Using jQuery to post multiple values to server

Question

The following script will send $_POST['id']=[1,2,3] to the server.

Instead I wish to either send $_POST['id']=[[1,'extra1'],[2,'extra2'],[3,'extra3']] to the server, or send both $_POST['id']=[1,2,3] and $_POST['extra']=['extra1','extra2','extra3'] to the server.

I could do so by iterating over the table, but the HTML is PHP generated, and instead I would like to modify the HTML to make doing so as straightforward as possible.

How is this best accomplished?

https://jsfiddle.net/5a8cLt08/2/

$('#go').click(function() {
  var data = $('#mytable tbody input.cb:checked').serializeArray();
  console.log('data', data);
  $.post('ajax.php', data, function(json) {
    console.log('json', json);
  }, 'json');
});

<table id='mytable'>
  <tbody>
    <tr>
      <td>
        <input class="cb" type="checkbox" value="1" secondValue="extra1" name="id[]">
      </td>
      <td>bla1</td>
      <td>
        <input class="cb" type="checkbox" value="2" secondValue="extra2" name="id[]">
      </td>
      <td>bla2</td>
      <td>
        <input class="cb" type="checkbox" value="3" secondValue="extra3" name="id[]">
      </td>
      <td>bla3</td>
    </tr>
  </tbody>
</table>
<button id="go">Go</button>

apokryfos · Accepted Answer · 2016-03-04 08:51:36Z

1

<input class="cb" type="checkbox" value="1" name="id[]">
<input type="hidden" name="extras[1]" value="extra1" />

This will populate the $_POST['extras'] with an associative array of id => extra. This is of course assuming you're populating this via a PHP loop and can achieve the above easily.

If not you'll probably need to use JavaScript to extract the attributes you want from the inputs.

Update

You can also pass JSON values to this. Ideally you'd want to do a $valueData = json_encode to the data you want to pass as a value.

The input will look something like :

    <input class="cb" type="checkbox" value='{ "id": 1, "extras": "extra1"  }' name="id[]">

Your $_POST will be something like:

$_POST["id"] = [ 
    '{ id: 1, extras: "extra1" }', ... 
]

You can get the required data by doing something like:

$data = json_decode($_POST["id"][0]);

$id = $data->id; $extra = $data->extras;

edited Mar 4, 2016 at 8:51

answered Mar 3, 2016 at 16:54

apokryfos

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6 Comments

user1032531 Over a year ago

Yes, I suppose I could do so, and it would be easy to do so. It would, however, result in extra data being posted which isn't needed as only the extra values associated with checked values are needed. I was wondering if I could use something like value=[1,'extra1'], but don't expect I can. Or maybe putting a data value in each input, selecting the matched input.cb:checked, and some how serializing the data values?

apokryfos Over a year ago

@user1032531 You can set a JSON encoded value in your value and then decode it using json_decode probably and not use the hidden field at all.

user1032531 Over a year ago

@would a typical value look like I showed it in my previous comment, or would it have quotes around it to be valid HTML?

user1032531 Over a year ago

Nice! I will select it as an answer after I test it. Thanks!

user1032531 Over a year ago

For this to work, you need to put quotes around the JSON property names in the HTML.

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