//include jpgraph library require_once ('jpgraph/jpgraph.php'); require_once ('jpgraph/jpgraph_line.php'); //create graph object $graph = new Graph(500,300); //set graph orientation and margin $graph->Set90AndMargin(40,40,40,40); //create line plot $lineplot = new LinePlot(array(1,2,3,4,5)); //add line plot to graph $graph->Add($lineplot); //display graph $graph->Stroke();This code sets the orientation of the graph to 90 degrees (landscape orientation) and adds a margin of 40 pixels to each side of the graph. It then creates a line plot and adds it to the graph. Finally, it displays the graph using the Stroke function. This function can also be found in other PHP graphing libraries, such as PHPlot and pChart. The specific syntax and implementation of the Set90AndMargin function may differ slightly depending on the library, but the basic functionality remains the same.