I want that id hide and show unique Id in Url using Codeigniter?

Question

<a href="<?php echo base_url();?>index.php/registration/invoice/<?php echo ($rows['id']);?>">

function invoice()
{
    $paymentid=$this->uri->segment('3');$record=$this->Registration_model->get_data($paymentid);
}

Answer 1

Create encrypted id with base64_encode

<a href="<?php echo base_url();?>index.php/registration/invoice/<?php echo base64_encode($rows['id']);?>">

function invoice()
{
    $paymentid=base64_decode($this->uri->segment('3'));
    $record=$this->Registration_model->get_data($paymentid);
}