can't use codeigniter 4

chuenk

hi can you help me to my error
Fatal error: Uncaught Error: Call to undefined function CodeIgniter\Config\putenv() in xxxx.com/system/Config/DotEnv.php:116 Stack trace: #0 xxxx.com/system/Config/DotEnv.php(95): CodeIgniter\Config\DotEnv->setVariable() #1 xxxx.com/system/Config/DotEnv.php(52): CodeIgniter\Config\DotEnv->parse() #2 xxxx.com/system/bootstrap.php(143): CodeIgniter\Config\DotEnv->load() #3 xxxx.com/public/index.php(35): require('...') #4 xxxx.com/index.php(6): require_once('...') #5 {main} thrown in xxxx.com/system/Config/DotEnv.php on line 116

aaPanel_Kern

chuenk
Hello, the installation is normal, my environment: nginx1.21, php-7.4
https://codeigniter.org/user_guide/intro/requirements.html
https://codeigniter.org/user_guide/installation/installing_manual.html#

aaP_demo1

chuenk
@aaPanel_Kern

I am stuck as this error too when I enable env for my project. I use PHP 8.4 and disable the putenv function. I did only use command line to deploy the project and a nginx reverse proxy to run the application. Can you help what's the solution on deploying Codeigniter 4 with proxy project without having env error?

My project error log:

2025/06/21 22:41:34 [error] 117374#0: *6736 connect() failed (111: Connection refused) while connecting to upstream, client: [IP], server: example.com, request: ＂GET / HTTP/2.0＂, upstream: ＂http://127.0.0.1:8181/＂, host: ＂example.com＂

chuenk

i use apache 2.4.51

apepsiii

this is happen because your php has disabled putenv() funtion on your server. To solve it, please remove putenv() from the list of disabled functions in your configuration.

you can go to "App Store > PHP 8.0 (according to the php version you are using) > Settings > Disabled functions > find putenv() and select delete
I hope this helps

aaP_mdestafadilah_simrs

apepsiii it's not resolved. it's security issue.

if (! function_exists('putenv')) {
    function putenv(string $assignment) {}
}

// put that code in app/Common.php

but i'm trouble when using nginx with .env file, it's never working. in apache it's work.

nikokenzo

Thank you i hope it will help my problem.

aaPanel_Kern

Hello,
Your log shows a connection problem. It is recommended that you check if the backend service is running normally?

aaP_demo1

aaPanel_Kern
Yes my backend service running normally when only the project does not using .env. When I enable the .env it is not working.

aaP_demo1

aaP_demo1
Nevermind, I just using proxy project with wrong port number

aaP_demo1

aaP_demo1
I see when the backend restart, the service will change port numbers that will be listened.