this->validate)
        {
            $this->validate_email($to);
        }
        if ($this->_get_protocol() != 'mail')
        {
            $this->_set_header('To', implode(", ", $to));
        }
        switch ($this->_get_protocol())
        {
            case 'smtp'  :
            $this->_recipients = $to;
            break;
            case 'sendmail' :
            case 'mail'  :
            $this->_recipients = implode(", ", $to);
            break;
        }
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set CC
    *
    * @access public
    * @param string
    * @return void
    */
    public function cc($cc)
    {
        $cc = $this->_str_to_array($cc);
        $cc = $this->clean_email($cc);
        if ($this->validate)
        {
            $this->validate_email($cc);
        }
        $this->_set_header('Cc', implode(", ", $cc));
        if ($this->_get_protocol() == "smtp")
        {
            $this->_cc_array = $cc;
        }
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set BCC
    *
    * @access public
    * @param string
    * @param string
    * @return void
    */
    public function bcc($bcc, $limit = '')
    {
        if ($limit != '' && is_numeric($limit))
        {
            $this->bcc_batch_mode = TRUE;
            $this->bcc_batch_size = $limit;
        }
        $bcc = $this->_str_to_array($bcc);
        $bcc = $this->clean_email($bcc);
        if ($this->validate)
        {
            $this->validate_email($bcc);
        }
        if (($this->_get_protocol() == "smtp") OR ($this->bcc_batch_mode && count($bcc) > $this->bcc_batch_size))
        {
            $this->_bcc_array = $bcc;
        }
        else
        {
            $this->_set_header('Bcc', implode(", ", $bcc));
        }
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set Email Subject
    *
    * @access public
    * @param string
    * @return void
    */
    public function subject($subject)
    {
        $subject = $this->_prep_q_encoding($subject);
        $this->_set_header('Subject', $subject);
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set Body
    *
    * @access public
    * @param string
    * @return void
    */
    public function message($body)
    {
        $this->_body = rtrim(str_replace("\r", "", $body));
        /* strip slashes only if magic quotes is ON
        if we do it with magic quotes OFF, it strips real, user - inputted chars.
        NOTE: In PHP 5.4 get_magic_quotes_gpc() will always return 0 and
        it will probably not exist in future versions at all.
        */
        if ( ! is_php('5.4') && get_magic_quotes_gpc())
        {
            $this->_body = stripslashes($this->_body);
        }
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Assign file attachments
    *
    * @access public
    * @param string
    * @return void
    */
    public function attach($filename, $disposition = 'attachment')
    {
        $this->_attach_name[] = $filename;
        $this->_attach_type[] = $this->_mime_types(pathinfo($filename, PATHINFO_EXTENSION));
        $this->_attach_disp[] = $disposition;
        // Can also be 'inline'  Not sure if it matters
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Add a Header Item
    *
    * @access protected
    * @param string
    * @param string
    * @return void
    */
    protected function _set_header($header, $value)
    {
        $this->_headers[$header] = $value;
    }
    // --------------------------------------------------------------------
    /**
    * Convert a String to an Array
    *
    * @access protected
    * @param string
    * @return array
    */
    protected function _str_to_array($email)
    {
        if ( ! is_array($email))
        {
            if (strpos($email, ',') !== FALSE)
            {
                $email = preg_split('/[\s,]/', $email, - 1, PREG_SPLIT_NO_EMPTY);
            }
            else
            {
                $email = trim($email);
                settype($email, "array");
            }
        }
        return $email;
    }
    // --------------------------------------------------------------------
    /**
    * Set Multipart Value
    *
    * @access public
    * @param string
    * @return void
    */
    public function set_alt_message($str = '')
    {
        $this->alt_message = $str;
        return $this;
    }
    public function set_from($domain = '')
    {
        $this->domain = $domain;
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set Mailtype
    *
    * @access public
    * @param string
    * @return void
    */
    public function set_mailtype($type = 'text')
    {
        $this->mailtype = ($type == 'html') ? 'html' : 'text';
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set Wordwrap
    *
    * @access public
    * @param string
    * @return void
    */
    public function set_wordwrap($wordwrap = TRUE)
    {
        $this->wordwrap = ($wordwrap === FALSE) ? FALSE : TRUE;
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set Protocol
    *
    * @access public
    * @param string
    * @return void
    */
    public function set_protocol($protocol = 'mail')
    {
        $this->protocol = ( ! in_array($protocol, $this->_protocols, TRUE)) ? 'mail' : strtolower($protocol);
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set Priority
    *
    * @access public
    * @param integer
    * @return void
    */
    public function set_priority($n = 3)
    {
        if ( ! is_numeric($n))
        {
            $this->priority = 3;
            return;
        }
        if ($n < 1 OR $n > 5)
        {
            $this->priority = 3;
            return;
        }
        $this->priority = $n;
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set Newline Character
    *
    * @access public
    * @param string
    * @return void
    */
    public function set_newline($newline = "\n")
    {
        if ($newline != "\n" AND $newline != "\r\n" AND $newline != "\r")
        {
            $this->newline = "\n";
            return;
        }
        $this->newline = $newline;
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set CRLF
    *
    * @access public
    * @param string
    * @return void
    */
    public function set_crlf($crlf = "\n")
    {
        if ($crlf != "\n" AND $crlf != "\r\n" AND $crlf != "\r")
        {
            $this->crlf = "\n";
            return;
        }
        $this->crlf = $crlf;
        return $this;
    }
    // --------------------------------------------------------------------
    /**
    * Set Message Boundary
    *
    * @access protected
    * @return void
    */
    protected function _set_boundaries()
    {
        $this->_alt_boundary = "B_ALT_".uniqid('');
        // multipart/alternative
        $this->_atc_boundary = "B_ATC_".uniqid('');
        // attachment boundary
    }
    // --------------------------------------------------------------------
    /**
    * Get the Message ID
    *
    * @access protected
    * @return string
    */
    protected function _get_message_id()
    {
        $from = $this->_headers['Return-Path'];
        $from = str_replace(">", "", $from);
        $from = str_replace("<", "", $from);
        return  "<".uniqid('').strstr($from, '@').">";
    }
    // --------------------------------------------------------------------
    /**
    * Get Mail Protocol
    *
    * @access protected
    * @param bool
    * @return string
    */
    protected function _get_protocol($return = TRUE)
    {
        $this->protocol = strtolower($this->protocol);
        $this->protocol = ( ! in_array($this->protocol, $this->_protocols, TRUE)) ? 'mail' : $this->protocol;
        if ($return == TRUE)
        {
            return $this->protocol;
        }
    }
    // --------------------------------------------------------------------
    /**
    * Get Mail Encoding
    *
    * @access protected
    * @param bool
    * @return string
    */
    protected function _get_encoding($return = TRUE)
    {
        $this->_encoding = ( ! in_array($this->_encoding, $this->_bit_depths)) ? '8bit' : $this->_encoding;
        foreach ($this->_base_charsets as $charset)
        {
            if (strncmp($charset, $this->charset, strlen($charset)) == 0)
            {
                $this->_encoding = '7bit';
            }
        }
        if ($return == TRUE)
        {
            return $this->_encoding;
        }
    }
    // --------------------------------------------------------------------
    /**
    * Get content type (text/html/attachment)
    *
    * @access protected
    * @return string
    */
    protected function _get_content_type()
    {
        if ($this->mailtype == 'html' &&  count($this->_attach_name) == 0)
        {
            return 'html';
        }
        elseif ($this->mailtype == 'html' &&  count($this->_attach_name)  > 0)
        {
            return 'html-attach';
        }
        elseif ($this->mailtype == 'text' &&  count($this->_attach_name)  > 0)
        {
            return 'plain-attach';
        }
        else
        {
            return 'plain';
        }
    }
    // --------------------------------------------------------------------
    /**
    * Set RFC 822 Date
    *
    * @access protected
    * @return string
    */
    protected function _set_date()
    {
        $timezone = date("Z");
        $operator = (strncmp($timezone, '-', 1) == 0) ? '-' : '+';
        $timezone = abs($timezone);
        $timezone = floor($timezone/3600) * 100 + ($timezone % 3600 ) / 60;
        return sprintf("%s %s%04d", date("D, j M Y H:i:s"), $operator, $timezone);
    }
    // --------------------------------------------------------------------
    /**
    * Mime message
    *
    * @access protected
    * @return string
    */
    protected function _get_mime_message()
    {
        return "This is a multi-part message in MIME format.".$this->newline."Your email application may not support this format.";
    }
    // --------------------------------------------------------------------
    /**
    * Validate Email Address
    *
    * @access public
    * @param string
    * @return bool
    */
    public function validate_email($email)
    {
        if ( ! is_array($email))
        {
            $this->_set_error_message('lang:email_must_be_array');
            return FALSE;
        }
        foreach ($email as $val)
        {
            if ( ! $this->valid_email($val))
            {
                $this->_set_error_message('lang:email_invalid_address', $val);
                return FALSE;
            }
        }
        return TRUE;
    }
    // --------------------------------------------------------------------
    /**
    * Email Validation
    *
    * @access public
    * @param string
    * @return bool
    */
    public function valid_email($address)
    {
        return ( ! preg_match("/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $address)) ? FALSE : TRUE;
    }
    // --------------------------------------------------------------------
    /**
    * Clean Extended Email Address: Joe Smith <joe@smith.com>
    *
    * @access public
    * @param string
    * @return string
    */
    public function clean_email($email)
    {
        if ( ! is_array($email))
        {
            if (preg_match('/\<(.*)\>/', $email, $match))
            {
                return $match['1'];
            }
            else
            {
                return $email;
            }
        }
        $clean_email = array();
        foreach ($email as $addy)
        {
            if (preg_match( '/\<(.*)\>/', $addy, $match))
            {
                $clean_email[] = $match['1'];
            }
            else
            {
                $clean_email[] = $addy;
            }
        }
        return $clean_email;
    }
    // --------------------------------------------------------------------
    /**
    * Build alternative plain text message
    *
    * This public function provides the raw message for use
    * in plain - text headers of HTML - formatted emails.
    * If the user hasn't specified his own alternative message
  * it creates one by stripping the HTML
  *
  * @access protected
  * @return string
   */
 protected function _get_alt_message()
 {
  if ($this->alt_message != "")
  {
   return $this->word_wrap($this->alt_message, '76');
  }

  if (preg_match('/\<body.*?\>(.*)\<\/body\>/si', $this->_body, $match))
  {
   $body = $match['1'];
  }
  else
  {
   $body = $this->_body;
  }

  $body = trim(strip_tags($body));
  $body = preg_replace( '#<! - -(.*) - -\>#', "", $body);
  $body = str_replace("\t", "", $body);

  for ($i = 20; $i >= 3; $i--)
  {
   $n = "";

   for ($x = 1; $x <= $i; $x ++)
   {
    $n .= "\n";
   }

   $body = str_replace($n, "\n\n", $body);
  }

  return $this->word_wrap($body, '76');
 }

 // --------------------------------------------------------------------

 /**
  * Word Wrap
  *
  * @access public
  * @param string
  * @param integer
  * @return string
   */
 public function word_wrap($str, $charlim = '')
 {
  // Se the character limit

  if ($charlim == '')
  {
   $charlim = ($this->wrapchars == "") ? "76" : $this->wrapchars;
  }

  // Reduce multiple spaces

  $str = preg_replace("| +|", " ", $str);

  // Standardize newlines

  if (strpos($str, "\r") !== FALSE)
  {
   $str = str_replace(array("\r\n", "\r"), "\n", $str);
  }

  // If the current word is surrounded by {unwrap} tags we'll
    // strip the entire chunk and replace it with a marker.
    $unwrap = array();
    if (preg_match_all("|(\{unwrap\}.+?\{/unwrap\})|s", $str, $matches))
    {
        for ($i = 0; $i < count($matches['0']); $i +  + )
        {
            $unwrap[] = $matches['1'][$i];
            $str = str_replace($matches['1'][$i], "{{unwrapped".$i."}}", $str);
        }
    }
    // Use PHP's native public function to do the initial wordwrap.
    // We set the cut flag to FALSE so that any individual words that are
    // too long get left alone.  In the next step we'll deal with them.
    $str = wordwrap($str, $charlim, "\n", FALSE);
    // Split the string into individual lines of text and cycle through them
    $output = "";
    foreach (explode("\n", $str) as $line)
    {
        // Is the line within the allowed character count?
        // If so we'll join it to the output and continue
        if (strlen($line) <= $charlim)
        {
            $output . = $line.$this->newline;
            continue;
        }
        $temp = '';
        while ((strlen($line)) > $charlim)
        {
            // If the over-length word is a URL we won't wrap it
            if (preg_match("!\[url.+\]|://|wwww.!", $line))
            {
                break;
            }
            // Trim the word down
            $temp . = substr($line, 0, $charlim - 1);
            $line = substr($line, $charlim - 1);
        }
        // If $temp contains data it means we had to split up an over-length
        // word into smaller chunks so we'll add it back to our current line
        if ($temp != '')
        {
            $output . = $temp.$this->newline.$line;
        }
        else
        {
            $output . = $line;
        }
        $output . = $this->newline;
    }
    // Put our markers back
    if (count($unwrap) > 0)
    {
        foreach ($unwrap as $key => $val)
        {
            $output = str_replace("{{unwrapped".$key."}}", $val, $output);
        }
    }
    return $output;
}
// --------------------------------------------------------------------
/**
* Build final headers
*
* @access protected
* @param string
* @return string
*/
protected function _build_headers()
{
    $this->_set_header('X-Sender', $this->clean_email($this->_headers['From']));
    $this->_set_header('X-Mailer', $this->useragent);
    $this->_set_header('X-Priority', $this->_priorities[$this->priority - 1]);
    $this->_set_header('Message-ID', $this->_get_message_id());
    $this->_set_header('Mime-Version', '1.0');
    if(!empty($this->unsubscribe_url)) $this->_set_header('List-Unsubscribe', '<'.$this->unsubscribe_url.'>');
}
// --------------------------------------------------------------------
/**
* Write Headers as a string
*
* @access protected
* @return void
*/
protected function _write_headers()
{
    if ($this->protocol == 'mail')
    {
        $this->_subject = $this->_headers['Subject'];
        unset($this->_headers['Subject']);
    }
    reset($this->_headers);
    $this->_header_str = "";
    foreach ($this->_headers as $key => $val)
    {
        $val = trim($val);
        if ($val != "")
        {
            $this->_header_str . = $key.": ".$val.$this->newline;
        }
    }
    if ($this->_get_protocol() == 'mail')
    {
        $this->_header_str = rtrim($this->_header_str);
    }
}
// --------------------------------------------------------------------
/**
* Build Final Body and attachments
*
* @access protected
* @return void
*/
protected function _build_message()
{
    if ($this->wordwrap === TRUE  AND  $this->mailtype != 'html')
    {
        $this->_body = $this->word_wrap($this->_body);
    }
    $this->_set_boundaries();
    $this->_write_headers();
    $hdr = ($this->_get_protocol() == 'mail') ? $this->newline : '';
    $body = '';
    switch ($this->_get_content_type())
    {
        case 'plain' :
        $hdr . = "Content-Type: text/plain; charset=" . $this->charset . $this->newline;
        $hdr . = "Content-Transfer-Encoding: " . $this->_get_encoding();
        if ($this->_get_protocol() == 'mail')
        {
            $this->_header_str . = $hdr;
            $this->_finalbody = $this->_body;
        }
        else
        {
            $this->_finalbody = $hdr . $this->newline . $this->newline . $this->_body;
        }
        return;
        break;
        case 'html' :
        if ($this->send_multipart === FALSE)
        {
            $hdr . = "Content-Type: text/html; charset=" . $this->charset . $this->newline;
            $hdr . = "Content-Transfer-Encoding: quoted-printable";
        }
        else
        {
            $hdr . = "Content-Type: multipart/alternative; boundary=\"" . $this->_alt_boundary . "\"" . $this->newline . $this->newline;
            $body . = $this->_get_mime_message() . $this->newline . $this->newline;
            $body . = "--" . $this->_alt_boundary . $this->newline;
            $body . = "Content-Type: text/plain; charset=" . $this->charset . $this->newline;
            $body . = "Content-Transfer-Encoding: " . $this->_get_encoding() . $this->newline . $this->newline;
            $body . = $this->_get_alt_message() . $this->newline . $this->newline . "--" . $this->_alt_boundary . $this->newline;
            $body . = "Content-Type: text/html; charset=" . $this->charset . $this->newline;
            $body . = "Content-Transfer-Encoding: quoted-printable" . $this->newline . $this->newline;
        }
        $this->_finalbody = $body . $this->_prep_quoted_printable($this->_body) . $this->newline . $this->newline;
        if ($this->_get_protocol() == 'mail')
        {
            $this->_header_str . = $hdr;
        }
        else
        {
            $this->_finalbody = $hdr . $this->_finalbody;
        }
        if ($this->send_multipart !== FALSE)
        {
            $this->_finalbody . = "--" . $this->_alt_boundary . "--";
        }
        return;
        break;
        case 'plain-attach' :
        $hdr . = "Content-Type: multipart/".$this->multipart."; boundary=\"" . $this->_atc_boundary."\"" . $this->newline . $this->newline;
        if ($this->_get_protocol() == 'mail')
        {
            $this->_header_str . = $hdr;
        }
        $body . = $this->_get_mime_message() . $this->newline . $this->newline;
        $body . = "--" . $this->_atc_boundary . $this->newline;
        $body . = "Content-Type: text/plain; charset=" . $this->charset . $this->newline;
        $body . = "Content-Transfer-Encoding: " . $this->_get_encoding() . $this->newline . $this->newline;
        $body . = $this->_body . $this->newline . $this->newline;
        break;
        case 'html-attach' :
        $hdr . = "Content-Type: multipart/".$this->multipart."; boundary=\"" . $this->_atc_boundary."\"" . $this->newline . $this->newline;
        if ($this->_get_protocol() == 'mail')
        {
            $this->_header_str . = $hdr;
        }
        $body . = $this->_get_mime_message() . $this->newline . $this->newline;
        $body . = "--" . $this->_atc_boundary . $this->newline;
        $body . = "Content-Type: multipart/alternative; boundary=\"" . $this->_alt_boundary . "\"" . $this->newline .$this->newline;
        $body . = "--" . $this->_alt_boundary . $this->newline;
        $body . = "Content-Type: text/plain; charset=" . $this->charset . $this->newline;
        $body . = "Content-Transfer-Encoding: " . $this->_get_encoding() . $this->newline . $this->newline;
        $body . = $this->_get_alt_message() . $this->newline . $this->newline . "--" . $this->_alt_boundary . $this->newline;
        $body . = "Content-Type: text/html; charset=" . $this->charset . $this->newline;
        $body . = "Content-Transfer-Encoding: quoted-printable" . $this->newline . $this->newline;
        $body . = $this->_prep_quoted_printable($this->_body) . $this->newline . $this->newline;
        $body . = "--" . $this->_alt_boundary . "--" . $this->newline . $this->newline;
        break;
    }
    $attachment = array();
    $z = 0;
    for ($i = 0; $i < count($this->_attach_name); $i +  + )
    {
        $filename = $this->_attach_name[$i];
        $basename = basename($filename);
        $ctype = $this->_attach_type[$i];
        if ( ! file_exists($filename))
        {
            $this->_set_error_message('lang:email_attachment_missing', $filename);
            return FALSE;
        }
        $h = "--".$this->_atc_boundary.$this->newline;
        $h . = "Content-type: ".$ctype."; ";
        $h . = "name=\"".$basename."\"".$this->newline;
        $h . = "Content-Disposition: ".$this->_attach_disp[$i].";".$this->newline;
        $h . = "Content-Transfer-Encoding: base64".$this->newline;
        $attachment[$z +  + ] = $h;
        $file = filesize($filename) + 1;
        if ( ! $fp = fopen($filename, FOPEN_READ))
        {
            $this->_set_error_message('lang:email_attachment_unreadable', $filename);
            return FALSE;
        }
        $attachment[$z +  + ] = chunk_split(base64_encode(fread($fp, $file)));
        fclose($fp);
    }
    $body . = implode($this->newline, $attachment).$this->newline."--".$this->_atc_boundary."--";
    if ($this->_get_protocol() == 'mail')
    {
        $this->_finalbody = $body;
    }
    else
    {
        $this->_finalbody = $hdr . $body;
    }
    return;
}
// --------------------------------------------------------------------
/**
* Prep Quoted Printable
*
* Prepares string for Quoted - Printable Content - Transfer - Encoding
* Refer to RFC 2045 http://www.ietf.org/rfc/rfc2045.txt
*
* @access protected
* @param string
* @param integer
* @return string
*/
protected function _prep_quoted_printable($str, $charlim = '')
{
    // Set the character limit
    // Don't allow over 76, as that will make servers and MUAs barf
    // all over quoted-printable data
    if ($charlim == '' OR $charlim > '76')
    {
        $charlim = '76';
    }
    // Reduce multiple spaces
    $str = preg_replace("| +|", " ", $str);
    // kill nulls
    $str = preg_replace('/\x00+/', '', $str);
    // Standardize newlines
    if (strpos($str, "\r") !== FALSE)
    {
        $str = str_replace(array("\r\n", "\r"), "\n", $str);
    }
    // We are intentionally wrapping so mail servers will encode characters
    // properly and MUAs will behave, so {unwrap} must go!
    $str = str_replace(array('{unwrap}', '{/unwrap}'), '', $str);
    // Break into an array of lines
    $lines = explode("\n", $str);
    $escape = '=';
    $output = '';
    foreach ($lines as $line)
    {
        $length = strlen($line);
        $temp = '';
        // Loop through each character in the line to add soft-wrap
        // characters at the end of a line " =\r\n" and add the newly
        // processed line(s) to the output (see comment on $crlf class property)
        for ($i = 0; $i < $length; $i +  + )
        {
            // Grab the next character
            $char = substr($line, $i, 1);
            $ascii = ord($char);
            // Convert spaces and tabs but only if it's the end of the line
            if ($i == ($length - 1))
            {
                $char = ($ascii == '32' OR $ascii == '9') ? $escape.sprintf('%02s', dechex($ascii)) : $char;
            }
            // encode = signs
            if ($ascii == '61')
            {
                $char = $escape.strtoupper(sprintf('%02s', dechex($ascii)));
                // =3D
            }
            // If we're at the character limit, add the line to the output,
            // reset our temp variable, and keep on chuggin'
            if ((strlen($temp) + strlen($char)) >= $charlim)
            {
                $output . = $temp.$escape.$this->crlf;
                $temp = '';
            }
            // Add the character to our temporary line
            $temp . = $char;
        }
        // Add our completed line to the output
        $output . = $temp.$this->crlf;
    }
    // get rid of extra CRLF tacked onto the end
    $output = substr($output, 0, strlen($this->crlf) * - 1);
    return $output;
}
// --------------------------------------------------------------------
/**
* Prep Q Encoding
*
* Performs "Q Encoding" on a string for use in email headers.  It's related
  * but not identical to quoted-printable, so it has its own method
  *
  * @access public
  * @param str
  * @param bool // set to TRUE for processing From: headers
  * @return str
   */
 protected function _prep_q_encoding($str, $from = FALSE)
 {
  $str = str_replace(array("\r", "\n"), array('', ''), $str);

  // Line length must not exceed 76 characters, so we adjust for
  // a space, 7 extra characters =??Q??=, and the charset that we will add to each line

  $limit = 75 - 7 - strlen($this->charset);

  // these special characters must be converted too

  $convert = array('_', ' = ', '?');

  if ($from === TRUE)
  {
   $convert[] = ', ';
   $convert[] = ';
';
  }

  $output = '';
  $temp = '';

  for ($i = 0, $length = strlen($str); $i < $length; $i++)
  {
   // Grab the next character

   $char = substr($str, $i, 1);
   $ascii = ord($char);

   // convert ALL non-printable ASCII characters and our specials

   if ($ascii < 32 OR $ascii > 126 OR in_array($char, $convert))
   {
    $char = ' = '.dechex($ascii);
   }

   // handle regular spaces a bit more compactly than =20

   if ($ascii == 32)
   {
    $char = '_';
   }

   // If we're at the character limit, add the line to the output,
// reset our temp variable, and keep on chuggin'
if ((strlen($temp) + strlen($char)) >= $limit)
{
    $output . = $temp.$this->crlf;
    $temp = '';
}
// Add the character to our temporary line
$temp . = $char;
}
$str = $output.$temp;
// wrap each line with the shebang, charset, and transfer encoding
// the preceding space on successive lines is required for header "folding"
$str = trim(preg_replace('/^(.*)$/m', ' =?'.$this->charset.'?Q?$1?=', $str));
return $str;
}
// --------------------------------------------------------------------
/**
* Send Email
*
* @access public
* @return bool
*/
public function send()
{
    if ($this->_replyto_flag == FALSE)
    {
        $this->reply_to($this->_headers['From']);
    }
    if (( ! isset($this->_recipients) AND ! isset($this->_headers['To']))  AND
    ( ! isset($this->_bcc_array) AND ! isset($this->_headers['Bcc'])) AND
    ( ! isset($this->_headers['Cc'])))
    {
        $this->_set_error_message('lang:email_no_recipients');
        return FALSE;
    }
    $this->_build_headers();
    if ($this->bcc_batch_mode  AND  count($this->_bcc_array) > 0)
    {
        if (count($this->_bcc_array) > $this->bcc_batch_size)
        return $this->batch_bcc_send();
    }
    $this->_build_message();
    if ( ! $this->_spool_email())
    {
        return FALSE;
    }
    else
    {
        return TRUE;
    }
}
// --------------------------------------------------------------------
/**
* Batch Bcc Send.  Sends groups of BCCs in batches
*
* @access public
* @return bool
*/
public function batch_bcc_send()
{
    $float = $this->bcc_batch_size - 1;
    $set = "";
    $chunk = array();
    for ($i = 0; $i < count($this->_bcc_array); $i +  + )
    {
        if (isset($this->_bcc_array[$i]))
        {
            $set . = ", ".$this->_bcc_array[$i];
        }
        if ($i == $float)
        {
            $chunk[] = substr($set, 1);
            $float = $float + $this->bcc_batch_size;
            $set = "";
        }
        if ($i == count($this->_bcc_array) - 1)
        {
            $chunk[] = substr($set, 1);
        }
    }
    for ($i = 0; $i < count($chunk); $i +  + )
    {
        unset($this->_headers['Bcc']);
        unset($bcc);
        $bcc = $this->_str_to_array($chunk[$i]);
        $bcc = $this->clean_email($bcc);
        if ($this->protocol != 'smtp')
        {
            $this->_set_header('Bcc', implode(", ", $bcc));
        }
        else
        {
            $this->_bcc_array = $bcc;
        }
        $this->_build_message();
        $this->_spool_email();
    }
}
// --------------------------------------------------------------------
/**
* Unwrap special elements
*
* @access protected
* @return void
*/
protected function _unwrap_specials()
{
    $this->_finalbody = preg_replace_callback("/\{unwrap\}(.*?)\{\/unwrap\}/si", array($this, '_remove_nl_callback'), $this->_finalbody);
}
// --------------------------------------------------------------------
/**
* Strip line - breaks via callback
*
* @access protected
* @return string
*/
protected function _remove_nl_callback($matches)
{
    if (strpos($matches[1], "\r") !== FALSE OR strpos($matches[1], "\n") !== FALSE)
    {
        $matches[1] = str_replace(array("\r\n", "\r", "\n"), '', $matches[1]);
    }
    return $matches[1];
}
// --------------------------------------------------------------------
/**
* Spool mail to the mail server
*
* @access protected
* @return bool
*/
protected function _spool_email()
{
    $this->_unwrap_specials();
    switch ($this->_get_protocol())
    {
        case 'mail' :
        if ( ! $this->_send_with_mail())
        {
            $this->_set_error_message('lang:email_send_failure_phpmail');
            return FALSE;
        }
        break;
        case 'sendmail' :
        if ( ! $this->_send_with_sendmail())
        {
            $this->_set_error_message('lang:email_send_failure_sendmail');
            return FALSE;
        }
        break;
        case 'smtp' :
        if ( ! $this->_send_with_smtp())
        {
            $this->_set_error_message('lang:email_send_failure_smtp');
            return FALSE;
        }
        break;
    }
    $this->_set_error_message('lang:email_sent', $this->_get_protocol());
    return TRUE;
}
// --------------------------------------------------------------------
/**
* Send using mail()
*
* @access protected
* @return bool
*/
protected function _send_with_mail()
{
    if ($this->_safe_mode == TRUE)
    {
        if ( ! mail($this->_recipients, $this->_subject, $this->_finalbody, $this->_header_str))
        {
            return FALSE;
        }
        else
        {
            return TRUE;
        }
    }
    else
    {
        // most documentation of sendmail using the "-f" flag lacks a space after it, however
        // we've encountered servers that seem to require it to be in place.
        if ( ! mail($this->_recipients, $this->_subject, $this->_finalbody, $this->_header_str, "-f ".$this->clean_email($this->_headers['From'])))
        {
            return FALSE;
        }
        else
        {
            return TRUE;
        }
    }
}
// --------------------------------------------------------------------
/**
* Send using Sendmail
*
* @access protected
* @return bool
*/
protected function _send_with_sendmail()
{
    $fp = @popen($this->mailpath . " -oi -f ".$this->clean_email($this->_headers['From'])." -t", 'w');
    if ($fp === FALSE OR $fp === NULL)
    {
        // server probably has popen disabled, so nothing we can do to get a verbose error.
        return FALSE;
    }
    fputs($fp, $this->_header_str);
    fputs($fp, $this->_finalbody);
    $status = pclose($fp);
    if (version_compare(PHP_VERSION, '4.2.3') == - 1)
    {
        $status = $status >> 8 & 0xFF;
    }
    if ($status != 0)
    {
        $this->_set_error_message('lang:email_exit_status', $status);
        $this->_set_error_message('lang:email_no_socket');
        return FALSE;
    }
    return TRUE;
}
// --------------------------------------------------------------------
/**
* Send using SMTP
*
* @access protected
* @return bool
*/
protected function _send_with_smtp()
{
    if ($this->smtp_host == '')
    {
        $this->_set_error_message('lang:email_no_hostname');
        return FALSE;
    }
    $this->_smtp_connect();
    $this->_smtp_authenticate();
    $this->_send_command('from', $this->clean_email($this->_headers['From']));
    foreach ($this->_recipients as $val)
    {
        $this->_send_command('to', $val);
    }
    if (count($this->_cc_array) > 0)
    {
        foreach ($this->_cc_array as $val)
        {
            if ($val != "")
            {
                $this->_send_command('to', $val);
            }
        }
    }
    if (count($this->_bcc_array) > 0)
    {
        foreach ($this->_bcc_array as $val)
        {
            if ($val != "")
            {
                $this->_send_command('to', $val);
            }
        }
    }
    $this->_send_command('data');
    // perform dot transformation on any lines that begin with a dot
    $this->_send_data($this->_header_str . preg_replace('/^\./m', '..$1', $this->_finalbody));
    $this->_send_data('.');
    $reply = $this->_get_smtp_data();
    $this->_set_error_message($reply);
    if (strncmp($reply, '250', 3) != 0)
    {
        $this->_set_error_message('lang:email_smtp_error', $reply);
        return FALSE;
    }
    $this->_send_command('quit');
    return TRUE;
}
// --------------------------------------------------------------------
/**
* SMTP Connect
*
* @access protected
* @param string
* @return string
*/
protected function _smtp_connect()
{
    $ssl = NULL;
    if ($this->smtp_crypto == 'ssl')
    $ssl = 'ssl://';
    $this->_smtp_connect = fsockopen($ssl.$this->smtp_host,
    $this->smtp_port,
    $errno,
    $errstr,
    $this->smtp_timeout);
    if ( ! is_resource($this->_smtp_connect))
    {
        $this->_set_error_message('lang:email_smtp_error', $errno." ".$errstr);
        return FALSE;
    }
    $this->_set_error_message($this->_get_smtp_data());
    if ($this->smtp_crypto == 'tls')
    {
        $this->_send_command('hello');
        $this->_send_command('starttls');
        stream_socket_enable_crypto($this->_smtp_connect, TRUE, STREAM_CRYPTO_METHOD_TLS_CLIENT);
    }
    return $this->_send_command('hello');
}
// --------------------------------------------------------------------
/**
* Send SMTP command
*
* @access protected
* @param string
* @param string
* @return string
*/
protected function _send_command($cmd, $data = '')
{
    switch ($cmd)
    {
        case 'hello' :
        if ($this->_smtp_auth OR $this->_get_encoding() == '8bit')
        $this->_send_data('EHLO '.$this->_get_hostname());
        else
        $this->_send_data('HELO '.$this->_get_hostname());
        $resp = 250;
        break;
        case 'starttls' :
        $this->_send_data('STARTTLS');
        $resp = 220;
        break;
        case 'from' :
        $this->_send_data('MAIL FROM:<'.$data.'>');
        $resp = 250;
        break;
        case 'to' :
        $this->_send_data('RCPT TO:<'.$data.'>');
        $resp = 250;
        break;
        case 'data' :
        $this->_send_data('DATA');
        $resp = 354;
        break;
        case 'quit' :
        $this->_send_data('QUIT');
        $resp = 221;
        break;
    }
    $reply = $this->_get_smtp_data();
    $this->_debug_msg[] = "<pre>".$cmd.": ".$reply."</pre>";
    if (substr($reply, 0, 3) != $resp)
    {
        $this->_set_error_message('lang:email_smtp_error', $reply);
        return FALSE;
    }
    if ($cmd == 'quit')
    {
        fclose($this->_smtp_connect);
    }
    return TRUE;
}
// --------------------------------------------------------------------
/**
*  SMTP Authenticate
*
* @access protected
* @return bool
*/
protected function _smtp_authenticate()
{
    if ( ! $this->_smtp_auth)
    {
        return TRUE;
    }
    if ($this->smtp_user == ""  AND  $this->smtp_pass == "")
    {
        $this->_set_error_message('lang:email_no_smtp_unpw');
        return FALSE;
    }
    $this->_send_data('AUTH LOGIN');
    $reply = $this->_get_smtp_data();
    if (strncmp($reply, '334', 3) != 0)
    {
        $this->_set_error_message('lang:email_failed_smtp_login', $reply);
        return FALSE;
    }
    $this->_send_data(base64_encode($this->smtp_user));
    $reply = $this->_get_smtp_data();
    if (strncmp($reply, '334', 3) != 0)
    {
        $this->_set_error_message('lang:email_smtp_auth_un', $reply);
        return FALSE;
    }
    $this->_send_data(base64_encode($this->smtp_pass));
    $reply = $this->_get_smtp_data();
    if (strncmp($reply, '235', 3) != 0)
    {
        $this->_set_error_message('lang:email_smtp_auth_pw', $reply);
        return FALSE;
    }
    return TRUE;
}
// --------------------------------------------------------------------
/**
* Send SMTP data
*
* @access protected
* @return bool
*/
protected function _send_data($data)
{
    if ( ! fwrite($this->_smtp_connect, $data . $this->newline))
    {
        $this->_set_error_message('lang:email_smtp_data_failure', $data);
        return FALSE;
    }
    else
    {
        return TRUE;
    }
}
// --------------------------------------------------------------------
/**
* Get SMTP data
*
* @access protected
* @return string
*/
protected function _get_smtp_data()
{
    $data = "";
    while ($str = fgets($this->_smtp_connect, 512))
    {
        $data . = $str;
        if (substr($str, 3, 1) == " ")
        {
            break;
        }
    }
    return $data;
}
// --------------------------------------------------------------------
/**
* Get Hostname
*
* @access protected
* @return string
*/
protected function _get_hostname()
{
    return (empty($this->domain) ? ((isset($_SERVER['SERVER_NAME'])) ? $_SERVER['SERVER_NAME'] : 'localhost.localdomain') : $this->domain);
}
// --------------------------------------------------------------------
/**
* Get IP
*
* @access protected
* @return string
*/
protected function _get_ip()
{
    if ($this->_IP !== FALSE)
    {
        return $this->_IP;
    }
    $cip = (isset($_SERVER['HTTP_CLIENT_IP']) AND $_SERVER['HTTP_CLIENT_IP'] != "") ? $_SERVER['HTTP_CLIENT_IP'] : FALSE;
    $rip = (isset($_SERVER['REMOTE_ADDR']) AND $_SERVER['REMOTE_ADDR'] != "") ? $_SERVER['REMOTE_ADDR'] : FALSE;
    $fip = (isset($_SERVER['HTTP_X_FORWARDED_FOR']) AND $_SERVER['HTTP_X_FORWARDED_FOR'] != "") ? $_SERVER['HTTP_X_FORWARDED_FOR'] : FALSE;
    if ($cip && $rip) $this->_IP = $cip;
    elseif ($rip)  $this->_IP = $rip;
    elseif ($cip)  $this->_IP = $cip;
    elseif ($fip)  $this->_IP = $fip;
    if (strpos($this->_IP, ',') !== FALSE)
    {
        $x = explode(',', $this->_IP);
        $this->_IP = end($x);
    }
    if ( ! preg_match( "/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/", $this->_IP))
    {
        $this->_IP = '0.0.0.0';
    }
    unset($cip);
    unset($rip);
    unset($fip);
    return $this->_IP;
}
// --------------------------------------------------------------------
/**
* Get Debug Message
*
* @access public
* @return string
*/
public function print_debugger()
{
    $msg = '';
    if (count($this->_debug_msg) > 0)
    {
        foreach ($this->_debug_msg as $val)
        {
            $msg . = $val;
        }
    }
    $msg . = "<pre>".$this->_header_str."\n".htmlspecialchars($this->_subject)."\n".htmlspecialchars($this->_finalbody).'</pre>';
    return $msg;
}
// --------------------------------------------------------------------
/**
* Set Message
*
* @access protected
* @param string
* @return string
*/
protected function _set_error_message($msg, $val = '')
{
    $CI = & get_instance();
    $CI->lang->load('email');
    if (substr($msg, 0, 5) != 'lang:' || FALSE === ($line = $CI->lang->line(substr($msg, 5))))
    {
        $this->_debug_msg[] = str_replace('%s', $val, $msg)."<br />";
    }
    else
    {
        $this->_debug_msg[] = str_replace('%s', $val, $line)."<br />";
    }
}
// --------------------------------------------------------------------
/**
* Mime Types
*
* @access protected
* @param string
* @return string
*/
protected function _mime_types($ext = "")
{
    $mimes = array( 'hqx' => 'application/mac-binhex40',
    'cpt' => 'application/mac-compactpro',
    'doc' => 'application/msword',
    'bin' => 'application/macbinary',
    'dms' => 'application/octet-stream',
    'lha' => 'application/octet-stream',
    'lzh' => 'application/octet-stream',
    'exe' => 'application/octet-stream',
    'class' => 'application/octet-stream',
    'psd' => 'application/octet-stream',
    'so' => 'application/octet-stream',
    'sea' => 'application/octet-stream',
    'dll' => 'application/octet-stream',
    'oda' => 'application/oda',
    'pdf' => 'application/pdf',
    'ai' => 'application/postscript',
    'eps' => 'application/postscript',
    'ps' => 'application/postscript',
    'smi' => 'application/smil',
    'smil' => 'application/smil',
    'mif' => 'application/vnd.mif',
    'xls' => 'application/vnd.ms-excel',
    'ppt' => 'application/vnd.ms-powerpoint',
    'wbxml' => 'application/vnd.wap.wbxml',
    'wmlc' => 'application/vnd.wap.wmlc',
    'dcr' => 'application/x-director',
    'dir' => 'application/x-director',
    'dxr' => 'application/x-director',
    'dvi' => 'application/x-dvi',
    'gtar' => 'application/x-gtar',
    'php' => 'application/x-httpd-php',
    'php4' => 'application/x-httpd-php',
    'php3' => 'application/x-httpd-php',
    'phtml' => 'application/x-httpd-php',
    'phps' => 'application/x-httpd-php-source',
    'js' => 'application/x-javascript',
    'swf' => 'application/x-shockwave-flash',
    'sit' => 'application/x-stuffit',
    'tar' => 'application/x-tar',
    'tgz' => 'application/x-tar',
    'xhtml' => 'application/xhtml+xml',
    'xht' => 'application/xhtml+xml',
    'zip' => 'application/zip',
    'mid' => 'audio/midi',
    'midi' => 'audio/midi',
    'mpga' => 'audio/mpeg',
    'mp2' => 'audio/mpeg',
    'mp3' => 'audio/mpeg',
    'aif' => 'audio/x-aiff',
    'aiff' => 'audio/x-aiff',
    'aifc' => 'audio/x-aiff',
    'ram' => 'audio/x-pn-realaudio',
    'rm' => 'audio/x-pn-realaudio',
    'rpm' => 'audio/x-pn-realaudio-plugin',
    'ra' => 'audio/x-realaudio',
    'rv' => 'video/vnd.rn-realvideo',
    'wav' => 'audio/x-wav',
    'bmp' => 'image/bmp',
    'gif' => 'image/gif',
    'jpeg' => 'image/jpeg',
    'jpg' => 'image/jpeg',
    'jpe' => 'image/jpeg',
    'png' => 'image/png',
    'tiff' => 'image/tiff',
    'tif' => 'image/tiff',
    'css' => 'text/css',
    'html' => 'text/html',
    'htm' => 'text/html',
    'shtml' => 'text/html',
    'txt' => 'text/plain',
    'text' => 'text/plain',
    'log' => 'text/plain',
    'rtx' => 'text/richtext',
    'rtf' => 'text/rtf',
    'xml' => 'text/xml',
    'xsl' => 'text/xml',
    'mpeg' => 'video/mpeg',
    'mpg' => 'video/mpeg',
    'mpe' => 'video/mpeg',
    'qt' => 'video/quicktime',
    'mov' => 'video/quicktime',
    'avi' => 'video/x-msvideo',
    'movie' => 'video/x-sgi-movie',
    'doc' => 'application/msword',
    'word' => 'application/msword',
    'xl' => 'application/excel',
    'eml' => 'message/rfc822'
    );
    return ( ! isset($mimes[strtolower($ext)])) ? "application/x-unknown-content-type" : $mimes[strtolower($ext)];
}
}
// END CI_Email class
/* End of file Email.php  */
/* Location: ./system/libraries/Email.php  */