Codeigniter 3 - PHP Container

Motivation

When i was software engineer, i'm using Codeigniter 3 framework, at that time that was the meta framework in PHP with MVC structure, and i want this to educate to developers who are going to upgrade there legacy pp with codeignter 3

Problem Context

Codeigniter is not well integrated in composer, the library for PHP, then it using standard installation without containers and even there is no unit or integration with PHPUnit, lets address with that with initial structure

Pathfinding Solution

First, let's create a repository.

Then visit to php docker generator

Open you vscode and create folder in the root with a name of public and scripts, unzip the phpdocker files and paste all files and folders inside to scripts folder and modify the things as follows:

• change the version of php to 7.4 since thats the php versino that codeigniter supported with its frameworks
• explicit versino of nginx alpine and use thi image: 'nginx:1.21.6-alpine'
• modify the docker-compose.yml file and mount the volume of folder public to container public so that we can update the code on hot reload
• modify the dockerfile and docker compose from 7.4 to __${PHP_VERSION}__ lets change it to variable level since this is going to be changing base on your current php version available in your hosting provider, in this article lets use the 7.4 instead
• add this line of codes below in the docker file, modify it accordingly

  
  ARG  PHP_VERSION=7.4
  ENV appname="blog"
  ENV versionmajor="1"
  ENV versionminor="1"
  ENV versionpatch="1"
  ENV appversion="v.${versionmajor}.${versionminor}.${versionpatch}"
  ENV appauthor="Francisco Abayon"

LABEL name="${appname}" \ version="${appversion}" \ author="${appauthor}" \ description="CurlyBytes Codeigniter 3 upgrades"

- and lastly add the .env file inside in the *scripts* folders as well and add the following lines of code
```.env
PHP_VERSION=7.4
APPNAME=codeigniter3upgrades
BASE_LINK="http://localhost:13100/"

add index.php in the public folder with hello world in it

<?php
echo "Hello World!<br>";
?>

go to your terminal/cli application, navigate to your scripts folder and run the docker compose command

docker compose up -d --build

and now you have a working hello world php containerization setup.