我是ajax的新手，在控制器中发布变量和访问这些变量时遇到了问题。
这是控制器代码
class autocomplete extends CI_Controller {
// just returns time
function workdammit()
{
$product = $this->input->post('productName');
/* $this->load->model('product_model');
$q = 'SELECT quantity FROM products WHERE productName = "BC20BA"';
$data = $this->product_model->get_record_specific($q);
echo json_encode($data[0]->quantity);
*/
echo $product;
}
function index()
{
$this->load->view('autocomplete_view');
}
}
如果我将echo更改为像'Hello World'这样的单引号内的字符串，它将正确地将hello world返回到视图中。但如果我像现在这样尝试，它将不会起到同样的作用。此外，如果我使用echo json_encode($product);，它将返回false。
下面是使用ajax的视图代码。
$( document ).ready(function () {
// set an on click on the button
$('#button').click(function () {
$.ajax({
type: "POST",
url: "<?php echo site_url('autocomplete/workdammit'); ?>",
dataType: "json",
data: 'productName',
success: function(msg){
alert(msg);
}
});
});
});
</script>
</head>
<body>
<h1> Get Data from Server over Ajax </h1>
<br/>
<button id="button">
Get posted varialbe
</button>
class autocomplete extends CI_Controller {
// just returns time
function workdammit()
{
$product = $this->input->post('productName');
//echo $product;
//in ajax dataType is json -here You have to return json data
echo json_encode($product);
}
...
}
//javascript file
var productName = $('#productName).val();//get value of product name from form
$('#button').click(function () {
$.ajax({
type: "POST",
url: "<?php echo site_url('autocomplete/workdammit'); ?>",
dataType: "json",
data: {productName:productName},//You have to send some data from form
success: function(msg){
alert(msg);
}
});