如何从ajax调用控制器并发送$ _POST

Question

I want to call controller from ajax and send POST into database. After POST was sent, i will display database into dropdown list.

but i don't know what to do. here is my code.

ajax script inside view add_produk.php

<script>
    function getId(val){
        // ajax function
        $.ajax({
            type: "POST",
            url: "<?php base_url();?>index.php/getdata",
            data: "id_kategori="+val,
            success: function(data){
                $("#subcat").html(data);
            }
        });
    }
</script>

i want to load controller getdata.php and send $_POST into this controller, Controller getdata.php :

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');


class Getdata extends CI_Controller
{

    public function index()
    {
        if(!empty($_POST["id_kategori"])){
            $idcat = $_POST["id_kategori"];
            $sql = "SELECT * FROM sub_kategori WHERE id_kategori = $idcat";
            $result = $this->db->query($sql);

            foreach ($result as $subcat) {

                ?>
                <option value="<?php echo $subcat["id_sub_kategori"];?>"><?php echo $city["nama_sub_kategori"];?></option>

                <?php
            }
        }
    }
}
?>

how i can fix my problem?

Answer 1

我认为这里的数据有误：“ id_kategori =” + val我不知道php，但是你可以尝试“ data：{id_kategori：val}”祝你好运