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<?php
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//
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// +----------------------------------------------------------------------+
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// | PHP Version 4                                                        |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2003 The PHP Group                                |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.02 of the PHP license,      |
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// | that is bundled with this package in the file LICENSE, and is        |
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// | available at through the world-wide-web at                           |
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// | http://www.php.net/license/2_02.txt.                                 |
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// | If you did not receive a copy of the PHP license and are unable to   |
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// | obtain it through the world-wide-web, please send a note to          |
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// | license@php.net so we can mail you a copy immediately.               |
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// +----------------------------------------------------------------------+
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// | Author: Chuck Hagenbuch <chuck@horde.org>                            |
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// +----------------------------------------------------------------------+
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/**
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 * Sendmail implementation of the PEAR Mail:: interface.
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 * @access public
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 * @package Mail
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 * @version $Revision: 1.1 $
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 */
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class Mail_sendmail extends Mail {
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	/**
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     * The location of the sendmail or sendmail wrapper binary on the
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     * filesystem.
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     * @var string
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     */
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    var $sendmail_path = '/usr/sbin/sendmail';
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	/**
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     * Any extra command-line parameters to pass to the sendmail or
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     * sendmail wrapper binary.
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     * @var string
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     */
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    var $sendmail_args = '';
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	/**
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     * Constructor.
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     *
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     * Instantiates a new Mail_sendmail:: object based on the parameters
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     * passed in. It looks for the following parameters:
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     *     sendmail_path    The location of the sendmail binary on the
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     *                      filesystem. Defaults to '/usr/sbin/sendmail'.
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     *
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     *     sendmail_args    Any extra parameters to pass to the sendmail
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     *                      or sendmail wrapper binary.
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     *
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     * If a parameter is present in the $params array, it replaces the
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     * default.
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     *
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     * @param array $params Hash containing any parameters different from the
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     *              defaults.
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     * @access public
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     */
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    function Mail_sendmail($params)
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    {
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        if (isset($params['sendmail_path'])) $this->sendmail_path = $params['sendmail_path'];
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        if (isset($params['sendmail_args'])) $this->sendmail_args = $params['sendmail_args'];
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        /*
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         * Because we need to pass message headers to the sendmail program on
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         * the commandline, we can't guarantee the use of the standard "\r\n"
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         * separator.  Instead, we use the system's native line separator.
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         */
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        $this->sep = (strpos(PHP_OS, 'WIN') === false) ? "\n" : "\r\n";
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    }
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	/**
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     * Implements Mail::send() function using the sendmail
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     * command-line binary.
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     *
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     * @param mixed $recipients Either a comma-seperated list of recipients
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     *              (RFC822 compliant), or an array of recipients,
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     *              each RFC822 valid. This may contain recipients not
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     *              specified in the headers, for Bcc:, resending
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     *              messages, etc.
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     *
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     * @param array $headers The array of headers to send with the mail, in an
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     *              associative array, where the array key is the
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     *              header name (ie, 'Subject'), and the array value
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     *              is the header value (ie, 'test'). The header
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     *              produced from those values would be 'Subject:
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     *              test'.
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     *
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     * @param string $body The full text of the message body, including any
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     *               Mime parts, etc.
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     *
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     * @return mixed Returns true on success, or a PEAR_Error
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     *               containing a descriptive error message on
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     *               failure.
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     * @access public
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     */
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    function send($recipients, $headers, $body)
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    {
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        $recipients = $this->parseRecipients($recipients);
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        if (PEAR::isError($recipients)) {
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            return $recipients;
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        }
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        $recipients = escapeShellCmd(implode(' ', $recipients));
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        $headerElements = $this->prepareHeaders($headers);
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        if (PEAR::isError($headerElements)) {
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            return $headerElements;
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        }
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        list($from, $text_headers) = $headerElements;
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        if (!isset($from)) {
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            return PEAR::raiseError('No from address given.');
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        } elseif (strpos($from, ' ') !== false ||
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                  strpos($from, ';') !== false ||
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                  strpos($from, '&') !== false ||
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                  strpos($from, '`') !== false) {
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            return PEAR::raiseError('From address specified with dangerous characters.');
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        }
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        $result = 0;
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        if (@is_file($this->sendmail_path)) {
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            $from = escapeShellCmd($from);
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            $mail = popen($this->sendmail_path . (!empty($this->sendmail_args) ? ' ' . $this->sendmail_args : '') . " -f$from -- $recipients", 'w');
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            fputs($mail, $text_headers);
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            fputs($mail, $this->sep);  // newline to end the headers section
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            fputs($mail, $body);
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            $result = pclose($mail);
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            if (version_compare(phpversion(), '4.2.3') == -1) {
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                // With older php versions, we need to shift the
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                // pclose result to get the exit code.
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                $result = $result >> 8 & 0xFF;
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            }
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        } else {
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            return PEAR::raiseError('sendmail [' . $this->sendmail_path . '] is not a valid file');
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        }
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        if ($result != 0) {
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            return PEAR::raiseError('sendmail returned error code ' . $result,
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                                    $result);
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        }
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        return true;
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    }
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}