X-Git-Url: https://git-public.kairo.at/?p=php-utility-classes.git;a=blobdiff_plain;f=include%2Fclasses%2Frrdstat.php-class;h=3f5e98f920ca49e0dde13dc64a164752774fccff;hp=60b925fedafb5f1f5b4c7ebd09387dfaebff0a51;hb=ea29ba0c875bd7bfb762d831e81e8074c5f6ce32;hpb=506711ee336f82bfe5295dd722ecc6fb1fc00a33;ds=sidebyside

diff --git a/include/classes/rrdstat.php-class b/include/classes/rrdstat.php-class
index 60b925f..3f5e98f 100644
--- a/include/classes/rrdstat.php-class
+++ b/include/classes/rrdstat.php-class
@@ -12,7 +12,7 @@
  *
  * The Initial Developer of the Original Code is
  * KaiRo - Robert Kaiser.
- * Portions created by the Initial Developer are Copyright (C) 2005
+ * Portions created by the Initial Developer are Copyright (C) 2005-2006
  * the Initial Developer. All Rights Reserved.
  *
  * Contributor(s): Robert Kaiser <kairo@kairo.at>
@@ -23,138 +23,146 @@ class rrdstat {
   // rrdstat PHP class
   // rrdtool statistics functions
   //
-  // function rrdstat($rrdconfig, [$conf_id])
+  // function __construct($rrdconfig, [$conf_id])
   //   CONSTRUCTOR
   //     if $conf_id is set, $rrdconfig is a total configuration set
   //     else it's the configuration for this one RRD
   //     currently only a config array is supported, XML config is planned
   //
-  // var $rrd_file
+  // private $rrdtool_bin
+  // RRDtool binary to use
+  //
+  // private $rrd_file
   // RRD file name
   //
-  // var $basename
+  // private $basename
   // base name for this RRD (usually file name without .rrd)
   //
-  // var $basedir
+  // private $basedir
   // base directory for this RRD (with a trailing slash)
   //   note that $rrd_file usually includes that path as well, but graph directory gets based on this value
   //
-  // var $config_all
+  // private $config_all
   // complete, raw configuration array set
   //
-  // var $config_raw
+  // private $config_raw
   // configuration array set for current RRD
   //
-  // var $config_graph
+  // private $config_graph
   // configuration array set for default graph in this RRD
   //
-  // var $config_page
+  // private $config_page
   // configuration array set for default page in this RRD
   //
-  // var $rrd_fields
+  // private $rrd_fields
   // definition of this RRD's fields
   //
-  // var $rra_base
+  // private $rra_base
   // definition of this RRD's base RRAs
   //
-  // var $rrd_step
+  // private $rrd_step
   // basic stepping of this RRD in seconds (default: 300)
   //
-  // var $rra_add_max
+  // private $rra_add_max
   // should RRAs for MAX be added for every base RRA? (bool, default: true)
   //
-  // var $status
+  // private $status
   // status of the RRD (unused/ok/readonly/graphonly)
   //   note that most functions require certain status values
   //   (e.g. update only works if status is ok, graph for ok/readonly/graphonly)
   //
-  // var $mod_textdomain
+  // private $mod_textdomain
   //   GNU gettext domain for this module
   //
-  // function set_def($rrdconfig, [$conf_id])
+  // private function set_def($rrdconfig, [$conf_id])
   //   set definitions based on given configuration
   //   [intended for internal use, called by the constructor]
   //
-  // function create()
+  // public function rrd_version() {
+  //   get RRDtool version string
+  //
+  // public function create()
   //   create RRD file according to set config
   //
-  // function update([$upArray])
+  // public function update([$upArray])
   //   feed new data into RRD (either use given array of values or use auto-update info from config)
   //
-  // function fetch([$cf] = 'AVERAGE', $resolution = null, $start = null, $end = null)
+  // public function fetch([$cf] = 'AVERAGE', $resolution = null, $start = null, $end = null)
   //   fetch data from the defined RRD
   //     using given consolidation function [default is AVERAGE],
   //     resolution (seconds, default is the RRD's stepping),
   //     start and end times (unix epoch, defaults are the RRD's last update time)
   //
-  // function last_update()
+  // public function last_update()
   //   fetch time of last update in this RRD file
   //
-  // function graph([$timeframe], [$sub], [$extra])
+  // public function graph([$timeframe], [$sub], [$extra])
   //   create a RRD graph (and return all meta info in a flat string)
   //     for given timeframe (day [default]/week/month/year),
   //     sub-graph ID (if given) and extra config options (if given)
   //
-  // function graph_plus([$timeframe], [$sub], [$extra])
+  // public function graph_plus([$timeframe], [$sub], [$extra])
   //   create a RRD graph (see above) and return meta info as a ready-to-use array
   //
-  // function page([$sub], [$page_extras], [$graph_extras])
+  // public function page([$sub], [$page_extras], [$graph_extras])
   //   create a (HTML) page and return it in a string
   //     for given sub-page ID (if given, default is a simple HTML page)
   //     and extra page and graph config options (if given)
   //
-  // function simple_html([$sub], [$page_extras], [$graph_extras])
+  // public function simple_html([$sub], [$page_extras], [$graph_extras])
   //   create a simple (MRTG-like) HTML page and return it in a string
   //   XXX: this is here temporarily for compat only, it's preferred to use page()!
   //
-  // function page_index($pconf)
+  // private function page_index($pconf)
   //   create a bare, very simple index list HTML page and return it in a string
   //   using given page config options
   //   [intended for internal use, called by page()]
   //
-  // function page_overview($pconf, [$graph_extras])
+  // private function page_overview($pconf, [$graph_extras])
   //   create an overview HTML page (including graphs) and return it in a string
   //   using given page config options and extra graph options (if given)
   //   [intended for internal use, called by page()]
   //
-  // function page_simple($pconf, [$graph_extras])
+  // private function page_simple($pconf, [$graph_extras])
   //   create a simple (MRTG-like) HTML page and return it in a string
   //   using given page config options and extra graph options (if given)
   //   [intended for internal use, called by page()]
   //
-  // function h_page_statsArray($pconf)
+  // private function h_page_statsArray($pconf)
   //   return array of stats to list on a page, using given page config options
   //   [intended for internal use, called by page_*()]
   //
-  // function h_page_footer()
+  // private function h_page_footer()
   //   return generic page footer
   //   [intended for internal use, called by page_*()]
   //
-  // function text_quote($text)
+  // private function text_quote($text)
   //   return a quoted/escaped text for use in rrdtool commandline text fields
 
-  var $rrd_file = null;
-  var $basename = null;
-  var $basedir = null;
+  private $rrdtool_bin = '/usr/bin/rrdtool';
+
+  private $rrd_file = null;
+  private $basename = null;
+  private $basedir = null;
 
-  var $config_all = null;
-  var $config_raw = null;
-  var $config_graph = null;
-  var $config_page = null;
+  private $config_all = null;
+  private $config_raw = null;
+  private $config_graph = null;
+  private $config_page = null;
 
-  var $rrd_fields = array();
-  var $rra_base = array();
-  var $rrd_step = 300;
-  var $rra_add_max = true;
+  private $rrd_fields = array();
+  private $rra_base = array();
+  private $rrd_step = 300;
+  private $rra_add_max = true;
 
-  var $status = 'unused';
+  private $status = 'unused';
 
-  var $mod_textdomain;
+  private $mod_textdomain;
 
-  function rrdstat($rrdconfig, $conf_id = null) {
+  function __construct($rrdconfig, $conf_id = null) {
     // ***** init RRD stat module *****
     $this->mod_textdomain = 'class_rrdstat';
-    $mod_charset = 'iso-8859-15';
+    $mod_charset = 'utf-8';
 
     bindtextdomain($this->mod_textdomain, class_exists('baseutils')?baseutils::getDir('locale'):'locale/');
     bind_textdomain_codeset($this->mod_textdomain, $mod_charset);
@@ -178,7 +186,7 @@ class rrdstat {
     }
   }
 
-  function set_def($rrdconfig, $conf_id = null) {
+  private function set_def($rrdconfig, $conf_id = null) {
     if (is_array($rrdconfig)) {
       // we have an array in the format we like to have
       $complete_conf =& $rrdconfig;
@@ -192,8 +200,12 @@ class rrdstat {
       $iinfo = isset($complete_conf[$conf_id])?$complete_conf[$conf_id]:array();
       if (isset($complete_conf['*'])) {
         $iinfo = (array)$iinfo + (array)$complete_conf['*'];
-        if (isset($complete_conf['*']['graph'])) { $iinfo['graph'] = (array)$iinfo['graph'] + (array)$complete_conf['*']['graph']; }
-        if (isset($complete_conf['*']['page'])) { $iinfo['page'] = (array)$iinfo['page'] + (array)$complete_conf['*']['page']; }
+        if (isset($complete_conf['*']['graph'])) {
+          $iinfo['graph'] = (array)$iinfo['graph'] + (array)$complete_conf['*']['graph'];
+        }
+        if (isset($complete_conf['*']['page'])) {
+          $iinfo['page'] = (array)$iinfo['page'] + (array)$complete_conf['*']['page'];
+        }
       }
     }
     else {
@@ -238,7 +250,7 @@ class rrdstat {
       }
 
 
-      // MRTG-style RRD "database", see http://people.ee.ethz.ch/~oetiker/webtools/rrdtool/tut/rrdtutorial.en.html
+      // MRTG-style RRD "database", see http://oss.oetiker.ch/rrdtool/tut/rrdtutorial.en.html
       //
       // archives (RRAs):
       // 600 samples of 5 minutes  (2 days and 2 hours)
@@ -267,11 +279,31 @@ class rrdstat {
     $this->config_all = $complete_conf;
   }
 
-  function create() {
+  public function rrd_version() {
+    // return RRDtool version
+    static $version;
+    if (!isset($version)) {
+      $create_cmd = $this->rrdtool_bin.' --version';
+      $return = `$create_cmd 2>&1`;
+      if (strpos($return, 'ERROR') !== false) {
+        trigger_error($this->rrd_file.' - rrd version error: '.$return, E_USER_WARNING);
+      }
+
+      if (preg_match('/^\s*RRDtool ([\d\.]+)\s+/', $return, $regs)) {
+        $version = $regs[1];
+      }
+      else {
+        $version = '0.0';
+      }
+    }
+  return $version;
+  }
+
+  public function create() {
     // create RRD file
 
     // compose create command
-    $create_cmd = 'rrdtool create '.$this->rrd_file.' --step '.$this->rrd_step;
+    $create_cmd = $this->rrdtool_bin.' create '.$this->rrd_file.' --step '.$this->rrd_step;
     foreach ($this->rrd_fields as $ds) {
       if (!isset($ds['type'])) { $ds['type'] = 'COUNTER'; }
       if (!isset($ds['heartbeat'])) { $ds['heartbeat'] = 2*$this->rrd_step; }
@@ -305,7 +337,7 @@ class rrdstat {
     else { $this->status = 'ok'; }
   }
 
-  function update($upArray = null) {
+  public function update($upArray = null) {
     // feed new data into RRD
     if ($this->status != 'ok') { trigger_error('Cannot update non-writeable file', E_USER_WARNING); return false; }
     $upvals = array();
@@ -378,7 +410,8 @@ class rrdstat {
     array_walk($upvals, $walkfunc);
     $return = null;
     if (count($upvals)) {
-      $update_cmd = 'rrdtool update '.$this->rrd_file.($key_names?' --template '.implode(':', array_keys($upvals)):'').' N:'.implode(':', $upvals);
+      $update_cmd = $this->rrdtool_bin.' update '.$this->rrd_file
+                    .($key_names?' --template '.implode(':', array_keys($upvals)):'').' N:'.implode(':', $upvals);
       $return = `$update_cmd 2>&1`;
     }
 
@@ -390,9 +423,11 @@ class rrdstat {
   return $success;
   }
 
-  function fetch($cf = 'AVERAGE', $resolution = null, $start = null, $end = null) {
+  public function fetch($cf = 'AVERAGE', $resolution = null, $start = null, $end = null) {
     // fetch data from a RRD
-    if (!in_array($this->status, array('ok','readonly'))) { trigger_error('Error: rrd status is '.$this->status, E_USER_WARNING); return false; }
+    if (!in_array($this->status, array('ok','readonly'))) {
+      trigger_error('Error: rrd status is '.$this->status, E_USER_WARNING); return false;
+    }
 
     if (!in_array($cf, array('AVERAGE','MIN','MAX','LAST'))) { $cf = 'AVERAGE'; }
     if (!is_numeric($resolution)) { $resolution = $this->rrd_step; }
@@ -403,7 +438,8 @@ class rrdstat {
     elseif ($start < 0) { $start += $end; }
     $start = intval($start/$resolution)*$resolution;
 
-    $fetch_cmd = 'rrdtool fetch '.$this->rrd_file.' '.$cf.' --resolution '.$resolution.' --start '.$start.' --end '.$end;
+    $fetch_cmd = $this->rrdtool_bin.' fetch '.$this->rrd_file.' '.$cf.' --resolution '.$resolution
+                 .' --start '.$start.' --end '.$end;
     $return = `$fetch_cmd 2>&1`;
 
     if (strpos($return, 'ERROR') !== false) {
@@ -432,25 +468,28 @@ class rrdstat {
   return $fresult;
   }
 
-  function last_update() {
+  public function last_update() {
     // fetch time of last update in this RRD file
     static $last_update;
     if (!isset($last_update) && in_array($this->status, array('ok','readonly'))) {
-      $last_cmd = 'rrdtool last '.$this->rrd_file;
+      $last_cmd = $this->rrdtool_bin.' last '.$this->rrd_file;
       $return = trim(`$last_cmd 2>&1`);
       $last_update = is_numeric($return)?$return:null;
     }
   return isset($last_update)?$last_update:null;
   }
 
-  function graph($timeframe = 'day', $sub = null, $extra = null) {
+  public function graph($timeframe = 'day', $sub = null, $extra = null) {
     // create a RRD graph
     static $gColors;
     if (!isset($gColors)) {
-      $gColors = array('#00CC00','#0000FF','#000000','#FF0000','#00FF00','#FFFF00','#FF00FF','#00FFFF','#808080','#800000','#008000','#000080','#808000','#800080','#008080','#C0C0C0');
+      $gColors = array('#00CC00','#0000FF','#000000','#FF0000','#00FF00','#FFFF00','#FF00FF','#00FFFF',
+                       '#808080','#800000','#008000','#000080','#808000','#800080','#008080','#C0C0C0');
     }
 
-    if (!in_array($this->status, array('ok','readonly','graphonly'))) { trigger_error('Error: rrd status is '.$this->status, E_USER_WARNING); return false; }
+    if (!in_array($this->status, array('ok','readonly','graphonly'))) {
+      trigger_error('Error: rrd status is '.$this->status, E_USER_WARNING); return false;
+    }
 
     // assemble configuration
     $gconf = (array)$extra;
@@ -485,31 +524,32 @@ class rrdstat {
     $graphrows = array(); $specialrows = array(); $gC = 0;
     $gDefs = ''; $gGraphs = ''; $addSpecial = '';
 
+    // the default size for the graph area has a width of 400px, so use 400 slices by default
     if ($timeframe == 'day') {
-      $duration = isset($gconf['duration'])?$gconf['duration']:30*3600; // 30 hours
       $slice = isset($gconf['slice'])?$gconf['slice']:300; // 5 minutes
+      $duration = isset($gconf['duration'])?$gconf['duration']:400*$slice; // 33.33 hours
       // vertical lines at day borders
       $addSpecial .= ' VRULE:'.strtotime(date('Y-m-d')).'#FF0000';
       $addSpecial .= ' VRULE:'.strtotime(date('Y-m-d').' -1 day').'#FF0000';
       if (!isset($gconf['grid_x'])) { $gconf['grid_x'] = 'HOUR:1:HOUR:6:HOUR:2:0:%-H'; }
     }
     elseif ($timeframe == 'week') {
-      $duration = isset($gconf['duration'])?$gconf['duration']:8*86400; // 8 days
       $slice = isset($gconf['slice'])?$gconf['slice']:1800; // 30 minutes
+      $duration = isset($gconf['duration'])?$gconf['duration']:400*$slice; // 8.33 days
       // vertical lines at week borders
       $addSpecial .= ' VRULE:'.strtotime(date('Y-m-d').' '.(-date('w')+1).' day').'#FF0000';
       $addSpecial .= ' VRULE:'.strtotime(date('Y-m-d').' '.(-date('w')-6).' day').'#FF0000';
     }
     elseif ($timeframe == 'month') {
-      $duration = isset($gconf['duration'])?$gconf['duration']:36*86400; // 36 days
       $slice = isset($gconf['slice'])?$gconf['slice']:7200; // 2 hours
+      $duration = isset($gconf['duration'])?$gconf['duration']:400*$slice; // 33.33 days
       // vertical lines at month borders
       $addSpecial .= ' VRULE:'.strtotime(date('Y-m-01')).'#FF0000';
       $addSpecial .= ' VRULE:'.strtotime(date('Y-m-01').' -1 month').'#FF0000';
     }
     elseif ($timeframe == 'year') {
-      $duration = isset($gconf['duration'])?$gconf['duration']:396*86400; // 365+31 days
       $slice = isset($gconf['slice'])?$gconf['slice']:86400; // 1 day
+      $duration = isset($gconf['duration'])?$gconf['duration']:400*$slice; // 400 days
       // vertical lines at month borders
       $addSpecial .= ' VRULE:'.strtotime(date('Y-01-01 12:00:00')).'#FF0000';
       $addSpecial .= ' VRULE:'.strtotime(date('Y-01-01 12:00:00').' -1 year').'#FF0000';
@@ -519,65 +559,85 @@ class rrdstat {
       $slice = isset($gconf['slice'])?$gconf['slice']:$this->rrd_step; // whatever our step is
     }
 
-    if (isset($gconf['rows']) && count($gconf['rows'])) {
-      foreach ($gconf['rows'] as $erow) {
-        if (isset($erow['name']) && strlen($erow['name'])) {
-          if (!isset($erow['scale']) && isset($gconf['scale'])) { $erow['scale'] = $gconf['scale']; }
-          $grow = array();
-          $grow['dType'] = isset($erow['dType'])?$erow['dType']:'DEF';
-          $grow['name'] = $erow['name'].(isset($erow['scale'])?'_tmp':'');
-          if ($grow['dType'] == 'DEF') {
-            $grow['dsname'] = isset($erow['dsname'])?$erow['dsname']:$erow['name'];
-            if (isset($erow['dsfile'])) { $grow['dsfile'] = $erow['dsfile']; }
-            $grow['cf'] = isset($erow['cf'])?$erow['cf']:'AVERAGE';
-          }
-          else {
-            $grow['rpn_expr'] = isset($erow['rpn_expr'])?$erow['rpn_expr']:'0';
-          }
-          if (isset($erow['scale'])) {
-            $graphrows[] = $grow;
-            $grow = array();
-            $grow['dType'] = 'CDEF';
-            $grow['name'] = $erow['name'];
-            $grow['rpn_expr'] = $erow['name'].'_tmp,'.$erow['scale'].',*';
-          }
-          $grow['gType'] = isset($erow['gType'])?$erow['gType']:'LINE1';
-          $grow['color'] = isset($erow['color'])?$erow['color']:$gColors[$gC++];
-          $grow['color_bg'] = isset($erow['color_bg'])?$erow['color_bg']:'';
-          if ($gC >= count($gColors)) { $gC = 0; }
-          if (isset($erow['legend'])) {
-            $grow['legend'] = $erow['legend'];
-            if (!isset($gconf['show_legend'])) { $gconf['show_legend'] = true; }
+    $use_gcrows = (isset($gconf['rows']) && count($gconf['rows']));
+    if ($use_gcrows) { $grow_def =& $gconf['rows']; }
+    else { $grow_def =& $this->rrd_fields; }
+    foreach ($grow_def as $key=>$erow) {
+      if (isset($erow['name']) && strlen($erow['name'])) {
+        if (!isset($erow['scale']) && isset($gconf['scale'])) { $erow['scale'] = $gconf['scale']; }
+        if (!isset($erow['scale_time_src']) && isset($gconf['scale_time_src'])) {
+          $erow['scale_time_src'] = $gconf['scale_time_src'];
+        }
+        if (!isset($erow['scale_time_tgt']) && isset($gconf['scale_time_tgt'])) {
+          $erow['scale_time_tgt'] = $gconf['scale_time_tgt'];
+        }
+        foreach (array('scale_time_src','scale_time_tgt') as $st) {
+          if (!isset($erow[$st]) || !is_numeric($erow[$st])) {
+            switch (@$erow[$st]) {
+              case 'dyn':
+              case 'auto':
+                $erow[$st] = $slice;
+                break;
+              case 'day':
+                $erow[$st] = 24*3600;
+                break;
+              case '2hr':
+              case '2hours':
+                $erow[$st] = 7200;
+                break;
+              case 'hr':
+              case 'hour':
+                $erow[$st] = 3600;
+                break;
+              case '30min':
+                $erow[$st] = 1800;
+                break;
+              case '5min':
+                $erow[$st] = 300;
+                break;
+              case 'min':
+                $erow[$st] = 60;
+                break;
+              case 's':
+              case 'sec':
+              default:
+                $erow[$st] = 1;
+                break;
+            }
           }
-          if (isset($erow['stack'])) { $grow['stack'] = ($erow['stack'] == true); }
-          if (isset($erow['desc'])) { $grow['desc'] = $erow['desc']; }
-          if (isset($erow['legend_long'])) { $grow['legend_long'] = $erow['legend_long']; }
-          $graphrows[] = $grow;
         }
-      }
-    }
-    else {
-      foreach ($this->rrd_fields as $key=>$ds) {
+        $scale_time_factor = $erow['scale_time_tgt']/$erow['scale_time_src'];
+        if ($scale_time_factor != 1) { $erow['scale'] = (isset($erow['scale'])?$erow['scale']:1)*$scale_time_factor; }
         $grow = array();
-        $grow['dType'] = 'DEF';
-        $grow['name'] = $ds['name'].(isset($gconf['scale'])?'_tmp':'');
-        $grow['dsname'] = $ds['name'];
-        $grow['cf'] = 'AVERAGE';
-        if (isset($gconf['scale'])) {
+        $grow['dType'] = ($use_gcrows && isset($erow['dType']))?$erow['dType']:'DEF';
+        $grow['name'] = $erow['name'].(isset($erow['scale'])?'_tmp':'');
+        if ($grow['dType'] == 'DEF') {
+          $grow['dsname'] = ($use_gcrows && isset($erow['dsname']))?$erow['dsname']:$erow['name'];
+          if ($use_gcrows && isset($erow['dsfile'])) { $grow['dsfile'] = $erow['dsfile']; }
+          $grow['cf'] = ($use_gcrows && isset($erow['cf']))?$erow['cf']:'AVERAGE';
+        }
+        else {
+          $grow['rpn_expr'] = isset($erow['rpn_expr'])?$erow['rpn_expr']:'0';
+        }
+        if (isset($erow['scale'])) {
           $graphrows[] = $grow;
           $grow = array();
           $grow['dType'] = 'CDEF';
-          $grow['name'] = $ds['name'];
-          $grow['rpn_expr'] = $ds['name'].'_tmp,'.$gconf['scale'].',*';
+          $grow['name'] = $erow['name'];
+          $grow['rpn_expr'] = $erow['name'].'_tmp,'.$erow['scale'].',*';
         }
-        $grow['gType'] = ((count($this->rrd_fields)==2) && ($key==0))?'AREA':'LINE1';
-        $grow['color'] = $gColors[$gC++]; if ($gC >= count($gColors)) { $gC = 0; }
-        if (isset($ds['legend'])) {
-          $grow['legend'] = $ds['legend'];
+        if ($use_gcrows) { $grow['gType'] = isset($erow['gType'])?$erow['gType']:'LINE1'; }
+        else { $grow['gType'] = ((count($grow_def)==2) && ($key==0))?'AREA':'LINE1'; }
+        $grow['color'] = isset($erow['color'])?$erow['color']:$gColors[$gC++];
+        $grow['color_bg'] = isset($erow['color_bg'])?$erow['color_bg']:'';
+        if ($gC >= count($gColors)) { $gC = 0; }
+        if (isset($erow['legend'])) {
+          $grow['legend'] = $erow['legend'];
           if (!isset($gconf['show_legend'])) { $gconf['show_legend'] = true; }
         }
-        if (isset($ds['desc'])) { $grow['desc'] = $ds['desc']; }
-        if (isset($ds['legend_long'])) { $grow['legend_long'] = $ds['legend_long']; }
+        if (isset($erow['stack'])) { $grow['stack'] = ($erow['stack'] == true); }
+        if (isset($erow['desc'])) { $grow['desc'] = $erow['desc']; }
+        if (isset($erow['legend_long'])) { $grow['legend_long'] = $erow['legend_long']; }
         $graphrows[] = $grow;
       }
     }
@@ -588,16 +648,23 @@ class rrdstat {
         $srow['sType'] = isset($crow['sType'])?$crow['sType']:'COMMENT';
         if ($grow['sType'] != 'COMMENT') {
           // XXX: use line below and remove cf var once we have rrdtol 1.2
-          // $srow['name'] = $crow['name'].(isset($crow['cf'])?'_'.$crow['cf']:'');
-          $srow['name'] = $crow['name'];
-          $srow['cf'] = isset($crow['cf'])?$crow['cf']:'AVERAGE';
+          if ($this->rrd_version() >= '1.2') {
+            $srow['name'] = $crow['name'].(isset($crow['cf'])?'_'.$crow['cf']:'');
+          }
+          else {
+            $srow['name'] = $crow['name'];
+            $srow['cf'] = isset($crow['cf'])?$crow['cf']:'AVERAGE';
+          }
           if (isset($crow['cf'])) {
-            // XXX: use line below once we have rrdtol 1.2
-            // $graphrows[] = array('dType'=>'VDEF', 'name'=>$srow['name'].'_'.$crow['cf'], 'rpn_expr'=>$srow['name'].','.$crow['cf']);
+            if ($this->rrd_version() >= '1.2') {
+              $graphrows[] = array('dType'=>'VDEF', 'name'=>$srow['name'].'_'.$crow['cf'],
+                                   'rpn_expr'=>$srow['name'].','.$crow['cf']);
+            }
           }
           elseif (isset($crow['rpn_expr'])) {
-            // XXX: does only work with rrdtool 1.2
-            $graphrows[] = array('dType'=>'VDEF', 'name'=>$srow['name'], 'rpn_expr'=>$crow['rpn_expr']);
+            if ($this->rrd_version() >= '1.2') {
+              $graphrows[] = array('dType'=>'VDEF', 'name'=>$srow['name'], 'rpn_expr'=>$crow['rpn_expr']);
+            }
           }
         }
         $srow['text'] = isset($crow['text'])?$crow['text']:'';
@@ -609,12 +676,25 @@ class rrdstat {
       foreach ($graphrows as $grow) {
         if (isset($grow['gType']) && strlen($grow['gType'])) {
           $textprefix = isset($grow['desc'])?$grow['desc']:(isset($grow['legend'])?$grow['legend']:$grow['name']);
-          // XXX: use lines below once we have rrdtol 1.2
-          // $graphrows[] = array('dType'=>'VDEF', 'name'=>$grow['name'].'_last', 'rpn_expr'=>$grow['name'].',LAST');
-          // $specialrows[] = array('sType'=>'PRINT', 'name'=>$grow['name'].'_last', 'text'=>'%3.2lf%s');
-          $specialrows[] = array('sType'=>'PRINT', 'name'=>$grow['name'], 'cf'=>'MAX', 'text'=>$textprefix.'|'.dgettext($td, 'Maximum').'|%.2lf%s');
-          $specialrows[] = array('sType'=>'PRINT', 'name'=>$grow['name'], 'cf'=>'AVERAGE', 'text'=>$textprefix.'|'.dgettext($td, 'Average').'|%.2lf%s');
-          $specialrows[] = array('sType'=>'PRINT', 'name'=>$grow['name'], 'cf'=>'LAST', 'text'=>$textprefix.'|'.dgettext($td, 'Current').'|%.2lf%s');
+          if ($this->rrd_version() >= '1.2') {
+            $graphrows[] = array('dType'=>'VDEF', 'name'=>'_'.$grow['name'].'__max', 'rpn_expr'=>$grow['name'].',MAXIMUM');
+            $specialrows[] = array('sType'=>'PRINT', 'name'=>'_'.$grow['name'].'__max',
+                                   'text'=>$textprefix.'|'.dgettext($td, 'Maximum').'|%.2lf%s');
+            $graphrows[] = array('dType'=>'VDEF', 'name'=>'_'.$grow['name'].'__avg', 'rpn_expr'=>$grow['name'].',AVERAGE');
+            $specialrows[] = array('sType'=>'PRINT', 'name'=>'_'.$grow['name'].'__avg',
+                                   'text'=>$textprefix.'|'.dgettext($td, 'Average').'|%.2lf%s');
+            $graphrows[] = array('dType'=>'VDEF', 'name'=>'_'.$grow['name'].'__last', 'rpn_expr'=>$grow['name'].',LAST');
+            $specialrows[] = array('sType'=>'PRINT', 'name'=>'_'.$grow['name'].'__last',
+                                   'text'=>$textprefix.'|'.dgettext($td, 'Current').'|%.2lf%s');
+          }
+          else {
+            $specialrows[] = array('sType'=>'PRINT', 'name'=>$grow['name'], 'cf'=>'MAX',
+                                   'text'=>$textprefix.'|'.dgettext($td, 'Maximum').'|%.2lf%s');
+            $specialrows[] = array('sType'=>'PRINT', 'name'=>$grow['name'], 'cf'=>'AVERAGE',
+                                   'text'=>$textprefix.'|'.dgettext($td, 'Average').'|%.2lf%s');
+            $specialrows[] = array('sType'=>'PRINT', 'name'=>$grow['name'], 'cf'=>'LAST',
+                                   'text'=>$textprefix.'|'.dgettext($td, 'Current').'|%.2lf%s');
+          }
         }
       }
     }
@@ -628,14 +708,22 @@ class rrdstat {
       if (($gconf['height'] <= 32) && isset($gconf['thumb']) && ($gconf['thumb'])) { $gOpts .= ' --only-graph'; }
     }
     if (!isset($gconf['show_legend']) || (!$gconf['show_legend'])) { $gOpts .= ' --no-legend'; }
+    if (isset($gconf['logarithmic']) && $gconf['logarithmic']) { $gOpts .= ' --logarithmic'; }
     if (isset($gconf['min_y'])) { $gOpts .= ' --lower-limit '.$gconf['min_y']; }
     if (isset($gconf['max_y'])) { $gOpts .= ' --upper-limit '.$gconf['max_y']; }
     if (isset($gconf['fix_scale_y']) && $gconf['fix_scale_y']) { $gOpts .= ' --rigid'; }
     if (isset($gconf['grid_x'])) { $gOpts .= ' --x-grid '.$gconf['grid_x']; }
     if (isset($gconf['grid_y'])) { $gOpts .= ' --y-grid '.$gconf['grid_y']; }
+    if (isset($gconf['gridfit']) && (!$gconf['gridfit'])) { $gOpts .= ' --no-gridfit'; }
+    if (isset($gconf['calc_scale_y']) && $gconf['calc_scale_y']) { $gOpts .= ' --alt-autoscale'; }
+    if (isset($gconf['calc_max_y']) && $gconf['calc_max_y']) { $gOpts .= ' --alt-autoscale-max'; }
     if (isset($gconf['units_exponent'])) { $gOpts .= ' --units-exponent '.$gconf['units_exponent']; }
     if (isset($gconf['units_length'])) { $gOpts .= ' --units-length '.$gconf['units_length']; }
-    if (!isset($gconf['force_recreate']) || (!$gconf['force_recreate'])) { $gOpts .= ' --lazy'; }
+    if (($this->rrd_version() < '1.2') || !count($specialrows)) {
+      // lazy graphics omit all print reporting in RRDtool 1.2!
+      // --> so don't use them there when we want to print stuff
+      if (!isset($gconf['force_recreate']) || (!$gconf['force_recreate'])) { $gOpts .= ' --lazy'; }
+    }
     if (isset($gconf['force_color']) && is_array($gconf['force_color'])) {
       foreach ($gconf['force_color'] as $ctag=>$cval) { $gOpts .= ' --color '.$ctag.$cval; }
     }
@@ -655,33 +743,45 @@ class rrdstat {
       }
       if (isset($grow['gType']) && strlen($grow['gType'])) {
         // XXX: change from STACK type to STACK flag once we have rrdtool 1.2
-        if (isset($grow['stack']) && $grow['stack']) { $grow['gType'] = 'STACK'; }
+        if ($this->rrd_version() < '1.2') {
+          // rrdtool 1.0 only know STACK type
+          if (isset($grow['stack']) && $grow['stack']) { $grow['gType'] = 'STACK'; }
+        }
         $gGraphs .= ' '.$grow['gType'].':'.$grow['name'].$grow['color'];
         if (isset($grow['legend'])) { $gGraphs .= ':'.$this->text_quote($grow['legend']); }
-        // XXX: remove above STACK if-command and uncomment the one below once we have rrdtool 1.2
-        //if (isset($grow['stack']) && $grow['stack']) { $gGraphs .= ':STACK'; }
+        if ($this->rrd_version() >= '1.2') {
+          // rrdtool 1.2 and above have STACK flag
+          if (isset($grow['stack']) && $grow['stack']) { $gGraphs .= ':STACK'; }
+        }
       }
     }
 
     foreach ($specialrows as $srow) {
       $addSpecial .= ' '.$srow['sType'];
-      // XXX: eliminate cf once we have rrdtool 1.2
-      // $addSpecial .= ($grow['sType']!='COMMENT')?':'.$grow['name']:'');
-      $addSpecial .= (($srow['sType']!='COMMENT')?':'.$srow['name'].':'.$srow['cf']:'');
+      if ($this->rrd_version() >= '1.2') {
+        $addSpecial .= (($srow['sType']!='COMMENT')?':'.$srow['name']:'');
+      }
+      else {
+        $addSpecial .= (($srow['sType']!='COMMENT')?':'.$srow['name'].':'.$srow['cf']:'');
+      }
       $addSpecial .= ':'.$this->text_quote($srow['text']);
     }
 
-    $graph_cmd = 'rrdtool graph '.str_replace('*', '\*', $fname.$gOpts.$gDefs.$gGraphs.$addSpecial);
+    $graph_cmd = $this->rrdtool_bin.' graph '.str_replace('*', '\*', $fname.$gOpts.$gDefs.$gGraphs.$addSpecial);
     $return = `$graph_cmd 2>&1`;
 
     if (strpos($return, 'ERROR') !== false) {
       trigger_error($this->rrd_file.' - rrd graph error: '.$return, E_USER_WARNING);
-      $return = $graph_cmd."\n\n".$return;
+      $return = 'command:'.$graph_cmd."\n\n".$return;
+    }
+    if (0) {
+      // debug output
+      $return = 'command:'.$graph_cmd."\n\n".$return;
     }
     $legendlines = '';
     foreach ($graphrows as $grow) {
       $legendline = isset($grow['desc'])?$grow['desc']:(isset($grow['legend'])?$grow['legend']:$grow['name']);
-      $legendline .= '|'.$grow['color'];
+      $legendline .= '|'.@$grow['color'];
       $legendline .= '|'.(isset($grow['color_bg'])?$grow['color_bg']:'');
       $legendline .= '|'.(isset($grow['legend_long'])?$grow['legend_long']:'');
       $legendlines .= 'legend:'.$legendline."\n";
@@ -690,18 +790,23 @@ class rrdstat {
   return $return;
   }
 
-  function graph_plus($timeframe = 'day', $sub = null, $extra = null) {
+  public function graph_plus($timeframe = 'day', $sub = null, $extra = null) {
     // create a RRD graph and return meta info as a ready-to-use array
     $gmeta = array('filename'=>null,'legends_long'=>false,'default_colorize'=>false);
     $ret = $this->graph($timeframe, $sub, $extra);
-    if (strpos($ret, "\n\n") !== false) { $gmeta['graph_cmd'] = substr($ret, 0, strpos($ret, "\n\n")); $ret = substr($ret, strpos($ret, "\n\n")+2); }
-    else { $gmeta['graph_cmd'] = null; }
+    if (0) {
+      // debug output
+      $gmeta['ret'] = $ret;
+    }
     $grout = explode("\n", $ret);
     foreach ($grout as $gline) {
-      if (preg_match('/^file:(.+)$/', $gline, $regs)) {
+      if (preg_match('/^command:(.+)$/', $gline, $regs)) {
+        $gmeta['graph_cmd'] = $regs[1];
+      }
+      elseif (preg_match('/^file:(.+)$/', $gline, $regs)) {
         $gmeta['filename'] = $regs[1];
       }
-      elseif (preg_match('/^legend:([^\|]+)\|([^|]+)\|([^\|]*)\|(.*)$/', $gline, $regs)) {
+      elseif (preg_match('/^legend:([^\|]+)\|([^|]*)\|([^\|]*)\|(.*)$/', $gline, $regs)) {
         $gmeta['legend'][$regs[1]] = array('color'=>$regs[2], 'color_bg'=>$regs[3], 'desc_long'=>$regs[4]);
         if (strlen($regs[4])) { $gmeta['legends_long'] = true; }
         if (strlen($regs[3]) || strlen($regs[4])) { $gmeta['default_colorize'] = true; }
@@ -725,7 +830,7 @@ class rrdstat {
   return $gmeta;
   }
 
-  function page($sub = null, $page_extras = null, $graph_extras = null) {
+  public function page($sub = null, $page_extras = null, $graph_extras = null) {
     // create a (HTML) page and return it in a string
 
     // assemble configuration
@@ -751,9 +856,10 @@ class rrdstat {
   return $return;
   }
 
-  function simple_html($sub = null, $page_extras = null, $graph_extras = null) {
+  public function simple_html($sub = null, $page_extras = null, $graph_extras = null) {
     // create a simple (MRTG-like) HTML page and return it in a string
     // XXX: this is here temporarily for compat only, it's preferred to use page()!
+    trigger_error(__CLASS__.'::'.__METHOD__.' is deprecated, use page() instead.', E_USER_NOTICE);
 
     // assemble configuration
     $pconf = (array)$page_extras;
@@ -765,31 +871,31 @@ class rrdstat {
   return $this->page_simple($pconf, $graph_extras);
   }
 
-  function page_index($pconf) {
+  private function page_index($pconf) {
     // create a bare, very simple index list HTML page and return it in a string
     $td = $this->mod_textdomain;
     $ptitle = isset($pconf['title_page'])?$pconf['title_page']:dgettext($td, 'RRD statistics index');
 
-    $out = '<html><head>';
-    $out .= '<title>'.$ptitle.'</title>';
-    $out .= '<style>';
+    $out = '<html><head>'."\n";
+    $out .= '<title>'.$ptitle.'</title>'."\n";
+    $out .= '<style type="text/css">'."\n";
     if (isset($pconf['style_base'])) { $out .= $pconf['style_base']; }
     else {
-      $out .= 'h1 { font-weight: bold; font-size: 1.5em; }';
-      $out .= '.footer { font-size: 0.75em; margin: 0.5em 0; }';
-      $out .= 'li.scanfile { font-style: italic; }';
+      $out .= 'h1 { font-weight: bold; font-size: 1.5em; }'."\n";
+      $out .= '.footer { font-size: 0.75em; margin: 0.5em 0; }'."\n";
+      $out .= 'li.scanfile { font-style: italic; }'."\n";
     }
     if (isset($pconf['style'])) { $out .= $pconf['style']; }
-    $out .= '</style>';
-    $out .= '</head>';
-    $out .= '<body>';
+    $out .= '</style>'."\n";
+    $out .= '</head>'."\n";
+    $out .= '<body>'."\n";
 
-    $out .= '<h1>'.$ptitle.'</h1>';
+    $out .= '<h1>'.$ptitle.'</h1>'."\n";
     if (isset($pconf['text_intro']) && strlen($pconf['text_intro'])) {
-      $out .= '<p class="intro">'.$pconf['text_intro'].'</p>';
+      $out .= '<p class="intro">'.$pconf['text_intro'].'</p>'."\n";
     }
     elseif (!isset($pconf['text_intro'])) {
-      $out .= '<p class="intro">'.dgettext($td, 'The following RRD stats are available:').'</p>';
+      $out .= '<p class="intro">'.dgettext($td, 'The following RRD stats are available:').'</p>'."\n";
     }
 
     $stats = $this->h_page_statsArray($pconf);
@@ -800,7 +906,7 @@ class rrdstat {
     if (isset($pconf['stats_url_add'])) { $sURL_add = $pconf['stats_url_add']; }
     else { $sURL_add = '&sub=%s'; }
 
-    $out .= '<ul class="indexlist">';
+    $out .= '<ul class="indexlist">'."\n";
     foreach ($stats as $stat) {
       $out .= '<li'.(isset($stat['class'])?' class="'.$stat['class'].'"':'').'>';
       $sURL = str_replace('%i', $stat['name'], $sURL_base);
@@ -817,37 +923,39 @@ class rrdstat {
         }
         $out .= ' <span="subs">('.implode(', ', $sprt).')</span>';
       }
-      $out .= '</li>';
+      $out .= '</li>'."\n";
     }
-    $out .= '</ul>';
+    $out .= '</ul>'."\n";
 
     $out .= $this->h_page_footer();
-    $out .= '</body></html>';
+    $out .= '</body></html>'."\n";
   return $out;
   }
 
-  function page_overview($pconf, $graph_extras = null) {
+  private function page_overview($pconf, $graph_extras = null) {
     // create an overview HTML page (including graphs) and return it in a string
     $td = $this->mod_textdomain;
     $ptitle = isset($pconf['title_page'])?$pconf['title_page']:dgettext($td, 'RRD statistics overview');
 
-    $out = '<html><head>';
-    $out .= '<title>'.$ptitle.'</title>';
-    $out .= '<style>';
+    $out = '<html><head>'."\n";
+    $out .= '<title>'.$ptitle.'</title>'."\n";
+    $out .= '<style type="text/css">'."\n";
     if (isset($pconf['style_base'])) { $out .= $pconf['style_base']; }
     else {
-      $out .= 'h1 { font-weight: bold; font-size: 1.5em; }';
-      $out .= 'h2 { font-weight: bold; font-size: 1em; margin: 0.5em 0; }';
-      $out .= '.footer { font-size: 0.75em; margin: 0.5em 0; }';
-      $out .= 'img.rrdgraph { border: none; }';
+      $out .= 'h1 { font-weight: bold; font-size: 1.5em; }'."\n";
+      $out .= 'h2 { font-weight: bold; font-size: 1em; margin: 0.5em 0; }'."\n";
+      $out .= '.footer { font-size: 0.75em; margin: 0.5em 0; }'."\n";
+      $out .= 'img.rrdgraph { border: none; }'."\n";
     }
     if (isset($pconf['style'])) { $out .= $pconf['style']; }
-    $out .= '</style>';
-    $out .= '</head>';
-    $out .= '<body>';
+    $out .= '</style>'."\n";
+    $out .= '</head>'."\n";
+    $out .= '<body>'."\n";
 
-    $out .= '<h1>'.$ptitle.'</h1>';
-    if (isset($pconf['text_intro'])) { $out .= '<p class="intro">'.$pconf['text_intro'].'</p>'; }
+    $out .= '<h1>'.$ptitle.'</h1>'."\n";
+    if (isset($pconf['text_intro']) && strlen($pconf['text_intro'])) {
+      $out .= '<p class="intro">'.$pconf['text_intro'].'</p>';
+    }
 
     $stats = $this->h_page_statsArray($pconf);
 
@@ -860,16 +968,16 @@ class rrdstat {
     $num_rows = is_numeric($pconf['num_rows'])?$pconf['num_rows']:2;
     $num_cols = ceil(count($stats)/$num_rows);
 
-    $out .= '<table class="overview">';
+    $out .= '<table class="overview">'."\n";
     for ($col = 0; $col < $num_cols; $col++) {
-      $out .= '<tr>';
+      $out .= '<tr>'."\n";
       for ($row = 0; $row < $num_rows; $row++) {
         $idx = $col * $num_rows + $row;
-        $out .= '<td>';
+        $out .= '<td>'."\n";
         if ($idx < count($stats)) {
-          list($sname, $s_psub) = explode('|', $stats[$idx]['name'], 2);
+          @list($sname, $s_psub) = explode('|', $stats[$idx]['name'], 2);
           $s_psname = 'page'.(isset($s_psub)?'.'.$s_psub:'');
-          $g_sub = $this->config_all[$sname][$s_psname]['graph_sub'];
+          $g_sub = @$this->config_all[$sname][$s_psname]['graph_sub'];
 
           if (isset($this->config_all[$sname][$s_psname]['title_page'])) {
             $s_ptitle = $this->config_all[$sname][$s_psname]['title_page'];
@@ -878,10 +986,12 @@ class rrdstat {
             $s_ptitle = $this->config_all[$sname]['page']['title_page'];
           }
           else {
-            $s_ptitle = isset($s_psub)?sprintf(dgettext($td, '%s (%s) statistics'), $sname, $s_psub):sprintf(dgettext($td, '%s statistics'), $sname);
+            $s_ptitle = isset($s_psub)
+                        ?sprintf(dgettext($td, '%s (%s) statistics'), $sname, $s_psub)
+                        :sprintf(dgettext($td, '%s statistics'), $sname);
           }
           if (!isset($pconf['hide_titles']) || !$pconf['hide_titles']) {
-            $out .= '<h2>'.$s_ptitle.'</h2>';
+            $out .= '<h2>'.$s_ptitle.'</h2>'."\n";
           }
 
           $s_rrd = new rrdstat($this->config_all, $sname);
@@ -903,28 +1013,30 @@ class rrdstat {
             $out .= '<a href="'.$sURL.'">';
             $out .= '<img src="'.$gURL.'"';
             $out .= ' alt="'.$s_rrd->basename.(!is_null($g_sub)?' - '.$g_sub:'').' - '.$tframe.'" class="rrdgraph"';
-            if (isset($gmeta['width']) && isset($gmeta['height'])) { $out .= ' style="width:'.$gmeta['width'].'px;height:'.$gmeta['height'].'px;"'; }
-            $out .= '></a>';
+            if (isset($gmeta['width']) && isset($gmeta['height'])) {
+              $out .= ' style="width:'.$gmeta['width'].'px;height:'.$gmeta['height'].'px;"';
+            }
+            $out .= '></a>'."\n";
           }
           else {
-            $out .= sprintf(dgettext($td, 'RRD error: status is "%s"'), $s_rrd->status);
+            $out .= sprintf(dgettext($td, 'RRD error: status is "%s"'), $s_rrd->status)."\n";
           }
         }
         else {
           $out .= '&nbsp;';
         }
-        $out .= '</td>';
+        $out .= '</td>'."\n";
       }
-      $out .= '</tr>';
+      $out .= '</tr>'."\n";
     }
-    $out .= '</table>';
+    $out .= '</table>'."\n";
 
     $out .= $this->h_page_footer();
-    $out .= '</body></html>';
+    $out .= '</body></html>'."\n";
   return $out;
   }
 
-  function page_simple($pconf, $graph_extras = null) {
+  private function page_simple($pconf, $graph_extras = null) {
     // create a simple (MRTG-like) HTML page and return it in a string
     $td = $this->mod_textdomain;
 
@@ -936,34 +1048,37 @@ class rrdstat {
     $gtitle['year'] = isset($pconf['title_year'])?$pconf['title_year']:dgettext($td, 'Year overview (scaling 1 day)');
     $ltitle = isset($pconf['title_legend'])?$pconf['title_legend']:dgettext($td, 'Legend:');
 
-    $out = '<html><head>';
-    $out .= '<title>'.$ptitle.'</title>';
-    $out .= '<style>';
+    $out = '<html><head>'."\n";
+    $out .= '<title>'.$ptitle.'</title>'."\n";
+    $out .= '<style type="text/css">'."\n";
     if (isset($pconf['style_base'])) { $out .= $pconf['style_base']; }
     else {
-      $out .= 'h1 { font-weight: bold; font-size: 1.5em; }';
-      $out .= 'h2 { font-weight: bold; font-size: 1em; }';
-      $out .= '.gdata, .gvar, .ginfo { font-size: 0.75em; margin: 0.5em 0; }';
-      $out .= 'table.gdata, table.legend  { border: 1px solid gray; border-collapse: collapse; }';
-      $out .= 'table.gdata td, table.gdata th, ';
-      $out .= 'table.legend td, table.legend th { border: 1px solid gray; padding: 0.1em 0.2em; }';
-      $out .= 'div.legend { font-size: 0.75em; margin: 0.5em 0; }';
-      $out .= 'div.legend p { margin: 0; }';
-      $out .= '.footer { font-size: 0.75em; margin: 0.5em 0; }';
+      $out .= 'h1 { font-weight: bold; font-size: 1.5em; }'."\n";
+      $out .= 'h2 { font-weight: bold; font-size: 1em; }'."\n";
+      $out .= '.gdata, .gvar, .ginfo { font-size: 0.75em; margin: 0.5em 0; }'."\n";
+      $out .= 'table.gdata, table.legend  { border: 1px solid gray; border-collapse: collapse; }'."\n";
+      $out .= 'table.gdata td, table.gdata th, '."\n";
+      $out .= 'table.legend td, table.legend th { border: 1px solid gray; padding: 0.1em 0.2em; }'."\n";
+      $out .= 'div.legend { font-size: 0.75em; margin: 0.5em 0; }'."\n";
+      $out .= 'div.legend p { margin: 0; }'."\n";
+      $out .= '.footer { font-size: 0.75em; margin: 0.5em 0; }'."\n";
     }
     if (isset($pconf['style'])) { $out .= $pconf['style']; }
-    $out .= '</style>';
-    $out .= '</head>';
-    $out .= '<body>';
+    $out .= '</style>'."\n";
+    $out .= '</head>'."\n";
+    $out .= '<body>'."\n";
 
-    $out .= '<h1>'.$ptitle.'</h1>';
+    $out .= '<h1>'.$ptitle.'</h1>'."\n";
+    if (isset($pconf['text_intro']) && strlen($pconf['text_intro'])) {
+      $out .= '<p class="intro">'.$pconf['text_intro'].'</p>'."\n";
+    }
     if (!isset($pconf['show_update']) || $pconf['show_update']) {
       $out .= '<p class="last_up">';
       if (is_null($this->last_update())) { $up_time = dgettext($td, 'unknown'); }
       elseif (class_exists('baseutils')) { $up_time = baseutils::dateFormat($this->last_update(), 'short'); }
       else { $up_time = date('Y-m-d H:i:s', $this->last_update()); }
       $out .= sprintf(dgettext($td, 'Last Update: %s'), $up_time);
-      $out .= '</p>';
+      $out .= '</p>'."\n";
     }
 
     $g_sub = isset($pconf['graph_sub'])?$pconf['graph_sub']:null;
@@ -979,16 +1094,26 @@ class rrdstat {
         else {
           $gURL = $gmeta['filename'];
         }
-        $out .= '<div class="'.$tframe.'">';
-//         $out .= '<p>'.nl2br($ret).'</p>';
-        $out .= '<h2>'.$gtitle[$tframe].'</h2>';
+        $out .= '<div class="'.$tframe.'">'."\n";
+        if (0) {
+          // debug output
+          ob_start();
+          print_r($gmeta);
+          $buffer = ob_get_contents();
+          ob_end_clean();
+          $out .= '<p>'.nl2br($buffer).'</p>';
+        }
+        $out .= '<h2>'.$gtitle[$tframe].'</h2>'."\n";
         $out .= '<img src="'.$gURL.'"';
         $out .= ' alt="'.$this->basename.(!is_null($g_sub)?' - '.$g_sub:'').' - '.$tframe.'" class="rrdgraph"';
-        if (isset($gmeta['width']) && isset($gmeta['height'])) { $out .= ' style="width:'.$gmeta['width'].'px;height:'.$gmeta['height'].'px;"'; }
-        $out .= '>';
-        $colorize_data = (isset($pconf['data_colorize']) && $pconf['data_colorize']) || (!isset($pconf['data_colorize']) && $gmeta['default_colorize']);
+        if (isset($gmeta['width']) && isset($gmeta['height'])) {
+          $out .= ' style="width:'.$gmeta['width'].'px;height:'.$gmeta['height'].'px;"';
+        }
+        $out .= '>'."\n";
+        $colorize_data = (isset($pconf['data_colorize']) && $pconf['data_colorize']) ||
+                         (!isset($pconf['data_colorize']) && $gmeta['default_colorize']);
         if (isset($gmeta['data']) && count($gmeta['data'])) {
-          $out .= '<table class="gdata">';
+          $out .= '<table class="gdata">'."\n";
           foreach ($gmeta['data'] as $field=>$gdata) {
             $out .= '<tr><th';
             if ($colorize_data && isset($gmeta['legend'][$field])) {
@@ -1002,53 +1127,55 @@ class rrdstat {
             foreach ($gdata as $gkey=>$gval) {
               $out .= '<td><span class="gkey">'.$gkey.': </span>'.$gval.'</td>';
             }
-            $out .= '</tr>';
+            $out .= '</tr>'."\n";
           }
-          $out .= '</table>';
+          $out .= '</table>'."\n";
         }
         if (isset($gmeta['var']) && count($gmeta['var'])) {
           foreach ($gmeta['var'] as $gkey=>$gval) {
-            $out .= '<p class="gvar"><span class="gkey">'.$gkey.': </span>'.$gval.'</p>';
+            $out .= '<p class="gvar"><span class="gkey">'.$gkey.': </span>'.$gval.'</p>'."\n";
           }
         }
         if (isset($gmeta['info']) && count($gmeta['info'])) {
           foreach ($gmeta['info'] as $gval) {
-            $out .= '<p class="ginfo">'.$gval.'</p>';
+            $out .= '<p class="ginfo">'.$gval.'</p>'."\n";
           }
         }
-        $out .= '</div>';
+        $out .= '</div>'."\n";
       }
       if ($gmeta['legends_long'] && (!isset($pconf['show_legend']) || $pconf['show_legend'])) {
-        $out .= '<div class="legend">';
-        $out .= '<p>'.$ltitle.'</p>';
-        $out .= '<table class="legend">';
+        $out .= '<div class="legend">'."\n";
+        $out .= '<p>'.$ltitle.'</p>'."\n";
+        $out .= '<table class="legend">'."\n";
         foreach ($gmeta['legend'] as $field=>$legend) {
-          $out .= '<tr><th';
-          if ($colorize_data && isset($gmeta['legend'][$field])) {
-            $out .= ' style="color:'.$gmeta['legend'][$field]['color'].';';
-            if (strlen($gmeta['legend'][$field]['color_bg'])) {
-              $out .= 'background-color:'.$gmeta['legend'][$field]['color_bg'].';';
+          if (strlen($legend['desc_long'])) {
+            $out .= '<tr><th';
+            if ($colorize_data && isset($gmeta['legend'][$field])) {
+              $out .= ' style="color:'.$gmeta['legend'][$field]['color'].';';
+              if (strlen($gmeta['legend'][$field]['color_bg'])) {
+                $out .= 'background-color:'.$gmeta['legend'][$field]['color_bg'].';';
+              }
+              $out .= '"';
             }
-            $out .= '"';
+            $out .= '>'.$field.'</th>';
+            $out .= '<td>'.$legend['desc_long'].'</td>';
+            $out .= '</tr>'."\n";
           }
-          $out .= '>'.$field.'</th>';
-          $out .= '<td>'.$legend['desc_long'].'</td>';
-          $out .= '</tr>';
         }
-        $out .= '</table>';
-        $out .= '</div>';
+        $out .= '</table>'."\n";
+        $out .= '</div>'."\n";
       }
     }
     else {
-      $out .= sprintf(dgettext($td, 'RRD error: status is "%s"'), $this->status);
+      $out .= sprintf(dgettext($td, 'RRD error: status is "%s"'), $this->status)."\n";
     }
 
     $out .= $this->h_page_footer();
-    $out .= '</body></html>';
+    $out .= '</body></html>'."\n";
   return $out;
   }
 
-  function h_page_statsArray($pconf) {
+  private function h_page_statsArray($pconf) {
     // return array of stats to list on a page
     $stats = array();
     $snames = array(); $s_exclude = array(); $sfiles = array();
@@ -1088,16 +1215,20 @@ class rrdstat {
   return $stats;
   }
 
-  function h_page_footer() {
+  private function h_page_footer() {
     // return generic page footer
     $out = '<p class="footer">';
     $out .= sprintf(dgettext($this->mod_textdomain, 'Statistics created with %s using a library created by %s.'),
-                    '<a href="http://people.ee.ethz.ch/~oetiker/webtools/rrdtool/">RRDtool</a>',
+                    '<a href="http://oss.oetiker.ch/rrdtool/">RRDtool</a>',
                     '<a href="http://www.kairo.at/">KaiRo.at</a>');
-    $out .= '</p>';
+    $out .= '</p>'."\n";
   return $out;
   }
 
-  function text_quote($text) { return '"'.str_replace('"', '\"', str_replace(':', '\:', $text)).'"'; }
+  private function text_quote($text) {
+    $trans = array('"' => '\"', ':' => '\:');
+    $qtext = '"'.strtr($text, $trans).'"';
+  return $qtext;
+  }
 }
 ?>