使用jQuery ajax调用PHP函数

Question

I'm new to PHP and having some trouble calling PHP methods in through jQuery.

I'm using CodeIgniter. The method I want to call is in /application/controllers/home.php . Here's the relevant code:

<?php

class Home extends CI_Controller {

function __construct() {
    // Call the Controller constructor
    parent::__construct();

    ...
}

function addToCart() {
    // code to add to cart
}

The method I'm attempting to call is addToCart.

Here's the jQuery code:

<script>
$(document).ready(function() {
    $(".addToCart").on('click', function () {
        var url = "<?= base_url() ?>home/addToCart";
        console.log('here');
        $.ajax({
            url: url,
            data: {'id': 1},
            type: 'POST'
        });

        return false;
    });
});

</script>

Even though the path is correct, I keep getting a 404.

I can't seem to pin-point what is going wrong. Thank you for your help!

Fixed:

The Home controller was not the default controller for the app. I had to add index.php in front of it.