[graph realtime ]เรื่องการอ่าน ค่า php ใน java script เพื่อใส่ค่าลง list ใน java script

<script type="text/javascript" >

$(function () {
    // we use an inline data source in the example, usually data would
    // be fetched from a server
    var data = [], totalPoints = 5;
    function getData() {
    
    if (data.length > 0)
            data = data.slice(1);
            document.write(data+ "<br>");
            while (data.length <= totalPoints) {
<?php
$oid=268435456+5;
$host = "10.255.206.11";
$snrDown1 = snmpget($host, "private", ".1.3.6.1.2.1.10.94.1.1.3.1.1.$oid");
$index1 = snmpget($host, "public", ".1.3.6.1.2.1.10.94.1.1.3.1.4.$oid");
$snr1 = snmpget($host, "public", ".1.3.6.1.2.1.10.94.1.1.3.1.4.$oid");
$snr1_1=ereg_replace("[^[:digit:]]","", $snr1 ) ;

echo 'data.push(' . $snr1_1 . ')' . "\n"; ?>

}
document.write(data+ "<br> ");
      
      
        // zip the generated y values with the x values
        var res = [];
        
        for (var i = 0; i < data.length; ++i)
          document.write(length+ "<br />");
            res.push([i, data[i]])
    
    document.write(i+ "<br />");
    //document.write(data[i]+ "<br />");
    document.write(res+ "<br /><br />");
  
        return res;
    }

    // setup control widget
    var updateInterval = 3000;
    $("#updateInterval").val(updateInterval).change(function () {
        var v = $(this).val();
        if (v && !isNaN(+v)) {
            updateInterval = +v;
            if (updateInterval < 1)
                updateInterval = 1;
            if (updateInterval > 200000)
                updateInterval = 200000;
            $(this).val("" + updateInterval);
        }
    });

    // setup plot
    var options = {
        series: { shadowSize: 0 }, // drawing is faster without shadows
        yaxis: { show : true },
        xaxis: { show: false }
    };
    var plot = $.plot($("#placeholder"), [ getData() ], options);

    function update() {
        
        plot.setData([ getData() ]);
        // since the axes don't change, we don't need to call plot.setupGrid()
        plot.draw();
        
        setTimeout(update, updateInterval);
        //window.location.href = 'readdbonly.php';
    }

    update();
});
</script>