other bugs for php8

cluster_view.php

@@ -594,7 +594,7 @@ function get_load_heatmap($hosts_up, $host_regex, $metrics, $load_scale, $tpl_da
   if (array_key_exists($user_metricname, $metrics))
     $units = $metrics[$user_metricname]['UNITS'];
 } else {
-  if (array_key_exists($user_metricname, $metrics[key($metrics)]))
+  if ((!is_null($metrics[key($metrics)])) && array_key_exists($user_metricname, $metrics[key($metrics)]))
     if (isset($metrics[key($metrics)][$user_metricname]['UNITS']))
       $units = $metrics[key($metrics)][$user_metricname]['UNITS'];
   else
@@ -614,7 +614,7 @@ function get_load_heatmap($hosts_up, $host_regex, $metrics, $load_scale, $tpl_da
                                $user['ce'],
                                $conf['zoom_support'],
                                $conf['default_optional_graph_size'],
-                               $cluster[LOCALTIME],
+                               $cluster['LOCALTIME'],
                                $tpl_data);
 
   //////////////////////////////////////////////////////////////////////////////
@@ -761,7 +761,7 @@ function get_load_heatmap($hosts_up, $host_regex, $metrics, $load_scale, $tpl_da
   show_stacked_graphs($user['clustername'],
 		      $user['metricname'],
 		      $user['range'],
-		      $cluster[LOCALTIME],
+		      $cluster['LOCALTIME'],
 		      $user['host_regex'],
 		      $user['cs'],
 		      $user['ce'],

dwoo/Dwoo/Compiler.php

@@ -1820,7 +1820,7 @@ protected function parseFunction($in, $from, $to, $parsingParams = false, $curBl
 				if ($func === 'tif') {
 					$params[] = $tokens;
 				}
-				$output = call_user_func_array($funcCompiler, $params);
+				$output = call_user_func_array($funcCompiler, array_values($params));
 			} else {
 				array_unshift($params, '$this');
 				$params = self::implode_r($params);

meta_view.php

@@ -208,7 +208,11 @@
    # above the image. Not easy with template blocks.
    $cols=5;
    $i = 0;
-   $count=count($names);
+   if (is_null($names)) {
+      $count=0;
+   } else {
+      $count=count($names);
+   }
    while ($i < $count)
       {
          $snapnames = "";

stacked.php

@@ -30,8 +30,8 @@
   $command .= "TZ='" . sanitize($_SESSION['tz']) . "' ";
 
 $command .= $conf['rrdtool'] . " graph - $rrd_options -E";
-$command .= " --start '" . sanitize(${start}) . "'";
-$command .= " --end '" . sanitize(${end}) . "'";
+$command .= " --start '" . sanitize($start) . "'";
+$command .= " --end '" . sanitize($end) . "'";
 $command .= " --width 700";
 $command .= " --height 300";