Vfrdtyky

when i use a code like,

<input type="hidden" name="foo" value="<?php echo $var;?>" />

the $var is displayed in source code of my web page. is there any way i can hide that variable from my users seeing in my source code by using PHP/Codeigniter? am using codeigniter for my project.

in short, what i want to do is send data to a controller when a form is submitted. but not through url or hidden html input fields

You can use codeigniter's session library to store data which won't be visible in source code.

• Session library need to be loaded ($this->load->library('session'); or autoload in application/config/autoload.php )


• In your controller set the data what you want to store ($this->session->set_userdata(['your_secret_data_key' => 'your_secret_data_value']);)


• You can retrieve your data ($this->session->userdata('your_secret_data_key');)

So before you generate the form add the data, and in the controller which will process your form you can retrieve the previously stored data.

More info about the session library: Codeigniter's session library documentation

You can use encryption library to encrypt this value before you send it to the view and upon retrieving it decrypt it again.

Loading the library: $this->load->library('encryption');

you can find more details in the documentation about its configurations.
encryption

$var = 'value';

$var = $this->encryption->encrypt($var);

$this->load->view('view', array('var' => $var));

Now you have an encrypted $var, do whatever you have to do and upon retrieval you can just use this:

$var = $this->encryption->decrypt($var);

echo $var;    // value