www_archline_hu/cadline/backend/maintenance/libraries/mmail/smtp.php

<?php

/**
 * o------------------------------------------------------------------------------o
 * | This package is licensed under the Phpguru license 2008. A quick summary is  |
 * | that the code is free to use for non-commercial purposes. For commercial     |
 * | purposes of any kind there is a small license fee to pay. You can read more  |
 * | at:                                                                          |
 * |                  http://www.phpguru.org/static/license.html                  |
 * o------------------------------------------------------------------------------o
 *
 * ? Copyright 2008 Richard Heyes
 */

define('SMTP_STATUS_NOT_CONNECTED', 1, true);
define('SMTP_STATUS_CONNECTED', 2, true);

class smtp
{
    private $authenticated;
    private $connection;
    private $recipients;
    private $headers;
    private $timeout;
    private $errors;
    private $status;
    private $body;
    private $from;
    private $host;
    private $port;
    private $helo;
    private $auth;
    private $user;
    private $pass;

    /**
     * Constructor function. Arguments:
     * $params - An assoc array of parameters:
     *
     *   host    - The hostname of the smtp server        Default: localhost
     *   port    - The port the smtp server runs on        Default: 25
     *   helo    - What to send as the HELO command        Default: localhost
     *             (typically the hostname of the
     *             machine this script runs on)
     *   auth    - Whether to use basic authentication    Default: FALSE
     *   user    - Username for authentication            Default: <blank>
     *   pass    - Password for authentication            Default: <blank>
     *   timeout - The timeout in seconds for the call    Default: 5
     *             to fsockopen()
     */
    public function __construct($params = array())
    {

        if (!defined('CRLF'))
            define('CRLF', "\r\n", TRUE);

        $this->authenticated = FALSE;
        $this->timeout       = 5;
        $this->status        = SMTP_STATUS_NOT_CONNECTED;
        $this->host          = 'localhost';
        $this->port          = 25;
        $this->helo          = 'localhost';
        $this->auth          = FALSE;
        $this->user          = '';
        $this->pass          = '';
        $this->errors        = array();

        foreach ($params as $key => $value) {
            $this->$key = $value;
        }
    }

    /**
     * Connect function. This will, when called
     * statically, create a new smtp object, 
     * call the connect function (ie this function)
     * and return it. When not called statically,
     * it will connect to the server and send
     * the HELO command.
     */
    public function connect($params = array())
    {
        if (!isset($this->status)) {
            $obj = new smtp($params);
            if ($obj->connect()) {
                $obj->status = SMTP_STATUS_CONNECTED;
            }
            return $obj;
        } else {
            $this->connection = fsockopen($this->host, $this->port, $errno, $errstr, $this->timeout);
            if (function_exists('socket_set_timeout')) {
                @socket_set_timeout($this->connection, 5, 0);
            }

            $greeting = $this->get_data();
            if (is_resource($this->connection)) {
                return $this->auth ? $this->ehlo() : $this->helo();
            } else {
                $this->errors[] = 'Failed to connect to server: ' . $errstr;
                return FALSE;
            }
        }
    }

    /**
     * Function which handles sending the mail.
     * Arguments:
     * $params    - Optional assoc array of parameters.
     *            Can contain:
     *              recipients - Indexed array of recipients
     *              from       - The from address. (used in MAIL FROM:),
     *                           this will be the return path
     *              headers    - Indexed array of headers, one header per array entry
     *              body       - The body of the email
     *            It can also contain any of the parameters from the connect()
     *            function
     */
    public function send($params = array())
    {
        foreach ($params as $key => $value) {
            $this->set($key, $value);
        }
        if ($this->is_connected()) {
            // Do we auth or not? Note the distinction between the auth variable and auth() function
            if ($this->auth and !$this->authenticated) {
                if (!$this->auth())
                    return false;
            }
            $this->mail($this->from);

            if (is_array($this->recipients)) {
                foreach ($this->recipients as $value) {
                    $this->rcpt($value);
                }
            } else {
                $this->rcpt($this->recipients);
            }
            if (!$this->data()) {
                return false;
            }
            // Transparency
            $headers = str_replace(CRLF . '.', CRLF . '..', trim(implode(CRLF, $this->headers)));
            $body    = str_replace(CRLF . '.', CRLF . '..', $this->body);
            $body    = substr($body, 0, 1) == '.' ? '.' . $body : $body;
            $this->send_data($headers);
            $this->send_data('');
            $this->send_data($body);
            $this->send_data('.');

            $result = (substr(trim($this->get_data()), 0, 3) === '250');
            //$this->rset();
            return $result;
        } else {
            $this->errors[] = 'Not connected!';
            return FALSE;
        }
    }

    /**
     * Function to implement HELO cmd
     */
    private function helo()
    {
        if (
            is_resource($this->connection)
            and $this->send_data('HELO ' . $this->helo)
            and substr(trim($error = $this->get_data()), 0, 3) === '250'
        ) {
            return true;
        } else {
            $this->errors[] = 'HELO command failed, output: ' . trim(substr(trim($error), 3));
            return false;
        }
    }

    /**
     * Function to implement EHLO cmd
     */
    private function ehlo()
    {
        if (
            is_resource($this->connection)
            and $this->send_data('EHLO ' . $this->helo)
            and substr(trim($error = $this->get_data()), 0, 3) === '250'
        ) {
            return true;
        } else {
            $this->errors[] = 'EHLO command failed, output: ' . trim(substr(trim($error), 3));
            return false;
        }
    }

    /**
     * Function to implement RSET cmd
     */
    private function rset()
    {
        if (
            is_resource($this->connection)
            and $this->send_data('RSET')
            and substr(trim($error = $this->get_data()), 0, 3) === '250'
        ) {

            return true;
        } else {
            $this->errors[] = 'RSET command failed, output: ' . trim(substr(trim($error), 3));
            return false;
        }
    }

    /**
     * Function to implement QUIT cmd
     */
    private function quit()
    {
        if (
            is_resource($this->connection)
            and $this->send_data('QUIT')
            and substr(trim($error = $this->get_data()), 0, 3) === '221'
        ) {

            fclose($this->connection);
            $this->status = SMTP_STATUS_NOT_CONNECTED;
            return true;
        } else {
            $this->errors[] = 'QUIT command failed, output: ' . trim(substr(trim($error), 3));
            return false;
        }
    }

    /**
     * Function to implement AUTH cmd
     */
    private function auth()
    {
        if (
            is_resource($this->connection)
            and $this->send_data('AUTH LOGIN')
            and substr(trim($error = $this->get_data()), 0, 3) === '334'
            and $this->send_data(base64_encode($this->user))            // Send username
            and substr(trim($error = $this->get_data()), 0, 3) === '334'
            and $this->send_data(base64_encode($this->pass))            // Send password
            and substr(trim($error = $this->get_data()), 0, 3) === '235'
        ) {
            $this->authenticated = true;
            return true;
        } else {
            $this->errors[] = 'AUTH command failed: ' . trim(substr(trim($error), 3));
            return false;
        }
    }

    /**
     * Function that handles the MAIL FROM: cmd
     */
    private function mail($from)
    {
        if ($this->is_connected()) {
            if ($this->send_data('MAIL FROM:<' . $from . '>')) {
                if (substr(trim($this->get_data()), 0, 3) === '250') {
                    return true;
                }
            }
        } else {
            return false;
        }
    }

    /**
     * Function that handles the RCPT TO: cmd
     */
    private function rcpt($to)
    {
        if ($this->is_connected()) {
            if ($this->send_data('RCPT TO:<' . $to . '>')) {
                if (substr(trim($error = $this->get_data()), 0, 2) === '25')
                    return true;
            }
        } else {
            $this->errors[] = trim(substr(trim($error), 3));
            return false;
        }
    }

    /**
     * Function that sends the DATA cmd
     */
    private function data()
    {
        if ($this->is_connected()) {
            if ($this->send_data('DATA')) {
                if (substr(trim($error = $this->get_data()), 0, 3) === '354')
                    return true;
            }
        } else {
            $this->errors[] = trim(substr(trim($error), 3));
            return false;
        }
    }

    /**
     * Function to determine if this object
     * is connected to the server or not.
     */
    private function is_connected()
    {
        return (is_resource($this->connection) and ($this->status === SMTP_STATUS_CONNECTED));
    }

    /**
     * Function to send a bit of data
     */
    private function send_data($data)
    {
        if (is_resource($this->connection)) {
            return fwrite($this->connection, $data . CRLF, strlen($data) + 2);
        } else {
            return false;
        }
    }

    /**
     * Function to get data.
     */
    private function get_data()
    {
        $return = '';
        $line   = '';
        $loops  = 0;

        if (is_resource($this->connection)) {
            while ((strpos($return, CRLF) === FALSE or substr($line, 3, 1) !== ' ') and $loops < 100) {
                $line    = fgets($this->connection, 512);
                $return .= $line;
                $loops++;
            }
            return $return;
        } else
            return false;
    }

    /**
     * Sets a variable
     */
    public function set($var, $value)
    {
        $this->$var = $value;
        return true;
    }

    /**
     * Function to return the errors array
     */
    public function getErrors()
    {
        return $this->errors;
    }
}