1 files changed, 5 insertions, 5 deletions

diff --git a/plugin/apache.php b/plugin/apache.php
index 60371ed..667d052 100644
--- a/plugin/apache.php
+++ b/plugin/apache.php
@@ -25,7 +25,7 @@ switch ($obj->args['type']) {
                         'count' => '0000ff',
                 );
                 $obj->rrd_title = sprintf('Webserver Traffic%s',
-                        !isset($obj->args['pinstance']) ? ' ('.$obj->args['pinstance'].')' : '');
+                        !empty($obj->args['pinstance']) ? ' ('.$obj->args['pinstance'].')' : '');
                 $obj->rrd_vertical = 'Bytes/s';
         break;
         case 'apache_connections':
@@ -37,7 +37,7 @@ switch ($obj->args['type']) {
                         'count' => '00b000',
                 );
                 $obj->rrd_title = sprintf('Webserver Connections%s',
-                        !isset($obj->args['pinstance']) ? ' ('.$obj->args['pinstance'].')' : '');
+                        !empty($obj->args['pinstance']) ? ' ('.$obj->args['pinstance'].')' : '');
                 $obj->rrd_vertical = 'Conns/s';
         break;
         case 'apache_idle_workers':
@@ -49,7 +49,7 @@ switch ($obj->args['type']) {
                         'count' => '0000ff',
                 );
                 $obj->rrd_title = sprintf('Webserver Idle Workers%s',
-                        !isset($obj->args['pinstance']) ? ' ('.$obj->args['pinstance'].')' : '');
+                        !empty($obj->args['pinstance']) ? ' ('.$obj->args['pinstance'].')' : '');
                 $obj->rrd_vertical = 'Workers';
         break;
         case 'apache_requests':
@@ -61,7 +61,7 @@ switch ($obj->args['type']) {
                         'count' => '00b000',
                 );
                 $obj->rrd_title = sprintf('Webserver Requests%s',
-                        !isset($obj->args['pinstance']) ? ' ('.$obj->args['pinstance'].')' : '');
+                        !empty($obj->args['pinstance']) ? ' ('.$obj->args['pinstance'].')' : '');
                 $obj->rrd_vertical = 'Requests/s';
         break;
         case 'apache_scoreboard':
@@ -96,7 +96,7 @@ switch ($obj->args['type']) {
                         'idle_cleanup' => 'ffff00',
                 );
                 $obj->rrd_title = sprintf('Webserver Scoreboard%s',
-                        !isset($obj->args['pinstance']) ? ' ('.$obj->args['pinstance'].')' : '');
+                        !empty($obj->args['pinstance']) ? ' ('.$obj->args['pinstance'].')' : '');
                 $obj->rrd_vertical = 'Slots';
         break;
 }