Sending JSON to PHP

Question

I'm tring to send a JSON to a PHP page via jQuery, but it doesn't work properly:

json_data = {};
json_data.my_list = new Array ();

$('#table_selected tr').each (function (i) {
    json_data.my_list.push ({id:$(this).attr("id")});
});

$.post ("my_page.php", json_data, function (response) {
    if (response) alert("success");
    else alert("error");
});

<?php
// this is my_page.php
$json = json_decode (stripslashes ($_REQUEST['my_list']), true);
echo var_dump($json);

?>

This returns NULL to my callback, where I'm wrong?

score 2 · Answer 1 · answered Dec 18 '10 at 20:44

2

you don't need the echo before var_dump

answered Dec 18 '10 at 20:44

Andy

29,707
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score 2 · Accepted Answer · edited May 23 '17 at 12:26

2

JSON is a string representation of JavaScript objects. You're sending something that looks like this:

{my_list: [{id: 'foo'}, {id: 'bar'}, {id: 'baz'}]}

Which is not JSON. This is JSON:

'{"my_list": [{"id": "foo"}, {"id": "bar"}, {"id": "baz"}]}'

I would recommend using json2.js (more info). This can be facilitated using .serializeArray().

edited May 23 '17 at 12:26

Community

1
1

answered Dec 18 '10 at 20:46

Matt Ball

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score 1 · Answer 3 · answered Dec 18 '10 at 20:41

json_data is a literal with an array inside that you put as parameter to the post, and will be sent as encoded array in the post request to the server.

In my_page.php you may want to look at $_POST array.

UPDATE: Ehm, I re-read your question and I'm not completely sure of what I wrote. What I said applies to GET request, and I believe also to post requests.

Sending JSON to PHP

3 Answers3