Codeigniter Hidden Form Becomes NULL - php

Question

I've got a really weird issue that I can't seem to figure out or understand. So essentially I have a to grab the ID passed through the Codeigniter URI, have it populate a hidden form, and then submitted. However when I submit the form as hidden, it comes back saying the data is NULL. I have tried and changed it to form_input and it works fine. Can anyone help me or explain to me why this is the case?
I have tried the following solutions.
URL
http://localhost/list/players/add/1/
where I want URI 3 ('1') to pass on to the form and submitted.
Solution 1 - Having the URI pass straight to data array
Controller
function add() {
if($this->form_validation->run() == FALSE) {
$data['view_file'] = 'add';
$this->load->module('template');
$this->template->cmslayout($data);
} else {
$league_id = $this->uri->segment(3);
$data = array(
'leagues_id' => $league_id,
);
if($this->_insert($data)){
return $query;
}
redirect ('/players/');
}
}
Solution 2 - Grabbing the URI and fill a hidden form
Controller
function add() {
$league_id = $this->uri->segment(3);
$this->load->module('leagues');
$data['leagues_list'] = $this->leagues->get_where($league_id);
if($this->form_validation->run() == FALSE) {
$data['view_file'] = 'add';
$this->load->module('template');
$this->template->cmslayout($data);
} else {
$data = array(
'leagues_id' => $this->input->post('leagues_id'),
);
if($this->_insert($data)){
return $query;
}
redirect ('/players/');
}
}
View
<?php
echo form_open('players/add/');
?>
<?php
echo "<br>";
echo "<br>";
echo "League Name";
echo "<br>";
foreach ($leagues_list->result() as $row) {
$league_id = $row->id;
$league_name = $row->league_name;
echo $league_name;
$data = array( 'name' => 'leagues_id',
'value' => $league_id,
);
echo form_hidden($data);
}
echo "<br>";
echo "<br>";
$data = array( 'value' => 'Set Player',
'name' => 'submit',
'class' => 'submit-btn',
);
echo form_submit($data);
echo form_close();
?>
In both scenarios, on submit it comes back with an error saying leagues_id is NULL. Now I have tried in Solution 2 to change from 'form_hidden' to 'form_input' and straight away clicking submit and it works fine.
Can anyone help me or advise why this is the case?
Many thanks.

Answer 1

If you want to add a parameter to your controller's function, you have to add it to: function func($parameter = 0) (= 0 is optional for default value).
In this case you can access the parameter by $parameter.
In your View file, you can open your form to post to the current url. For this you need to load the url helper in your controller: $this->load->helper('url'); (or you can autoload it in application/autoload.php).
Your form_hidden declaration was bad too. If you want to declare it with array(), then you have to use this syntax:
$data = array(
'name' => 'John Doe',
'email' => 'john#example.com'
);
echo form_hidden($data);
// Would produce:
<input type="hidden" name="name" value="John Doe" />
<input type="hidden" name="email" value="john#example.com" />
More information on Form helper: https://ellislab.com/codeigniter/user-guide/helpers/form_helper.html
For the right solution, try this:
Controller
function add($league_id = 0)
{
if($league_id != 0)
{
$this->load->module('leagues');
$data['leagues_list'] = $this->leagues->get_where($league_id);
if($this->form_validation->run() == FALSE)
{
$data['view_file'] = 'add';
$this->load->module('template');
$this->template->cmslayout($data);
}
else
{
$data = array(
'leagues_id' => $this->input->post('leagues_id'),
);
if($this->_insert($data))
{
return $query;
}
redirect ('/players/');
}
}
View
<?php
echo form_open(current_url());
echo "<br /><br />";
echo "League Name <br />";
foreach ($leagues_list->result() as $row)
{
$league_id = $row->id;
$league_name = $row->league_name;
echo $league_name;
echo form_hidden('leagues_id', $league_id);
}
echo "<br /><br />";
$data = array(
'value' => 'Set Player',
'name' => 'submit',
'class' => 'submit-btn'
);
echo form_submit($data);
echo form_close();
?>