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Default Controller

We need to tell CodeIgniter to land into our login page instead of the default welcome page. Update the file application/config/routes.php

in your CodeIgniter installation with you controller s name. Well call our landing controller login.

Default Libraries

In the file application/config/autoload.php you can configure the default libraries you want to load in all your controllers. For our case,

well load the database and session libraries, since we want to handle user sessions, and also the URL helper for internal link generation

Encryption Key

When you use the sessionlibrary, you need to set the encryption_keyin the file application/config/config.php.

The Code

Here are the actual Views, Controllers and Model we are using for the login functionality.

User Model (application/models/user.php)

Login Controller (application/controllers/login.php)

41 $route['default_controller'] = "login";

55 $autoload['libraries'] = array('database','session');

67 $autoload['helper'] = array('url');

227 $config['encryption_key'] = 'REALLY_LONG_NUMBER';

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Login View (application/views/login_view.php)

VerifyLogin Controller (application/controllers/verifylogin.php)

This controller does the actual validation of the fields and checks the credentials against the database.

1

2 3 4 Simple Login with CodeIgniter5 6 7 Simple Login with CodeIgniter8

9 10 Username:11 12
13 Password:14 15
16 17 18 19

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Home Controller (application/controllers/home.php)

This is the private page (only authenticated users can access it).

Home Page View (application/views/home_view.php)

The code is pretty easy to follow and understand. Also, you can download the code from here, so you can install it and test it in your

location. Youll only need a full installation of CodeIgniter 2.0.2 and the table in your MySQL database. If you need any help, feel free to

leave us a comment or shoot us an email.

Also, this code uses a pretty basic form validation from CodeIgniter. If you need a more complex validation process, check CodeIgniters Form

Validationdocs at their site.

Cheers!

Posted in Blog, PHP

49 comments on Simple Login with CodeIgniter in PHP

59 }60 ?>

1


5/13

govarthanansays:

January 11, 2013 at 7:52 am

its good one

Joe P.says:

January 13, 2013 at 11:16 pm

Nice and concise. Thanks

alex mbirusays:


this script help me a lot, keep the good work.

flashbagsays:


I was just searching for simple login example. And Ive founded it!

Thank you!

Ebsays:

January 15, 2013 at 8:45 pm

thanks for the great tutorial. Im just getting started with code igniter. Just an observation, User Model (application/models/user/php) is

supposed to be User Model (application/models/user.php). Wrong?

Andres Ariassays:


Fixed! Thanks for the heads up!

http://tinyurl.com/0577horn32250 says:

January 16, 2013 at 12:01 pm

Simple Login with CodeIgniter in PHP Code Factory was in fact a great posting.

In case it possessed much more pics this would be even

much better. Regards ,Gilda

Preethamsays:


thanks a lot for posting this.

Tonysays:


Thanks for this! It helped me a great deal.

It was posted back in 2011 from the looks of it, but still works line for line with the current version in 2013.

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6/13

Shahzeb Babarsays:


It is open for SQL injection. tried it myself.

kapsays:


This is fantastic work..

and also thanks

kapsays:


(dap)

SHWETAsays:


i have tried with your code and created database and tables but not getting how to run this,please help me

Taukil Alisays:


Great post .I like it.

Andres Ariassays:


Hey! Can you post the error you are getting? Or send me an email (aarias_at_codefactorycr.com)

juliansays:


you already put the url helper in the autoload.php so why did you still load it in the login controller?

Andres Ariassays:January 24, 2013 at 9:54 am

Good catch! It is not required in the controller as you say. Ill fix the post.

Thanks!

Austinsays:


Im getting a 404 on verifylogin, yet I followed your guide to the teeth. Could it be an htaccess problem?

Andres Ariassays:


Good catch! I updated the code in user.php to use a more proper version of $this->db->where(), instead of concatenating strings. More

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7/13

info here: http://ellislab.com/codeigniter/user-guide/database/active_record.html

Andres Ariassays:


Hey Austin! Well, it could be an .htaccess problem, since by using form_open(verifylogin); in the

tag, youre using CodeIgniters helper to create an absolute path for the form action, instead of building the url yourself. Have you tried this

without the .htaccess to see how it goes?

andressays:


hi, sorry for my english.

how do I validate that a user is logged in, if I have multiple controllers.

because when I click it back in my browser, and I logged out, I can see my application. Im trying to apply your example to my application

but I could not get it right. Thank you.

Andres Ariassays:

January 28, 2013 at 10:53 pm

In verifylogin.php (line 49) you add the user info to a key called logged_in in the session, so in the private pages you need to check that

this logged_in key exists in the session, like this:

if(!$this->session->userdata(logged_in)){

//Not logged in, redirect to a public page

redirect(home, refresh);

}

And to log out you can do this: $this->session->unset_userdata(logged_in);

Cheers

andressays:

January 28, 2013 at 11:11 pm

if it is exactly what Im doing pass your example to my application, but I have more drivers also I have to validate these and did what you

commented:

if (! $this->session->userdata(logged_in)) {


}

I log off, I get redirected to the login form, but when clicking back on my browser allows me to see all my application. : (

Curiously works fine in Internet Explorer but not in Firefox, Chrome and Opera.

Do you speak Spanish?.

Greetings from Cali, Colombia.

zulsays:

January 28, 2013 at 11:28 pm

Why i get this Error :

An Error Was Encountered

In order to use the Session class you are required to set an encryption key in your config file.

http://www.web2pdfconvert.com/?ref=PDFhttp://www.web2pdfconvert.com/?ref=PDFhttp://ellislab.com/codeigniter/user-guide/database/active_record.html


8/13

I already follow your instruction. anybody can help me?

Jeffsays:


Hi! I get this after following your tutorial:

An Error Was Encountered

Unable to load the requested class: database, session

Can anyone help me? I was wondering what happened?

Manoj Damkondwarsays:


Thanks man now I am starting with codeiniter its very useful for me..

Prashanth.Maddursays:

February 6, 2013 at 3:35 am

its good for beginners.

Morrissays:

February 7, 2013 at 1:41 pm

Thanks!!! this really help me a lot

Christiaan Janssensays:


Awesome tutorial. Works like a charm!

petersays:


Thank you very much, very useful. Ive got only one problem. I think it uses only 1 session for multiple users !?

If i log in as for example bob and in a new tab mike, then when i have a shopping cart in the member area and want to shop, then i add

something and go to the other tab where mike is logged in and put something into the shopping cart, the tab where mike is logged inchanges to bob.

thanks in advance

Andres Ariassays:


Hi Peter

I think the problem youre having is in your browser. The same happens to me in Firefox and Chrome, since the session is shared among

tabs (e.g. youre in amazon and open multiple tabs and add them to your cart, keeping the logged in session). You can try this with a

different browser (two different browsers in the same machine) or maybe with Chrome in incognito mode, since its a separate window and

process from the non-incognito window.

Cheers

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9/13

Sebastiansays:


After doing exactly as requested in the whole login tutorial, what url should I run in my localhost given my local root is

localhost/simple_login?

pliz help

Vladimirsays:February 11, 2013 at 7:14 am

I dont understand one row.

This is in function check_database($password)

$username = $this->input->post(username);

Why you dont put too variable $password?

fe. $password = $this->input->post(username);

Thanks.

Vladimirsays:


I made mistake. Sorry.

I dont understand one row.

This is in function check_database($password)

$username = $this->input->post(username);

Why you dont put too variable $password?

fe. $password = $this->input->post(password);

Thanks.

jithu.majinusays:


realy it is good tutorial for beginners

thank you

pantassays:


help me an error

i try it on appserv 2.5.9, but i get this error..

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, [email protected] inform them of the time the error occurred, and anything you might

have done that may have caused the error.

More information about this error ma be available in the server error lo .

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10/13

Apache/2.2.4 (Win32) PHP/5.2.3 Server at localhost Port 80

please help me..

angelsays:


thanks!

Andres Ariassays:


Hi pantas

Is there a way you could check Apaches logfiles? It seems something went really wrong and threw out that 500 error. You can check for

the error_log or php_error_log (depending on the lamp server youre using).

Cheers

Andres Ariassays:


Hi Sebastian

The url should be something like http://localhost/simple_login/index.php/login(or remove index.php if you have changed the config for this)

Cheers

Andres Ariassays:February 13, 2013 at 7:24 am

Hi Vladimir

As far as I understand, the form_validation methods accept only one field since theyre validating a field in a form. The $this->input-

>post(username) is a trick to have both params when checking the database.

Cheers

Gopikasays:


Hi Andres

Thank you for the tutorial. As a beginner with codeigniter, it was very helpful.

I wanted to create this in both chinese and english.

https://github.com/EllisLab/CodeIgniter/wiki/CodeIgniter-2.1-internationalization-i18n

I had followed this steps and was able to create the language change. But then the login is not working, it is showing Call to a member

function select() on a non-object.

Any help will be appreciated.

Thanks a lot.

http://www.web2pdfconvert.com/?ref=PDFhttp://www.web2pdfconvert.com/?ref=PDFhttps://github.com/EllisLab/CodeIgniter/wiki/CodeIgniter-2.1-internationalization-i18nhttp://localhost/simple_login/index.php/login


11/13

Barsays:


That was really useful. I am learning the codeigniter framework and i can say it is the best sample ive ever seen. Thank you.

funtisays:


once i have comment this line


than it works without any error message.

but after login it will lead to index.php/verifylogin

is it fine ?

and what to do to redirect it to another page !

arunasays:


Really good one . searching for simple sample application to learn codeigniter and found it here

Scavanza Laziendosays:


what is the action in the tag form in the login_view?? i dont get it,,because if you hit the submit button nothing will happen,,oh and by the

way thanks for the tutorial i love it

Jacksays:


Hi,

Your tutorial was very helpful! However when I attempt to log in I get this error:

The requested URL /LoginTut/login/VerifyLogin was not found on this server.

Do you know what might be the problem?

I posted a question of my problem on StackOverflow. It describes in detail what I did and the problem I am now having.

http://stackoverflow.com/questions/14940118/simple-login-system-using-codeigniter-returning-404-on-login#comment20967412_14940118

Id appreciate any help on the topic but once again fantastic tutorial!

Nitishsays:


Thanks for the tutorial. I am getting the error

A PHP Error was encountered

Severity: Notice

Message: Undefined property: Verifylogin::$form_validation

Filename: controllers/verifylogin.php

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12/13

Line Number: 18

line number 18 is

$this->form_validation->set_rules(username,'Username,'trim|required|xss_clean);

Andres Ariassays:


Hi Nitish

Do you have the line $this->load->library(form_validation); before line 18? You need this line to load the validation library.

Cheers

Andres Ariassays:


Hi Scavanza

The action in the form is added here => < ?php echo form_open('verifylogin'); ?> (login_view.php, line 9). This is the same as creating the

full tag

Thanks

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