gradlinefillex1.php
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<?php // content="text/plain; charset=utf-8"
require_once ("jpgraph/jpgraph.php");
require_once ("jpgraph/jpgraph_line.php");
 
$datay = array(20,15,33,5,17,35,22);
 
// Setup the graph
$graph = new Graph(400,200);
$graph->SetMargin(40,40,20,30);    
$graph->SetScale("intlin");
$graph->SetMarginColor('darkgreen@0.8');
 
$graph->title->Set('Gradient filled line plot');
$graph->yscale->SetAutoMin(0);
 
// Create the line
$p1 = new LinePlot($datay);
$p1->SetColor("blue");
$p1->SetWeight(0);
$p1->SetFillGradient('red','yellow');
 
$graph->Add($p1);
 
// Output line
$graph->Stroke();
 
?>