通过AJAX / jQuery发送多个JSON对象，返回一个“未定义”数组（PHP）

Question

The goal

Send [{"ID": 1, "Name": "XBOX"}, {"ID": 2, "Name": "Playstation 3"}] via $.ajax() using jQuery.

The problem

I have this:

[...]

var object = $.parseJSON(data);

$.ajax({
    type: "POST",
    url: "laboratory.php",
    data: object,
    success: function(response) {
        console.log(response);
    }
});

And, in laboratory.php :

<?php print_r($_REQUEST); ?>

And finally, the return via console is:

Array
(
    [undefined] => 
)

This is what the data 's variable means:

[{"ID": 1, "Name": "XBOX"}, {"ID": 2, "Name": "Playstation 3"}]

And this is what object means (by Chrome's console):

[Object, Object]

Can someone give me an idea?

Answer 1

have you tried using JSON.stringify:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify

$.ajax({
    type: "POST",
    contentType: 'application/json',
    url: "laboratory.php",
    data: JSON.stringify(object), // using stringify
    success: function(response) {
       console.log(response);
    }
});

Answer 2

Here's the problem. passing your array of objects to $.param() (which is what jQuery does internally with data: that isn't a string) results in "undefined=undefined&undefined=undefined" which is exactly what you are getting back from php. Your array simply is in a format that jQuery can't understand. Since what you actually want to send is json, don't use $.parseJSON because it'll turn your json into an array and what you really want is just a string.

//var object = $.parseJSON(data);

$.ajax({
    type: "POST",
    url: "laboratory.php",
    data: data,
    success: function(response) {
        console.log(response);
    }
});

Answer 3

For multiple data, getJSON is better in my opinion:

$.getJSON('laboratory.php', function(json) {
            $.each(json, function(key, val) {
            //Getting the value of id
            val["ID"];
            //Getting the value of name
            val["NAME"];
             //DO whatever u want.
            });
});