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?

Community · Accepted Answer · 2017-05-23 12:26:55Z

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().

Andy · Accepted Answer · 2010-12-18 20:44:42Z

2

you don't need the echo before var_dump

answered Dec 18, 2010 at 20:44

Andy

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Comments

Minkiele · Accepted Answer · 2010-12-18 20:41:53Z

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.

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