[JPGraph] ปรับค่าแกน x เป็นห่วงเวลา ดึงข้อมูลจาก DB ครับ

<?php // content="text/plain; charset=utf-8"


$host = "localhost";
$user = "root";
$pass = "root";
mysql_connect($host,$user,$pass) or die(mysql_error());

$sql =  "SELECT * 
FROM cpu_temp
WHERE device_id =  '1'
AND  `type_date` =  '4'
AND  `temp_date` = DATE( NOW( ) ) 
ORDER BY  `temp_time` ASC ";
$query = mysql_db_query("daily",$sql) or die(mysql_error());

$datax=array();
$temp=array();

while($data =  mysql_fetch_array($query))
{
$datax[] = $data['temp_time'];
$temp[] = $data['temp'];
}

 // content="text/plain; charset=utf-8"
require_once ('jpgraph/jpgraph.php');
require_once ('jpgraph/jpgraph_line.php');

$datay1 = $temp;

// Setup the graph
$graph = new Graph(1200,728);
$graph->SetScale("textlin");

$theme_class=new UniversalTheme;

$graph->SetTheme($theme_class);
$graph->img->SetAntiAliasing(false);
$graph->title->Set('Filled Y-grid');
$graph->SetBox(false);

$graph->img->SetAntiAliasing();

$graph->yaxis->HideZeroLabel();
$graph->yaxis->HideLine(false);
$graph->yaxis->HideTicks(false,false);

$graph->xaxis->SetFont(FF_ARIAL,FS_NORMAL,6);
$graph->xgrid->Show();
$graph->xgrid->SetLineStyle("solid");
$graph->xaxis->SetTickLabels($datax);
//$graph->xaxis->SetTickLabels(array('A','B','C','D'));
$graph->xgrid->SetColor('#E3E3E3');
$graph->xaxis->SetLabelAngle(90);

// Create the first line
$p1 = new LinePlot($datay1);
$graph->Add($p1);
$p1->SetColor("#6495ED");
$p1->SetLegend('Line 1');

$graph->legend->SetFrameWeight(1);

// Output line
$graph->Stroke();
?>