$graph = new PHPlot(500, 300);
$graph->SetDataType('data-data');
//Specify some data
$data = array(array('', 2000, 750), array('', 2010, 1700), array('', 2015, 2000), array('', 2020, 1800), array('', 2025, 1300), array('', 2030, 400));
$graph->SetDataValues($data);
//Specify plotting area details
$graph->SetPlotType('lines');
$graph->SetTitleFontSize('2');
$graph->SetTitle('Social Security trust fund asset estimates, in $ billions');
$graph->SetMarginsPixels(null, null, 40, null);
$graph->SetPlotAreaWorld(2000, 0, 2035, 2000);
$graph->SetPlotBgColor('white');
$graph->SetPlotBorderType('left');
$graph->SetBackgroundColor('white');
$graph->SetDataColors(array('red'), array('black'));
//Define the X axis
$graph->SetXLabel('Year');
$graph->SetXTickIncrement(5);
//Define the Y axis
$graph->SetYTickIncrement(500);
$graph->SetPrecisionY(0);
$graph->SetLightGridColor('blue');
//Disable image output
$graph->SetPrintImage(false);
//Draw the graph
$graph->DrawGraph();
$pdf = new PDF_MemImage();
$pdf->AddPage();
$pdf->GDImage($graph->img, 30, 20, 140);
$pdf->Output();