save model and ajax in one action yii2 - php

Question

My problem, I don't know how to set $model->code_reg when I use Ajax post. I want save my model code_reg for looping for my ajax post. But its my controller create not work save it
This is my form:
<div class="form-group">
<?= $form->field($model, 'code_reg')->textInput(['readonly' => true]) ?>
</div> <!--I'm using random code and It's was display for this-->
<table id="sampleTbl", class="table table-striped table-bordered">
<thead>
<th>Name</th>
<th>Age</th>
</thead><tbody>
<tr>
<td>William</td>
<td>29</td>
</tr><tr>
<td>Nency</td>
<td>25</td>
</tr>
</tbody>
</table>
<div class="form-group">
<?= Html::submitButton('Create',['class' => 'btn btn-success', 'id' => 'idOfButton']) ?>
</div>
This is my jQuery function:
$('#idOfButton').click(function(){
var TableData = new Array();
$('#sampleTbl tr').each(function(row, tr){
TableData[row]={
'name' : $(tr).find('td:eq(0)').text(),
'age' : $(tr).find('td:eq(1)').text()
}
});
TableData.shift(); // first row will be empty - so remove
var jsonEncode = JSON.stringify(TableData);
// alert(jsonEncode);
$.ajax({
type: "POST",
data: "pTableData=" + jsonEncode,
success: function(msg){
// alert(msg);
},
});
});
This is my controller actionCreate():
$model = new Mutiplearray();
if(Yii::$app->request->isAjax) {
$tableData = stripcslashes($_POST['pTableData']);
$tableData = json_decode($tableData, true);
foreach ($tableData as $key) {
$model->isNewRecord = true;
$model->id = NULL;
$model->name = $key['name'];
$model->age = $key['age'];
$model->code_reg = $model->code_reg; // <---This is my problem I can't save it `code_reg` for ajax looping
$model->save();
}
return $this->redirect(['index']);
} else {
return $this->render('create', [
'model' => $model,
]);
}
I got not set for code_reg when I use like this. How to save model when I use ajax too?