drupal/modules/watchdog.module

<?php

function watchdog_help() {
 ?>
  <P>The watchdog module monitors your website, captures system events in a log and records them to be reviewed by an authorized individual at a later time.  The watchdog log is simply a list of events recorded during operation and contains usage data, performance data, errors, warnings and operational information.  It is vital to check the watchdog report on a regular basis as it is often the only way to tell what is going on.</P>
  <P>To ease administration, the watchdog will automatically discard old log entries.</P>
 <?php
}

function watchdog_conf_options() {
  $period = array(3600 => format_interval(3600), 10800 => format_interval(10800), 21600 => format_interval(21600), 32400 => format_interval(32400), 43200 => format_interval(43200), 86400 => format_interval(86400), 172800 => format_interval(172800), 259200 => format_interval(259200), 604800 => format_interval(604800), 1209600 => format_interval(1209600), 2419200 => format_interval(2419200), 1000000000 => t("Never"));
  $output .= form_select(t("Discard entries older than"), "watchdog_clear", variable_get("watchdog_clear", 604800), $period, t("The time watchdog entries should be kept.  Older entries will be automatically discarded.  Requires crontab."));
  return $output;
}

function watchdog_cron() {
  db_query("DELETE FROM watchdog WHERE ". time() ." - timestamp > ". variable_get("watchdog_clear", 604800));
}

function watchdog_overview($type) {
  $color = array(account => "#FFEEAA", message => "#FFFFFF", special => "#A49FFF", warning => "#FFAA22", httpd => "#99DD99", error => "#EE4C4C");
  $query = array(account => "WHERE type = 'account'", regular => "WHERE type = 'message'", special => "WHERE type = 'special'", warning => "WHERE type = 'warning'", error => "WHERE type = 'error'", httpd => "WHERE type = 'httpd'");

  $result = db_query("SELECT w.*, u.userid FROM watchdog w LEFT JOIN users u ON w.user = u.id ". ($type ? $query[$type] : "") ." ORDER BY timestamp DESC LIMIT 1000");

  $output .= "<TABLE BORDER=\"1\" CELLPADDING=\"2\" CELLSPACING=\"2\">\n";
  $output .= " <TR><TH>date</TH><TH>message</TH><TH>user</TH><TH>operations</TH></TR>\n";
  while ($watchdog = db_fetch_object($result)) {
    if ($background = $color[$watchdog->type]) {
      $output .= " <TR BGCOLOR=\"$background\"><TD>". format_date($watchdog->timestamp, "small") ."</TD><TD>". substr(check_output($watchdog->message), 0, 64) ."</TD><TD ALIGN=\"center\">". format_username($watchdog->userid) ."</A></TD><TD ALIGN=\"center\"><A HREF=\"admin.php?mod=watchdog&op=view&id=$watchdog->id\">details</A></TD></TR>\n";
    }
  }
  $output .= "</TABLE>\n";

  return $output;
}

function watchdog_view($id) {
  $result = db_query("SELECT l.*, u.userid FROM watchdog l LEFT JOIN users u ON l.user = u.id WHERE l.id = '$id'");

  if ($watchdog = db_fetch_object($result)) {
    $output .= "<TABLE BORDER=\"1\" CELLPADDING=\"3\" CELLSPACING=\"0\">\n";
    $output .= " <TR><TH>Type:</TH><TD>". check_output($watchdog->type) ."</TD></TR>\n";
    $output .= " <TR><TH>Date:</TH><TD>". format_date($watchdog->timestamp, "large") ."</TD></TR>\n";
    $output .= " <TR><TH>User:</TH><TD>". format_username($watchdog->userid) ."</TD></TR>\n";
    $output .= " <TR><TH>Location:</TH><TD>". check_output($watchdog->location). "</TD></TR>\n";
    $output .= " <TR><TH>Message:</TH><TD>". check_output($watchdog->message) ."</TD></TR>\n";
    $output .= " <TR><TH>Hostname:</TH><TD>". check_output($watchdog->hostname) ."</TD></TR>\n";
    $output .= "</TABLE>\n";

    return $output;
  }
}

function watchdog_admin() {
  global $op, $id, $type, $order;

  print "<SMALL><A HREF=\"admin.php?mod=watchdog&type=account\">account messages</A> | <A HREF=\"admin.php?mod=watchdog&type=regular\">regular messages</A> | <A HREF=\"admin.php?mod=watchdog&type=special\">special messages</A> | <A HREF=\"admin.php?mod=watchdog&type=warning\">warning messages</A> | <A HREF=\"admin.php?mod=watchdog&type=error\">error messages</A> | <A HREF=\"admin.php?mod=watchdog&type=httpd\">httpd messages</A> | <A HREF=\"admin.php?mod=watchdog\">overview</A> | <A HREF=\"admin.php?mod=watchdog&op=help\">help</A></SMALL><HR>\n";

  switch ($op) {
    case "help":
      watchdog_help();
      break;
    case "view":
      print watchdog_view(check_input($id));
      break;
    default:
      print watchdog_overview($type);
  }
}

?>