$this->input->post() and $_POST is NULL in codeigniter - forms

Question

I am getting a problem in codeigniter where i have a view file called view.php.
<?php echo form_open('');?>
<table class="table">
<thead>
<tr>
<th>Full Name</th>
<th>Username</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<tr>
<td><?php echo form_input('fullname1',$row_data['fullname']);?> </td>
<td><?php echo form_input('username1',$row_data['username']);?></td>
<td><?php echo anchor("welcome/save/".$row_data['rid'],form_button('button',"Save"));?></td>
</tr>
</tbody
</table>
<?php echo form_close();?>
and here is my save method
public function save($rid){
$arr=array('fullname'=>$this->input->post('fullname1'),
'username'=>$this->input->post('username1')
);
var_dump($_POST);
var_dump($arr);
}
both array varable giving me NULL values while the textboxes have the values Please Help.... Thanks

Answer 1

you need to add the url to your form_open method. Try
echo form_open("your_url");
give the path of your save method instead of your_url.
Also check documentation here
The form_open method demands a target url.

Answer 2

In View
# Syntax <?php echo form_open('controllerName/MethodName');?>
<?php echo form_open('welcome/save');?>
// remove this
<td><?php echo anchor("welcome/save/".$row_data['rid'],form_button('button',"Save"));?></td>
// Add this
echo form_submit('mysubmit', 'Submit Post!');
In Controller
public function save(){
$fullname= $this->input->post('fullname1');
$username = $this->input->post('username1');
echo "MY name is ".$fullname." UserName Is : "$username;
}
Read Form Helper Codeigniter and form-validation-using-codeigniter example