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   1  <?php
   2  //
   3  // +----------------------------------------------------------------------+
   4  // | PHP Version 4                                                        |
   5  // +----------------------------------------------------------------------+
   6  // | Copyright (c) 1997-2003 The PHP Group                                |
   7  // +----------------------------------------------------------------------+
   8  // | This source file is subject to version 2.02 of the PHP license,      |
   9  // | that is bundled with this package in the file LICENSE, and is        |
  10  // | available at through the world-wide-web at                           |
  11  // | http://www.php.net/license/2_02.txt.                                 |
  12  // | If you did not receive a copy of the PHP license and are unable to   |
  13  // | obtain it through the world-wide-web, please send a note to          |
  14  // | license@php.net so we can mail you a copy immediately.               |
  15  // +----------------------------------------------------------------------+
  16  // | Author: Chuck Hagenbuch <chuck@horde.org>                            |
  17  // +----------------------------------------------------------------------+
  18  //
  19  // $Id: Mail.php,v 1.17 2006/09/15 03:41:18 jon Exp $
  20  
  21  require_once  'PEAR.php';
  22  
  23  /**
  24   * PEAR's Mail:: interface. Defines the interface for implementing
  25   * mailers under the PEAR hierarchy, and provides supporting functions
  26   * useful in multiple mailer backends.
  27   *
  28   * @access public
  29   * @version $Revision: 1.17 $
  30   * @package Mail
  31   */
  32  class Mail
  33  {
  34      /**
  35       * Line terminator used for separating header lines.
  36       * @var string
  37       */
  38      var $sep = "\r\n";
  39  
  40      /**
  41       * Provides an interface for generating Mail:: objects of various
  42       * types
  43       *
  44       * @param string $driver The kind of Mail:: object to instantiate.
  45       * @param array  $params The parameters to pass to the Mail:: object.
  46       * @return object Mail a instance of the driver class or if fails a PEAR Error
  47       * @access public
  48       */
  49      function &factory($driver, $params = array())
  50      {
  51          $driver = strtolower($driver);
  52          @include_once 'Mail/' . $driver . '.php';
  53          $class = 'Mail_' . $driver;
  54          if (class_exists($class)) {
  55              $mailer = new $class($params);
  56              return $mailer;
  57          } else {
  58              return PEAR::raiseError('Unable to find class for driver ' . $driver);
  59          }
  60      }
  61  
  62      /**
  63       * Implements Mail::send() function using php's built-in mail()
  64       * command.
  65       *
  66       * @param mixed $recipients Either a comma-seperated list of recipients
  67       *              (RFC822 compliant), or an array of recipients,
  68       *              each RFC822 valid. This may contain recipients not
  69       *              specified in the headers, for Bcc:, resending
  70       *              messages, etc.
  71       *
  72       * @param array $headers The array of headers to send with the mail, in an
  73       *              associative array, where the array key is the
  74       *              header name (ie, 'Subject'), and the array value
  75       *              is the header value (ie, 'test'). The header
  76       *              produced from those values would be 'Subject:
  77       *              test'.
  78       *
  79       * @param string $body The full text of the message body, including any
  80       *               Mime parts, etc.
  81       *
  82       * @return mixed Returns true on success, or a PEAR_Error
  83       *               containing a descriptive error message on
  84       *               failure.
  85       * @access public
  86       * @deprecated use Mail_mail::send instead
  87       */
  88      function send($recipients, $headers, $body)
  89      {
  90          $this->_sanitizeHeaders($headers);
  91  
  92          // if we're passed an array of recipients, implode it.
  93          if (is_array($recipients)) {
  94              $recipients = implode(', ', $recipients);
  95          }
  96  
  97          // get the Subject out of the headers array so that we can
  98          // pass it as a seperate argument to mail().
  99          $subject = '';
 100          if (isset($headers['Subject'])) {
 101              $subject = $headers['Subject'];
 102              unset($headers['Subject']);
 103          }
 104  
 105          // flatten the headers out.
 106          list(,$text_headers) = Mail::prepareHeaders($headers);
 107  
 108          return mail($recipients, $subject, $body, $text_headers);
 109  
 110      }
 111  
 112      /**
 113       * Sanitize an array of mail headers by removing any additional header
 114       * strings present in a legitimate header's value.  The goal of this
 115       * filter is to prevent mail injection attacks.
 116       *
 117       * @param array $headers The associative array of headers to sanitize.
 118       *
 119       * @access private
 120       */
 121      function _sanitizeHeaders(&$headers)
 122      {
 123          foreach ($headers as $key => $value) {
 124              $headers[$key] =
 125                  preg_replace('=((<CR>|<LF>|0x0A/%0A|0x0D/%0D|\\n|\\r)\S).*=i',
 126                               null, $value);
 127          }
 128      }
 129  
 130      /**
 131       * Take an array of mail headers and return a string containing
 132       * text usable in sending a message.
 133       *
 134       * @param array $headers The array of headers to prepare, in an associative
 135       *              array, where the array key is the header name (ie,
 136       *              'Subject'), and the array value is the header
 137       *              value (ie, 'test'). The header produced from those
 138       *              values would be 'Subject: test'.
 139       *
 140       * @return mixed Returns false if it encounters a bad address,
 141       *               otherwise returns an array containing two
 142       *               elements: Any From: address found in the headers,
 143       *               and the plain text version of the headers.
 144       * @access private
 145       */
 146      function prepareHeaders($headers)
 147      {
 148          $lines = array();
 149          $from = null;
 150  
 151          foreach ($headers as $key => $value) {
 152              if (strcasecmp($key, 'From') === 0) {
 153                  include_once  'Mail/RFC822.php';
 154                  $parser = &new Mail_RFC822();
 155                  $addresses = $parser->parseAddressList($value, 'localhost', false);
 156                  if (PEAR::isError($addresses)) {
 157                      return $addresses;
 158                  }
 159  
 160                  $from = $addresses[0]->mailbox . '@' . $addresses[0]->host;
 161  
 162                  // Reject envelope From: addresses with spaces.
 163                  if (strstr($from, ' ')) {
 164                      return false;
 165                  }
 166  
 167                  $lines[] = $key . ': ' . $value;
 168              } elseif (strcasecmp($key, 'Received') === 0) {
 169                  $received = array();
 170                  if (is_array($value)) {
 171                      foreach ($value as $line) {
 172                          $received[] = $key . ': ' . $line;
 173                      }
 174                  }
 175                  else {
 176                      $received[] = $key . ': ' . $value;
 177                  }
 178                  // Put Received: headers at the top.  Spam detectors often
 179                  // flag messages with Received: headers after the Subject:
 180                  // as spam.
 181                  $lines = array_merge($received, $lines);
 182              } else {
 183                  // If $value is an array (i.e., a list of addresses), convert
 184                  // it to a comma-delimited string of its elements (addresses).
 185                  if (is_array($value)) {
 186                      $value = implode(', ', $value);
 187                  }
 188                  $lines[] = $key . ': ' . $value;
 189              }
 190          }
 191  
 192          return array($from, join($this->sep, $lines));
 193      }
 194  
 195      /**
 196       * Take a set of recipients and parse them, returning an array of
 197       * bare addresses (forward paths) that can be passed to sendmail
 198       * or an smtp server with the rcpt to: command.
 199       *
 200       * @param mixed Either a comma-seperated list of recipients
 201       *              (RFC822 compliant), or an array of recipients,
 202       *              each RFC822 valid.
 203       *
 204       * @return mixed An array of forward paths (bare addresses) or a PEAR_Error
 205       *               object if the address list could not be parsed.
 206       * @access private
 207       */
 208      function parseRecipients($recipients)
 209      {
 210          include_once  'Mail/RFC822.php';
 211  
 212          // if we're passed an array, assume addresses are valid and
 213          // implode them before parsing.
 214          if (is_array($recipients)) {
 215              $recipients = implode(', ', $recipients);
 216          }
 217  
 218          // Parse recipients, leaving out all personal info. This is
 219          // for smtp recipients, etc. All relevant personal information
 220          // should already be in the headers.
 221          $addresses = Mail_RFC822::parseAddressList($recipients, 'localhost', false);
 222  
 223          // If parseAddressList() returned a PEAR_Error object, just return it.
 224          if (PEAR::isError($addresses)) {
 225              return $addresses;
 226          }
 227  
 228          $recipients = array();
 229          if (is_array($addresses)) {
 230              foreach ($addresses as $ob) {
 231                  $recipients[] = $ob->mailbox . '@' . $ob->host;
 232              }
 233          }
 234  
 235          return $recipients;
 236      }
 237  
 238  }