รบกวนหน่อยค่ะ เมื่อกด Submit อยากให้ค่ายังอยู่ต้องทำยังไงคะ ค่าดึงมาจาก Json

 echo $text = '<div id="di"></div>';

<select id='text' style="width: 120px;"class="form-control custom-select" onchange="myFunction()" >
<option value='<?php echo $text; ?>'><?php echo $text; ?></option>
</select>
 <span class="input-group-btn">
 <button type="submit" id="submit2" name="submit2" value="submit2" class="btn btn-info btn-flat" ><i class="fa fa-search"></i></button>
                    </span>

  <div id="di"></div>;
        <script>
			 $(document).ready(function(){
				$("#text").select2({
					ajax: {
						url: 'json_get.php',
						dataType: 'json',
						type: "POST",
						delay: 250,
						data: function (params) {
							return {
							term: params.term						
							};
						}, 
					processResults: function (data) {
						 
						return {
  				            results: data
							
							 //results: $.map(data, function(obj) {
							// return { id: obj.id, text: obj.id };
							// })
							};
						}
					}
				});
				
			   });



 function myFunction() {
	var x = document.getElementById("text").value;
	var z = '00';
	document.getElementById('di').innerHTML = z+x;	  			   
} 
</script>

if(!isset($_POST['search '])){ 

  $fetchData = $connn->Selectrecordjoin("SELECT TOP (5) PERCENT name FROM user GROUP BY id ORDER BY id ");
}else{ 
  $search = $connn->converttoutf8($_POST['search ']);
  $fetchData = $connn->Selectrecordjoin("SELECT name FROM user WHERE name Like '%$search%' GROUP BY id ");
}
$data = array();
while ($row = $connn->parseArray($fetchData)) {
	$name = $connn->converttotis620($row['name']);
  $data[] = array("id"=>$row['id'], "text"=>$name);
}
echo json_encode($data);