How to fill a select box using json? - php

Question

I'm trying to fill a select box in a HTML page using json and PHP, but when I click over the select box it just return a blank option. Whats is wrong?
HTML code:
Choose a problem:
<select name="notification" id="notification" class="form-control">
<option value="00">Select...</option>
</select>
PHP code:
header('Access-Control-Allow-Origin: *');
include 'dbconfig.php';
try{
$results = $DB_con->prepare("SELECT idproblema, tipoproblema FROM problema ORDER BY idproblema");
$results->execute();
$res = $results->fetchAll(PDO::FETCH_ASSOC);
$hold = array();
foreach($res as $reg){
$hold[] = array('idproblema' => $reg['idproblema'], 'tipoproblema' =>$reg['tipoproblema']);
}
}
catch (Exception $e) {
echo "Data could not be retrieved from the database.";
exit();
}
echo json_encode($hold);
Jquery code:
$(document).ready(function(){
jQuery.support.cors = true;
$('#notification').click(function(){
$.ajax({
url : 'url.php',
type : 'GET',
data : "json",
crossDomain: true,
success: function (data) {
if (data.length > 0) {
$.each(data, function (index, value) {
$('#notification').append('<option value="' + value.idproblema+ '">' + value.tipoproblema + '</option>');
});
}
else {
var newOption= $('<option value=""></option>');
$('#notification').append(newOption);
}
}
});
});
})
...............................................

Answer 1

You need to add before echo in php
....
header('Content-type: application/json');
....
As jQuery $.ajax set to accepting json data -- you return just text at the moment