29.3. Step 2: Creating the graph
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## 29.3. Step 2: Creating the graph

We will use a basic accumulated bar graphs with a text scale and integer y-scale. The remainder of the script should be fairly self explanatory since this is a straightforward graph with no "tricks".

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    <?php
    /**
    * Class SpamGraph
    */
    class SpamGraph {
        private $iWidth, $iHeight;
        /**
        * Constructor
        *
        * @param $aWidth Width of generated graph
        * @param $aHeight Height of generated graph
        * @return SpamGraph
        */
        public function __construct($aWidth,$aHeight) {
            $this->iWidth = $aWidth;
            $this->iHeight = $aHeight;
        }
        /**
        * Create an accumulated bar graph
        *
        * @param string $aFile File to write graph to
        * @param array $aXData Date x-labels
        * @param array $aYData Spam data 1 (/dev/null)
        * @param array $aY2Data Spam data 2 (Spam folder)
        */
        public function Create($aFile,$aXData,$aYData,$aY2Data) {

            $graph = new Graph($this->iWidth,$this->iHeight);
            $graph->SetMargin(40,20,50,110);
            $graph->SetScale('textint');
            $graph->SetMarginColor('khaki2@0.6');

            $graph->legend->SetPos(0.5,0.97,'center','bottom');
            $graph->legend->SetLayout(10);
            $graph->legend->SetFillColor('white');
            $graph->legend->SetFont(FF_ARIAL,FS_NORMAL,10);

            $graph->title->Set('Identified spams');
            $graph->title->SetMargin(10);
            $graph->title->SetFont(FF_ARIAL,FS_NORMAL,14);

            $graph->subtitle->Set('(Updated: '.date('j M Y, H:i'.' T)'));
            $graph->subtitle->SetMargin(5);
            $graph->subtitle->SetFont(FF_ARIAL,FS_ITALIC,11);

            $graph->xaxis->SetTickLabels($aXData);
            $graph->xaxis->SetFont(FF_ARIAL,FS_NORMAL,8);
            $graph->xaxis->SetLabelAngle(45);

            $graph->yaxis->SetFont(FF_ARIAL,FS_NORMAL,10);
            $graph->yscale->SetGrace(10);

            $bar1 = new BarPlot($aYData);
            $bar1->SetFillGradient('darkred:1.2','darkred:0.7',GRAD_VER);
            $bar1->SetLegend('To "/dev/null"');

            $bar2 = new BarPlot($aY2Data);
            $bar2->SetFillGradient('orange','orange:0.7',GRAD_VER);
            $bar2->SetLegend('To Spam folder');

            $abar = new AccBarPlot(array($bar1,$bar2));
            $abar->value->Show();
            $abar->value->SetFormat('%d');
            $graph->Add($abar);
            $graph->Stroke($aFile);

            syslog(LOG_INFO,"Created spam image in $aFile.");
        }
    }

    ?>

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