Introduction to the use of jpgraph class library in php_PHP tutorial

// Create a Graph class, 350 is the width, 250 is the length, auto: means that the generated cache file name is the file name + extension of the file (.jpg .png .gif...)
$graph = new Graph(350,250,"auto");

//Set the scale type. The x-axis scale can be used as a straight-line scale for text labeling, and the y-axis is a straight-line scale.
　$graph->SetScale("textlin");

// Create a coordinate class and inject y-axis data into
$lineplot=new LinePlot($ydata);

// Set the y-axis connection line to blue
$lineplot->SetColor("blue");

// Inject the coordinate class into the icon class
$graph->Add($lineplot);

// Display graph
$graph->Stroke(); ?>