Why is $_POST empty in Codeigniter?

Question

I've seen questions similar to this one, but still didn't find the solution, and this is really wasting my time :(

Here's my controller

public function test() {
 print_r($_POST);
 return;
}

View

<?php 
 echo form_open(base_url('go/test'), 'id="update" autocomplete="off" ajax-hidden'); 
 echo form_hidden('id', $id); 
?>
 <input id="update" name="number" class="spinner" readonly="readonly" 
 value="<?$=value?>"/>
<?php 
 echo form_close();
?>

I'm using jQuery to submit the form once the jQuery UI spinner is changed. This is the response:

Array()

• Sarah: I must add that other forms in the website work fine
• somedev: That input doesn't seem to have a type, should it be type="hidden" ? Probably not the cause.
• M Khalid Junaid: stackoverflow.com/questions/14201815/… see and check

Answer 1

Most likely jQuery is not able to get a value to pass over to your Controller because your form and input elements have the same id update

Also <?$=value?> is incorrect syntax. It should be <?= $value ?>

Answer 2

Also you should use codeingiters post handlers $something = $this->input->post('something');

http://ellislab.com/codeigniter/user-guide/libraries/input.html

Answer 3

Change your input id to something other than "update" And change < ?$=value > to < ?=$value >

<input id="myInput" name="number" class="spinner" readonly="readonly" value="<?= $value?>"/>

Answer 4

I forgot that I changed my ajax handler to work with IE and didn't change the ajax function for this particular form, because this form's response should be hidden, so it uses a different ajax handler.

This is my main submit function:

(function($){
 jQuery.fn.ajaxFormSubmit =
 function(container, data) {
 var url = $(this).attr('action');
 $.ajax({
 url: url,
 type: "POST",
 data: data,
 dataType: "html",
 success: function(msg) {
 $(container).html(msg);
 }
 });
 return this;
 };
})(jQuery);

I used to serialize the form data inside this function but then I realized it didn't work for IE, the only solution was to serialize the form data before doing anything else!

Here are the 2 functions I'm using:

$('form[ajax]').live('submit', function(e){
 e.preventDefault();
 var data = $(this).serialize();
 var container = $(this).attr('cont');
 if (typeof container == 'undefined' || container == false) {
 container = '.#ajax';
 }
 $(container).html('<img src="public/images/ajax.gif"/>');
 $(container).fadeIn('fast');
 $(this).ajaxFormSubmit(container, data);
});
$('form[ajax-hidden]').live('submit', function(e){
 e.preventDefault();
 var data = $(this).serialize();
 var container = '';
 $(this).ajaxFormSubmit(container, data);
});

The second function simply didn't have the data variable. So I added it. Hope this can help someone.