Index

====CodeIgniter 4==== Simple demo of CI4 framework. ===Environment=== Devuan Chimaera 4.0 ===Install Apache & PHP=== Update


apt update
apt full-upgrade

Install


apt install apache2 php php-cli php-mbstring php-intl php-curl php-json php-mysqlnd php-xml

PHP version


php --version
PHP 7.4.28 (cli) (built: Feb 17 2022 16:17:19) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.28, Copyright (c), by Zend Technologies

===Install MySQL=== Install MariaDB fork of MySQL.


apt-get install default-mysql-server default-mysql-client

MySQL version


mysql --version
mysql  Ver 15.1 Distrib 10.5.15-MariaDB, for debian-linux-gnu (x86_64) using  EditLine wrapper

===Install CI4=== Download package and unzip into htdocs.


mkdir -p /var/www/htdocs
cd /var/www/htdocs
wget https://api.github.com/repos/codeigniter4/CodeIgniter4/zipball/v4.2.4 -O ci4.2.4.zip
unzip ci4.2.4.zip
mv codeigniter4-CodeIgniter4-* hostname.kewl.org
cd hostname.kewl.org
chown www-data:www-data writable

Warning: 4.1 would auto-detect routes but this is not the case with 4.2. ===Configure apache===



    DocumentRoot "/var/www/htdocs/hostname.kewl.org/public"
    ServerName hostname.kewl.org
    ServerAdmin root

    Header append X-FRAME-OPTIONS "SAMEORIGIN"

    RewriteEngine On
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule .* /var/www/htdocs/hostname.kewl.org/public/index.php [L]

    
        Options None
        AllowOverride None
    

    CustomLog /var/log/apache2/hostname.kewl.org/access.log combined
    ErrorLog  /var/log/apache2/hostname.kewl.org/error.log

===Configure CI4=== Change baseURL and indexPage in app config.


vi app/Config/App.php

Change logging threshold if required.


vi app/config/Logger.php

=== Hello world==== ==Controller==


vi app/Controllers/Hello.php

==Index view==


vi app/Views/Index.php





    Index




renderSection("Content")?>

==Controller view==


vi app/Views/Hello.php


extend("Index");
    $this->section("Content");
    phpinfo();
    $this->endSection();
?>

==Route== vi app/Config/Routes.php


$routes->get('/Hello', 'Hello::index');

==URL==


http://hostname.kewl.org/Hello

===Resources=== [[https://codeigniter4.github.io/CodeIgniter4/outgoing/view_layouts.html|View layouts]] [[https://codeigniter.com/user_guide/incoming/routing.html|Routing]] [[https://onlinewebtutorblog.com/codeigniter-4/what-is-codeigniter/|Basic overview]]