drupal/modules/watchdog.module

<?

$module = array("help" => "watchdog_help",
                "cron" => "watchdog_cron",
                "admin" => "watchdog_admin");

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 remove old logs.</P>
 <?
}

function watchdog_cron() {
  watchdog_clean();
}

function watchdog_display($order = "date") {
  $colors = array("#D8BFD8", "#6495ED", "#6A5ADF", "#FFFFFF", "#FFA500", "#FF3C3C");
  $fields = array("date" => "id DESC", "username" => "user", "location" => "location", "message" => "message DESC", "level" => "level DESC");

  // Perform query:
  $result = db_query("SELECT l.*, u.userid FROM watchdog l LEFT JOIN users u ON l.user = u.id ORDER BY l.$fields[$order]");

  // Generate output:
  $output .= "<TABLE BORDER=\"1\" CELLPADDING=\"2\" CELLSPACING=\"2\">\n";
  $output .= " <TR>\n";
  $output .= "  <TH ALIGN=\"right\" COLSPAN=\"4\">\n";
  $output .= "   <FORM ACTION=\"admin.php?mod=watchdog\" METHOD=\"post\">\n";
  $output .= "    <SELECT NAME=\"order\">\n";
  foreach ($fields as $key=>$value) {
    $output .= "     <OPTION VALUE=\"$key\"". ($key == $order ? " SELECTED" : "") .">Sort by $key</OPTION>\n";
  }
  $output .= "    </SELECT>\n";
  $output .= "    <INPUT TYPE=\"submit\" NAME=\"op\" VALUE=\"Update\">\n";
  $output .= "   </FORM>\n";
  $output .= "  </TH>\n";
  $output .= " </TR>\n";
  $output .= " <TR>\n";
  $output .= "  <TH>date</TH>\n";
  $output .= "  <TH>message</TH>\n";
  $output .= "  <TH>user</TH>\n";
  $output .= "  <TH>operations</TH>\n";
  $output .= " </TR>\n";

  while ($watchdog = db_fetch_object($result)) {
    $output .= " <TR BGCOLOR=\"". $colors[$watchdog->level] ."\"><TD>". format_date($watchdog->timestamp) ."</TD><TD>". substr(check_output($watchdog->message), 0, 44) ."</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";

  print $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";
    $output .= " <TR><TH>Level:</TH><TD>". check_output($watchdog->level) ."</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";
    print $output;
  }
}

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

  print "<SMALL><A HREF=\"admin.php?mod=watchdog\">overview</A> | <A HREF=\"admin.php?mod=watchdog&op=help\">help</A></SMALL><HR>\n";

  switch ($op) {
    case "help":
      watchdog_help();
      break;
    case "view":
      watchdog_view(check_input($id));
      break;
    case "Update":
      watchdog_display(check_input($order));
      break;
    default:
      watchdog_display();
  }
}

?>