1 files changed, 9 insertions, 9 deletions

diff --git a/library/Pbs/Graph.php b/library/Pbs/Graph.php
index 4ab1f79..7823a4b 100644
--- a/library/Pbs/Graph.php
+++ b/library/Pbs/Graph.php
@@ -34,20 +34,20 @@ class Pbs_Graph {
                          graph[ bgcolor=transparent ];
                          node [  style=filled fillcolor="#ffffffff" ];';
     if($this->level < 0)
-      { $this->graphstring . = '"'.$this->getGroupTitle($groupID).'"'; }
+      { $this->graphstring .= '"'.$this->getGroupTitle($groupID).'"'; }
     else
-      { $this->graphstring . = '"'.$this->getGroupTitle($groupID).'" [ fontcolor="#ffffffff", style=filled, fillcolor="#004A99FF"];'; }
+      { $this->graphstring .= '"'.$this->getGroupTitle($groupID).'" [ fontcolor="#ffffffff", style=filled, fillcolor="#004A99FF"];'; }
 
     if(count($this->childs) >= 1) {
       foreach($this->childs as $childID) {
         $this->edges[$groupID][$childID] = 1;
-        $this->graphstring . = '"'.$this->getGroupTitle($groupID).'" -> "'.$this->getGroupTitle($childID).'";'."\n";
+        $this->graphstring .= '"'.$this->getGroupTitle($groupID).'" -> "'.$this->getGroupTitle($childID).'";'."\n";
         $this->getChildGroups($childID);
       }
     }
     $this->getParentGroups($groupID);
     $this->getChildGroups($groupID);
-    $this->graphstring . = '}';
+    $this->graphstring .= '}';
 
     // for debugging
 # $fp = fopen($path.'thisgraph.dot', "w");
@@ -79,8 +79,8 @@ class Pbs_Graph {
 
     if(!file_exists($path.$md5.".png")) {
       $str =  'echo "';
-      $str . =  $this->graphstring;
-      $str . =  '" | dot -Tpng  >'.$path.$md5.".png";
+      $str .=  $this->graphstring;
+      $str .=  '" | dot -Tpng  >'.$path.$md5.".png";
       exec($str);
     }
 
@@ -109,7 +109,7 @@ class Pbs_Graph {
       // save the current groupID in level-list
 #$data[$level][] = $row['parentID'];
       if($this->edges[$row['parentID']][$groupID] != 1) {
-        $this->graphstring . = '"'.$this->getGroupTitle($row['parentID']).'" -> "'.$this->getGroupTitle($groupID).'";'."\n";
+        $this->graphstring .= '"'.$this->getGroupTitle($row['parentID']).'" -> "'.$this->getGroupTitle($groupID).'";'."\n";
         $this->edges[$row['parentID']][$groupID] = 1;
       }
       // get the function recursive an increase the level
@@ -130,11 +130,11 @@ class Pbs_Graph {
       // save the current groupID in level-list
 #$data[$level][] = $row['groupID'];
       if(@$this->edges[$groupID][$row['groupID']] != 1) {
-        $this->graphstring . = '"'.$this->getGroupTitle($groupID).'" -> "'.$this->getGroupTitle($row['groupID']).'";'."\n";
+        $this->graphstring .= '"'.$this->getGroupTitle($groupID).'" -> "'.$this->getGroupTitle($row['groupID']).'";'."\n";
         $this->edges[$groupID][$row['groupID']] = 1;
       }
       if($this->level >= $level) {
-        $this->graphstring . = '"'.$this->getGroupTitle($row['groupID']).'"'.' [ fontcolor="#ffffffff", style=filled, fillcolor="#004A99FF"];'."\n";
+        $this->graphstring .= '"'.$this->getGroupTitle($row['groupID']).'"'.' [ fontcolor="#ffffffff", style=filled, fillcolor="#004A99FF"];'."\n";
       }
       // get the function recursive an increase the level
       $this->getChildGroups($row['groupID'], $level + 1);