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Which version of CodeIgniter am I currently using?

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How do I check my CodeIgniter version?

Method 1: CodeIgniter makes the task easy and stores its current version number in a global constant named 'public const CI_VERSION'. It is defined in a core file that you can open and check out directly, just go to root_folder/vendor/codeigniter/framework/system/Codeigniter. php and look for the lines.

What is the current version of CodeIgniter?

CodeIgniter 4 is the latest version of the framework, intended for use with PHP 7.3+ (including 8.1). The initial release was February 24, 2020. The current version is v4.2.3.

Is CodeIgniter 4 is a stable version?

Now that the stable version has been officially launched it is time to start creating the projects and take advantage of all that CodeIgniter 4 can offer in terms of performance and productivity in the web application development process.


Yes, the constant CI_VERSION will give you the current CodeIgniter version number. It's defined in: /system/codeigniter/CodeIgniter.php As of CodeIgniter 2, it's defined in /system/core/CodeIgniter.php

For example,

echo CI_VERSION; // echoes something like 1.7.1

Look for define in system/core/CodeIgniter.php:

define('CI_VERSION', '3.1.8');

You should try :

<?php
echo CI_VERSION;
?>

Or check the file system/core/CodeIgniter.php


From a controller or view - use the following to display the version:

<?php
   echo CI_VERSION;
?>

you can easily find the current CodeIgniter version by

echo CI_VERSION 


or you can navigate to System->core->codeigniter.php file and you can see the constant

/**
 * CodeIgniter Version
 *
 * @var string
 *
 */
    const CI_VERSION = '3.1.6';



Please check the file "system/core/CodeIgniter.php". It is defined in const CI_VERSION = '3.1.10';