How to Find CodeIgniter Version You are Using?

On 8/29/2016

Hi! In this tutorial we'll see how to find codeigniter version you are using. For pros it may sound basic but would be a challenge for someone getting started with code igniter framework.

A while back I was working in an application built on codeigniter. CI looks like an earlier release but I'm not sure about the exact version of codeigniter the application runs. So I started digging out and found the answer - turns out to be simple like I presumed. And I wish to share here the way I used to find codeigniter version for your reference.


Finding Codeigniter Version:

Method 1:

CodeIgniter makes the task easy and stores its current version number in a global constant named 'CI_VERSION'. It is defined in a core file which you can open and check out directly.

Just go to 'system' » 'core' » 'CodeIgniter.php' and look for the lines,

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

Here it is CodeIgniter 3 but may vary depending on the version you use.

Method 2:

Just as an alternate method to check codeigniter version, you can echo the constant value 'CI_VERSION' somewhere in codeigniter controller/view file.

    echo CI_VERSION;

And that should print codeigniter version. Likewise you can easily find codeigniter version you run.

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