$getSYList = loadSchoolYearList();
$loadSemCount = getTotalStudListEverySem();

function loadSchoolYearList(){
    include '..assetsdatabaseconnect.php';
    $list = array();
    $i = 0;
    $query = "SELECT DISTINCT schoolYear FROM tblschoolyear";
    $result = $conn->query($query);
    if ($result->num_rows > 0) {
        while($row = $result->fetch_assoc()) {
            $list[$i][] = $row['schoolYear'];
            $i++;
        }
    }
    return $list;
}

function getTotalStudListEverySem(){
    include '..assetsdatabaseconnect.php';
    $i = 0;
    $count = 1;
    $sem = 1;
    $semList = array();
    $schoolYearCount = 0;

    // Count tblschoolyear record
    $query = "SELECT COUNT(syId) as totalSY FROM tblschoolyear";
    $stmt = $conn->prepare($query);
    $stmt->execute();
    $stmt->store_result();

    if($stmt->num_rows > 0){
        $stmt->bind_result($schoolYearCount);
        while($stmt->fetch()) {
            $schoolYearCount=$schoolYearCount;
        }
    }

    for($count;$count<=$schoolYearCount;$count++){
        $query = "SELECT COUNT(r.infoId) as totalSemCount FROM tblreg as r ";
        $query .= "INNER JOIN tblschoolyear as sy ON sy.syId=r.syId ";
        $query .= "INNER JOIN tblstudinfo as i ON r.infoID=i.infoID WHERE sy.syID=". $count ." AND sy.SchoolSem=". $sem ."";
        $result = $conn->query($query);
        if ($result->num_rows > 0) {
            while($row = $result->fetch_assoc()) {
                $semList[$i][] = $row['totalSemCount'];
                $i++;
            }
        }
        if ($sem==2){
            $sem = 1;
        }else{
            $sem++;
        }
    }
    $conn->close();
    return $semList;
}

<?php
    $data = [[
        'label' => "2017-2018-1",
        'value' => 3000
    ], [
        'label' => "2017-2018-2",
        'value' => 4000
    ]];
?>
<script>var chartData = <?=json_encode($data)?>;</script>

<?php
    $data = [[
        'label' => "2017-2018-1",
        'value' => 3000
    ], [
        'label' => "2017-2018-2",
        'value' => 4000
    ]];
?>
<script>var chartData = <?=json_encode($data)?>;</script>

<?php
    $data = [[
        'label' => "2017-2018-1",
        'value' => 3000
    ], [
        'label' => "2017-2018-2",
        'value' => 4000
    ]];
?>
<script>var chartData = <?=json_encode($data)?>;</script>

<?php
    $data = [[
        'label' => "2017-2018-1",
        'value' => 3000
    ], [
        'label' => "2017-2018-2",
        'value' => 4000
    ]];
?>
<script>var chartData = <?=json_encode($data)?>;</script>

Morris.Donut({
    element: 'morris-donut-chart',
    data: chartData,
    resize: true
});