如何查看 codeigniter 框架的版本？

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.

Answer 1

在system/core/CodeIgniter.php看到，有一个这样的常量..

define('CI_VERSION', '3.0.6');

Answer 2

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');

Answer 3

In the root folder:

cat system/core/CodeIgniter.php | grep CI_VERSION

Answer 4

检查文件系统/core/CodeIgniter.php

Answer 5

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!

Answer 6

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

Answer 7

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...

Answer 8

对于 CodeIgniter 4，CI_VERSION 定义在 system\\CodeIgniter.php

Answer 9

只需使用这个简单的代码来检查 Codeigniter 版本

<?= CodeIgniter\CodeIgniter::CI_VERSION ?>

Answer 10

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 ?>