how to take the url to became a variable

[eluser]yudahebat[/eluser]
no. I need the segment(3) to get the ID of my tabel that I choose
to show on $data

I've tried your code
but I still use

Code:

$id = $this->uri->segment(3);

and I got an error

Code:

A PHP Error was encountered

Severity: Notice

Message: Undefined variable: query_row

Filename: controllers/adminpage.php

Line Number: 240

Fatal error: Call to a member function num_rows() on a non-object in C:\xampp\htdocs\CI2\system\application\controllers\adminpage.php on line 240

I also cek your code without editing

and got an error also

no data pass to the view