$max_d_end = new CDate($end_date);
} else {
// find out DateRange from gant_arr
$min_d_start = new CDate();
$max_d_end = new CDate();
$d_start = new CDate();
$d_end = new CDate();
for ($i = 0, $i_cmp = count($gantt_arr); $i < $i_cmp; $i++) {
$a = $gantt_arr[$i][0];
$start = substr($a['task_start_date'], 0, 10);
$end = substr($a['task_end_date'], 0, 10);
$d_start->Date($start);
$d_end->Date($end);
if ($i == 0) {
$min_d_start = $d_start->duplicate();
$max_d_end = $d_end->duplicate();
} else {
if (Date::compare($min_d_start, $d_start) > 0) {
$min_d_start = $d_start->duplicate();
}
if (Date::compare($max_d_end, $d_end) < 0) {
$max_d_end = $d_end->duplicate();
}
}
}
}
// check day_diff and modify Headers
$day_diff = $min_d_start->dateDiff($max_d_end);
if ($day_diff > 240) {
//more than 240 days
$graph->ShowHeaders(GANTT_HYEAR | GANTT_HMONTH);
