使用materializecss框架和php mysql将动态选择框输入到inputbox

Question

我创建了一个从数据库中检索的动态选择框。在selectbox中显示成功。但是，它无法将数据显示到文本输入。请帮忙

<form class="col s12" action="" method="post">
    <div class="row">
        <div class="input-field col s12">
            <?php
                $npm        = $connect->execute("SELECT * FROM tbl_respondent WHERE npm ORDER BY npm ASC");
                $row_count  = $npm->num_rows;
            ?>
            <select name="npm" class="npm">
                <option value="" disabled="disabled" selected>Pilih NPM Anda</option>
                <?php
                    if ($row_count > 0) {
                        while ($row = $npm->fetch_assoc()){
                            echo '<option value="'.$row['npm'].'">'.$row['npm'].'</option>';
                        }
                    }
                    else {
                        echo '<option value="">NPM tidak tersedia</option>';
                    }
                ?>
            </select>
            <label>Pilih NPM</label>
        </div>
    </div>
    <div class="row">
        <div class="input-field col s12">
            <input id="alumni_name" name="name" type="text" class="validate">
            <label for="alumni_name">Nama Mahasiswa</label>
        </div>
    </div></form>

javascript代码在这里：

 $('select').material_select();
        $('.npm').on('change', function(){
            var npm = $(this).val();
            if (npm) {
                $.ajax({
                    type: 'GET',
                    dataType: "JSON",
                    url: 'index/npm_search.php',
                    data: 'npm=' + npm,
                    success: function(html){
                        var toAppend = '';
                        $.each(html, function(value){
                           toAppend += '<input id="alumni_name" name="name" type="text" value="'+value.text+'">';
                        });
                        $('#alumni_name').append(toAppend);
                    }
                });
            }
        });

        $('select').on('contentChanged', function() {
            // re-initialize (update)
            $(this).material_select();
        });

和npm_search.php在这里：

require_once 'apps/model/class.connection.php';

$connect        = new Connection();

if (isset($_GET['npm']) && !empty($_GET['npm']))
{
    $name       = $connect->execute("SELECT * FROM tbl_respondent WHERE npm = ".$_GET['npm']."ORDER BY name ASC");

$row_count  = $name->num_rows;

$return     = [];
$i          = 0;
if ($row_count > 0)
{
    $return[$i] = [
        'id'    => '',
        'text'  => 'Pilih NPM anda',
    ];
    while ($row = $name->fetch_assoc())
    {
        $i++;
        $return[$i] = [
            'text'  => $row['name'],
        ];
    }
}
else {
    $return[$i] = [
        'id'    => '',
        'text'  => 'NPM Tidak tersedia',
    ];
}
echo json_encode($return);
}