如何在 PHP 中解析通过 AJAX 发送的嵌套 JSON

Question

Say I have this AJAX sent via jQuery to a PHP server

$.ajax({
    url: woocommerce_admin_meta_boxes.ajax_url,
    data: data,
    type: 'POST',
    success: function (res) {
        if (res.success) {
            location.reload();
        }
    }
});

and data looks like this

data = {
    order_id: woocommerce_admin_meta_boxes.post_id,
    order_items : [
        {
            order_item_id: 69420,
            amount: 420
        },
        {
            order_item_id: 42069,
            amount: 69
        }
    ]
};

What I have found out is by using PHP's $_POST , I can access the order id like this

$order_id = $_POST['order_id'];

However, I am not sure of how I can access stuff inside order_items from data . From what I've seen in this stackoverflow post , there's a PHP function called json_decode() , but I'm not so sure of how to use this together with AJAX or $_POST .

Answer 1

$.ajax() doesn't use JSON encoding, it sends URL-encoded format, so there's no need to use json_decode() .

To access the nested data, just use ordinary array accessing in the $_POST variable.

foreach ($_POST['order_items'] as $item) {
    echo "Item ID: " . $item['order_item_id'] . "<br>";
    echo "Amount: " . $item['amount'] . "<br>";
}