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   1  <?php
   2  // $Id: ping.module,v 1.45 2006/11/21 20:14:18 dries Exp $
   3  
   4  /**
   5   * @file
   6   * Alerts other sites that your site has been updated.
   7   */
   8  
   9  /**
  10   * Implementation of hook_help().
  11   */
  12  function ping_help($section) {
  13    switch ($section) {
  14      case 'admin/help#ping':
  15        $output = '<p>'. t('The ping module is useful for notifying interested sites that your site has changed. It automatically sends notifications (called "pings") to the <a href="@external-http-pingomatic-com">pingomatic</a> service to tell it that your site has changed. In turn pingomatic will ping other services such as weblogs.com, Technorati, blo.gs, BlogRolling, Feedster.com, Moreover, etc.', array('@external-http-pingomatic-com' => 'http://pingomatic.com/')) .'</p>';
  16        $output .= '<p>'. t('The ping module requires <code>cron</code> or a similar periodic job scheduler to be enabled.') .'</p>';
  17        $output .= '<p>'. t('For more information please read the configuration and customization handbook <a href="@ping">Ping page</a>.', array('@ping' => 'http://drupal.org/handbook/modules/ping/')) .'</p>';
  18        return $output;
  19    }
  20  }
  21  
  22  /**
  23   * Implementation of hook_cron().
  24   *
  25   * Fire off notifications of updates to remote sites.
  26   */
  27  function ping_cron() {
  28    global $base_url;
  29  
  30    if (variable_get('site_name', 0)) {
  31      if (db_num_rows(db_query("SELECT nid FROM {node} WHERE status = 1 AND (created > '". variable_get('cron_last', time()) ."' OR changed > '". variable_get('cron_last', time()) ."')"))) {
  32        _ping_notify(variable_get('site_name', ''), $base_url);
  33      }
  34    }
  35  }
  36  
  37  /**
  38   * Call hook_ping() in all modules to notify remote sites that there is
  39   * new content at this one.
  40   */
  41  function _ping_notify($name, $url) {
  42    module_invoke_all('ping', $name, $url);
  43  }
  44  
  45  /**
  46   * Implementation of hook_ping().
  47   *
  48   * Notifies pingomatic.com, blo.gs, and technorati.com of changes at this site.
  49   */
  50  function ping_ping($name = '', $url = '') {
  51  
  52    $result = xmlrpc('http://rpc.pingomatic.com', 'weblogUpdates.ping', $name, $url);
  53  
  54    if ($result === FALSE) {
  55      watchdog('directory ping', t('Failed to notify pingomatic.com (site).'), WATCHDOG_WARNING);
  56    }
  57  }
  58  
  59