`<?php
// Gantt example
include ("../jpgraph.php");
include ("../jpgraph_gantt.php");
//
// The data for the graphs
//
$data = array(
array(0,ACTYPE_GROUP, "Phase 1", "2001-10-26","2001-11-23",''),
array(1,ACTYPE_NORMAL, " Label 1", "2001-10-26","2001-11-18",''),
array(2,ACTYPE_NORMAL, " Label 2", "2001-10-26","2001-11-16",''),
array(3,ACTYPE_NORMAL, " Label 3", "2001-11-20","2001-11-22",''),
array(4,ACTYPE_MILESTONE," Phase 1 Done", "2001-11-23",'M2') );
// The constrains between the activities
$constrains = array(array(1,2,CONSTRAIN_ENDSTART),
array(1,3,CONSTRAIN_STARTSTART),
array(3,4,CONSTRAIN_STARTSTART));
$progress = array(array(1,0.4));
// Create the basic graph
$graph = new GanttGraph();
$graph->title->Set("Example with grouping and constrains");
// Setup scale
$graph->ShowHeaders(GANTT_HYEAR | GANTT_HMONTH | GANTT_HDAY | GANTT_HWEEK);
$graph->scale->week->SetStyle(WEEKSTYLE_FIRSTDAYWNBR);
// Add the specified activities
$graph->CreateSimple($data,$constrains,$progress);
// .. and stroke the graph
$graph->Stroke();
?>
`