new to this and (almost) desperate. in below code i want to set $rows1['date'][] = $data['tanggal']; data as X-Axis in highchart :
 $(function () {
    var chart;
    $(document).ready(function() {
    getAjaxData(1);
    var val =  location.search.split('proyek=')[1]
    getAjaxData(val);  
    function getAjaxData(proyek){
    $.getJSON("src/json/data.php", {proyek: proyek}, function(json) {   
    chart = new Highcharts.Chart({
    chart: {
        renderTo: 'scurve-proyek',
        type: 'column'                    
    },
    title: {
        text: ''
    },
     credits: {
      enabled: false,
    },
    subtitle: {
        text: ''
    },
    yAxis: {
        min: 0,
        max: 100,
        tickInterval: 20,
        title: {
            text: ''
            },
    },
    xAxis: {
       type: 'datetime',
       labels: {
            formatter: function ( ){
                return Highcharts.dateFormat('%Y-%m-%d', this.value);
            },
        },
    },
    tooltip:{
         formatter: function() {
            return '<b>' + this.series.name + '</b><br/>' +
                Highcharts.numberFormat(this.y, 2) +' %';
          },
    },
    plotOptions: {
         column: {
            dataLabels: {
            enabled: true,
            format: '{point.y:,.2f}'+'%',
            }   
     },
    },
    series: json
    });
    });  
    };     
    });
});
my data.php :
<?php
header("Content-type: application/json");
require_once "database.php";
$db = new database();
$mysqli = $db->connect();
$proyek = $_GET['proyek'];
$sql = "SELECT fren_pr FROM data_proyek WHERE kode_proyek = '$proyek'";
$rows = array();
$rows['name'] = 'Rencana';
$rows['color'] = '#50B432';
$result = $mysqli->query($sql);
while ($data = $result->fetch_assoc()) {
    $rows['data'][] = array($data['fren_pr'],);
}
$sql = "SELECT freal_pr, tanggal FROM data_proyek WHERE kode_proyek = '$proyek'";
$rows1 = array();
$rows1['name'] = 'Realisasi';
$result = $mysqli->query($sql);
while ($data = $result->fetch_assoc()) {
    $rows1['data'][] = $data['freal_pr'];
    $rows1['date'][] = $data['tanggal'];
}
$rslt = array();
array_push($rslt, $rows);
array_push($rslt, $rows1);
print json_encode($rslt, JSON_NUMERIC_CHECK);
$mysqli->close();
this is my json view :
I've spent a lot of time trying to solve it but haven't found a solution until now.
Is there an error in my php code?
hope someone will be kind enough to help, Thanks in advance.

