/**
  * Display the graph
  *
  * @return void
  */
 function display()
 {
     $this->prepareGraph();
     //init x axis for advanced search display per month
     if ($this->filter == 'month') {
         if ($this->advsrch == 2) {
             $this->minmonth = $this->minmonth - 1;
             $this->maxmonth = $this->maxmonth - 1;
             $dateLocale = new DateLocale();
             $months = $dateLocale->GetShortMonth();
             for ($y = $this->minyear; $y <= $this->maxyear; $y++) {
                 $minm = 1;
                 if ($y == $this->minyear) {
                     $minm = $this->minmonth;
                 }
                 $maxm = 12;
                 if ($y == $this->maxyear) {
                     $maxm = $this->maxmonth;
                 }
                 for ($m = $minm; $m <= $maxm; $m++) {
                     $databarx[] = $months[$m % 12];
                 }
             }
             $this->graph->xaxis->SetTickLabels($databarx);
         } else {
             $dateLocale = new DateLocale();
             $allmonths = $dateLocale->GetMonth();
             $this->graph->xaxis->SetTickLabels($allmonths);
         }
     } elseif ($this->advsrch == 3) {
         for ($y = $this->minyear; $y <= $this->maxyear; $y++) {
             $minm = 1;
             if ($y == $this->minyear) {
                 $minm = $this->minmonth;
             }
             $maxm = 12;
             if ($y == $this->maxyear) {
                 $maxm = $this->maxmonth;
             }
             for ($m = $minm; $m <= $maxm; $m++) {
                 $mind = 1;
                 if ($m == $minm && $y == $this->minyear) {
                     $mind = $this->minday;
                 }
                 $maxd = date('t', mktime(0, 0, 0, $m, 1, $y));
                 if ($m == $maxm && $y == $this->maxyear) {
                     $maxd = $this->maxday;
                 }
                 for ($d = $mind; $d <= $maxd; $d++) {
                     if ($d == 1) {
                         $databarx[] = $d . '/' . date('F', mktime(0, 0, 0, $m, $d, $y));
                     } elseif ($d % 5 == 0) {
                         $databarx[] = $d;
                     } else {
                         $databarx[] = '';
                     }
                 }
             }
         }
         $this->graph->xaxis->SetLabelAngle(90);
         $this->graph->xaxis->SetTickLabels($databarx);
     }
     $this->graph->Stroke();
 }
<?php

// content="text/plain; charset=utf-8"
// Gantt example
require_once 'login.php';
//ini_set('intl.default_locale', 'it_IT');
require_once APPS_DIR . 'plugins/jpgraph/jpgraph.php';
require_once APPS_DIR . 'plugins/jpgraph/jpgraph_gantt.php';
//
// The data for the graphs
//
setlocale(LC_ALL, 'it_IT.utf8');
$dateLocale = new DateLocale();
// Use Swedish locale
$dateLocale->Set('it_IT.utf8');
$data = array(array(0, ACTYPE_GROUP, "Tempo Totale", "2011-12-13", "2012-02-12"), array(1, ACTYPE_NORMAL, "Istruttoria Preliminare", "2011-12-13", "2011-12-30"), array(2, ACTYPE_NORMAL, "Istruttoria Tecnica", "2011-12-30", "2012-01-18"), array(3, ACTYPE_NORMAL, "Istruttoria Amministrativa", "2012-01-18", "2012-01-30"), array(4, ACTYPE_MILESTONE, "Rilascio Titolo", "2012-02-09", 'RILASCIO TITOLO'));
// Create the basic graph
$graph = new GanttGraph();
$graph->title->Set("Scadenze Pratica n° 0125/2012");
// Setup scale
//$graph->ShowHeaders(GANTT_HYEAR | GANTT_HMONTH | GANTT_HDAY | GANTT_HWEEK);
$graph->scale->week->SetStyle(WEEKSTYLE_FIRSTDAY);
// Add the specified activities
$graph->CreateSimple($data);
// .. and stroke the graph
$graph->Stroke();
//phpinfo();
?>