function hook_watchdog

Log an event message.

This hook allows modules to route log events to custom destinations, such as SMS, Email, pager, syslog, ...etc.

Parameters

array $log_entry: An associative array containing the following keys:

• type: The type of message for this entry.
• user: The user object for the user who was logged in when the event happened.
• uid: The user ID for the user who was logged in when the event happened.
• request_uri: The request URI for the page the event happened in.
• referer: The page that referred the user to the page where the event occurred.
• ip: The IP address where the request for the page came from.
• timestamp: The UNIX timestamp of the date/time the event occurred.
• severity: The severity of the message; one of the following values as defined in RFC 3164:
  • WATCHDOG_EMERGENCY: Emergency, system is unusable.
  • WATCHDOG_ALERT: Alert, action must be taken immediately.
  • WATCHDOG_CRITICAL: Critical conditions.
  • WATCHDOG_ERROR: Error conditions.
  • WATCHDOG_WARNING: Warning conditions.
  • WATCHDOG_NOTICE: Normal but significant conditions.
  • WATCHDOG_INFO: Informational messages.
  • WATCHDOG_DEBUG: Debug-level messages.
• link: An optional link provided by the module that called the watchdog() function.
• message: The text of the message to be logged. Variables in the message are indicated by using placeholder strings alongside the variables argument to declare the value of the placeholders. See t() for documentation on how the message and variable parameters interact.
• variables: An array of variables to be inserted into the message on display. Will be NULL or missing if a message is already translated or if the message is not possible to translate.

Related topics

File

drupal/core/modules/system/system.api.php, line 1811

Hooks provided by Drupal core and the System module.

Code

function hook_watchdog(array $log_entry) {
  global $base_url;
  $language_interface = language(\Drupal\Core\Language\Language::TYPE_INTERFACE);
  $severity_list = array(
    WATCHDOG_EMERGENCY => t('Emergency'),
    WATCHDOG_ALERT => t('Alert'),
    WATCHDOG_CRITICAL => t('Critical'),
    WATCHDOG_ERROR => t('Error'),
    WATCHDOG_WARNING => t('Warning'),
    WATCHDOG_NOTICE => t('Notice'),
    WATCHDOG_INFO => t('Info'),
    WATCHDOG_DEBUG => t('Debug'),
  );
  $to = 'someone@example.com';
  $params = array();
  $params['subject'] = t('[@site_name] @severity_desc: Alert from your web site', array(
    '@site_name' => config('system.site')
      ->get('name'),
    '@severity_desc' => $severity_list[$log_entry['severity']],
  ));
  $params['message'] = "\nSite:         @base_url";
  $params['message'] .= "\nSeverity:     (@severity) @severity_desc";
  $params['message'] .= "\nTimestamp:    @timestamp";
  $params['message'] .= "\nType:         @type";
  $params['message'] .= "\nIP Address:   @ip";
  $params['message'] .= "\nRequest URI:  @request_uri";
  $params['message'] .= "\nReferrer URI: @referer_uri";
  $params['message'] .= "\nUser:         (@uid) @name";
  $params['message'] .= "\nLink:         @link";
  $params['message'] .= "\nMessage:      \n\n@message";
  $params['message'] = t($params['message'], array(
    '@base_url' => $base_url,
    '@severity' => $log_entry['severity'],
    '@severity_desc' => $severity_list[$log_entry['severity']],
    '@timestamp' => format_date($log_entry['timestamp']),
    '@type' => $log_entry['type'],
    '@ip' => $log_entry['ip'],
    '@request_uri' => $log_entry['request_uri'],
    '@referer_uri' => $log_entry['referer'],
    '@uid' => $log_entry['uid'],
    '@name' => $log_entry['user']->name,
    '@link' => strip_tags($log_entry['link']),
    '@message' => strip_tags($log_entry['message']),
  ));
  drupal_mail('emaillog', 'entry', $to, $language_interface->langcode, $params);
}