how to check version of codeigniter framework?

Question

I recently setup a old Codeigniter framework on my xampp.But i don't know the version of this framework. I use the code

<?php echo CI_VERSION; ?>

but its give me error

Notice: Use of undefined constant CI_VERSION - assumed 'CI_VERSION' in /opt/lampp/htdocs/projectname/views/v_header.php on line 57
CI_VERSION

Please guide me, I am new in Codeigniter.

'' should echo out the correct version of CI. if it doesn't something might be wrong with your CI installation - specially if you comment several times that you have no system folder! I would try to re-install CI from scratch. — Vickel, Dec 23 '16 at 17:16
Does this answer your question? [Which version of CodeIgniter am I currently using?](https://stackoverflow.com/questions/2196799/which-version-of-codeigniter-am-i-currently-using) — adampweb, Nov 14 '20 at 14:13

score 40 · Answer 1 · answered Dec 23 '16 at 06:54

40

See in system/core/CodeIgniter.php and there is a constant like this..

define('CI_VERSION', '3.0.6');

answered Dec 23 '16 at 06:54

Hikmat Sijapati

6,869
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19

I have no any folder with name of system – bansal kapil Dec 23 '16 at 07:06
see in root directory. – Hikmat Sijapati Dec 23 '16 at 07:14

score 12 · Answer 2 · edited Apr 20 '22 at 16:00

12

In the root folder:

cat system/core/CodeIgniter.php | grep CI_VERSION

edited Apr 20 '22 at 16:00

pableiros

14,932
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answered Feb 09 '19 at 02:18

paulc

455
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10

UUOC: `grep CI_VERSION system/core/CodeIgniter.php` – Markus N. Dec 18 '22 at 11:54

score 9 · Answer 3 · answered May 09 '17 at 18:23

9

You can check it two ways. one is to

<?php echo CI_VERSION; ?>

Another way is go to your system/core/CodeIgniter.php path and then check define('CI_VERSION', '2.1.4');

answered May 09 '17 at 18:23

RASEL RANA

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score 5 · Answer 4 · answered Dec 23 '16 at 07:21

Method 1:

Please access the file

System >> Core >> Codeigniter.php

 /**
  * CodeIgniter Version
  *
  * @var    string
  *
  */
  define('CI_VERSION', '3.0.0');

Method 2: In index.php or any other view file write the following code of php as follows:

 <?php
   echo CI_VERSION;
 ?>

CI_VERSION is build in constant in codeigniter, which contains value of version.

Thank you!

score 4 · Answer 5 · answered Dec 23 '16 at 06:53

4

check the file system/core/CodeIgniter.php

answered Dec 23 '16 at 06:53

Linu S

79
10

I have no any folder with name of system – bansal kapil Dec 23 '16 at 07:05
There are 3 folders in your root folder. They are 'application','system' and 'user guides'. – Linu S Dec 23 '16 at 07:33

score 3 · Answer 6 · answered Nov 04 '17 at 17:07

3

Try This:<?php echo CI_VERSION; ?> // echoes something like 3.1.6

answered Nov 04 '17 at 17:07

Rafiqul Islam

931
11
14

score 2 · Answer 7 · answered Dec 23 '16 at 07:58

Which means you are not properly configure your codeigniter project / system folder. System folder is not necessary to be placed in project root. you can place anywhere and configure the correct system path[something like $system_path = '../system';] in the index.php(project root) properly. It should work...

score 1 · Answer 8 · answered Jul 26 '20 at 23:25

1

For CodeIgniter 4, the CI_VERSION is defined in system\CodeIgniter.php

answered Jul 26 '20 at 23:25

user1283182

131
3

score 0 · Answer 9 · answered Dec 19 '21 at 03:43

0

Just use this simple code to check for Codeigniter version

<?= CodeIgniter\CodeIgniter::CI_VERSION ?>

answered Dec 19 '21 at 03:43

Yunat Amos

93
4

Kiran Sone · Answer 10 · 2022-03-09T04:19:00.960

0

If you are running CodeIgniter 4, the CodeIgniter 3 style

<?php echo CI_VERSION; ?>

would not work out and you would get the error - Use of undefined constant CI_VERSION

As @user1283182 has pointed out, the exact version can be found in system/CodeIgniter.php (see const CI_VERSION)

or enter the below code in one of your views

<?= CodeIgniter\CodeIgniter::CI_VERSION ?>

edited Mar 09 '22 at 04:19

answered Mar 09 '22 at 04:02

Kiran Sone

45
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vivek patil · Answer 11 · 2023-04-18T11:30:53.270

0

For CodeIgniter 4

You can also try following path to find CodeIgniter version.

D:\xampp\htdocs\PROJECT_NAME\vendor\codeigniter4\framework\system\CodeIgniter.php

In CodeIgniter.php file, find the following line;

public const CI_VERSION = '4.3.3';

edited Apr 18 '23 at 11:30

answered Apr 18 '23 at 11:30

vivek patil

3
4

Hi, please note, your answer is specific to Windows systems – pierpy Apr 20 '23 at 21:18

how to check version of codeigniter framework?

11 Answers11