php - Need help retrieving a uri segment in codeigniter -

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i have url in codeigniter encrypted value. when try uri segment codeigniter not able find it.

is there anyway can use prefix find it?? below url using 

localhost/sandbox/index.php/client/applicants/applicantslist/index?proj=ijo7w%2bricislaru8qcjznxc7s7c3mi%2bvyon49ufsf9u%3d/5    //set 11 testing purposes    $config['total_rows'] = 11;      $config['per_page'] = 5;      $config['num_links'] = 4;     $config["prefix"] = "page=";   // showing nothing     fb($this->uri->segment("5"));

a segment part of url itself, i.e. index available or applicantslist available.

anything after ? within scope of $_get variables or codeigniter $this->input->get()

it looks should using $this->input->get('proj') in case


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