codeigniter uri segment not working properly getting output as 0

问题

localhost/backend/administrator/authentication/8218/0

In codeigniter, I want to fetch these values 8218 and 0.

My code is:

class Administrator extends Controller {

function Administrator()
    {
            parent::Controller();
            $this->load->library('uri');
    }

function authentication()
    {        
        echo $seg1= $this->uri->segment(3);
        echo $seg2 = $this->uri->segment(4);
        echo $this->uri->total_segments(); 
    }

}

I am not getting any output, but I got out put as '0' when I used $this->uri->total_segments();

my config.php 

'AUTO'          Default - auto detects
| 'PATH_INFO'       Uses the PATH_INFO
| 'QUERY_STRING'    Uses the QUERY_STRING
| 'REQUEST_URI'     Uses the REQUEST_URI
| 'ORIG_PATH_INFO'  Uses the ORIG_PATH_INFO
|

$config['uri_protocol'] = "AUTO";

i am using .htaccess

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /backend/

    #Removes access to the system folder by users.
    #Additionally this will allow you to create a System.php controller,
    #previously this would not have been possible.
    #'system' can be replaced if you have renamed your system folder.
    RewriteCond %{REQUEST_URI} ^system.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]    

    #When your application folder isn't in the system folder
    #This snippet prevents user access to the application folder
    #Submitted by: Fabdrol
    #Rename 'application' to your applications folder name.
    RewriteCond %{REQUEST_URI} ^application.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]

    #Checks to see if the user is attempting to access a valid file,
    #such as an image or css document, if this isn't true it sends the
    #request to index.php
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>

<IfModule !mod_rewrite.c>
    # If we don't have mod_rewrite installed, all 404's
    # can be sent to index.php, and everything works as normal.
    # Submitted by: ElliotHaughin

    ErrorDocument 404 /index.php
</IfModule> 

Can any one find out my mistake and suggest me the correct code.

回答1:

You don't need to load the core library. It has been loaded automatically for you. Remove the following line from the constructor, and everything should be working.

$this->load->library('uri');

回答2:

IF you always have this url structure for this controller method I would recommend you use method arguments. The way controller methods usually deal with url segments is by declaring them as method arguments:

public function method_name($agr_1 = 0, $arg_2 = 0)

Here $arg_1 will hold 8218, and $arg_2 - 0

回答3:

Load this $this->load->helper('url'); Codigniter use controller/Method/param/param . so you access these values like this.

 function authentication($first_calue = '0', $second_value='0')
        {        
            echo $seg1= $this->uri->segment(3);
            echo $seg2 = $this->uri->segment(4);
            echo $this->uri->total_segments(); 
            echo $first_calue;
            echo $second_value;

        }

回答4:

You don't need to call the library in the codeignitor Just start the code $this->uri->segment(3);

来源：https://stackoverflow.com/questions/10912283/codeigniter-uri-segment-not-working-properly-getting-output-as-0