No $_POST data

[eluser]BenInBlack[/eluser]
New to codeigniter, actually have to use it for this project.

Ok, I'm working with a situation where there will be dynamic number of input fields in a form so i need to use $_POST to iterate thru them

Code:

//Set post arg to vars
foreach ($_POST as $name=>$values) {
    $this->global_class->checkArgFiltered($name);
    echo "{$name} = {$value}";            
}

my form action is

Code:

<form action="<?php $_SERVER['SERVER_NAME'];?>/index.php/pdf/write" method="POST" enctype="text/plain">

I need $_POST to work or I need a codeignter method.

i tried calling $this->input->post() with out param hoping that it would return an array of the post args

Please help!