How to Install CodeIgniter4

Codeigniter 4 the lightweight framework of PHP with small footprints. There is not too much configuration required to run. It is not required to use the command line in Codeigniter.

Requirements:

• Php 7.2 (min)
• Extensions (*intl* extension,*mbstring* extension)
• Database – MySQL
• Localhost server (xampp, wamp, lamp)

Note: you can download any third-party application to create the localhost like xampp, wamp, lamp

Step1. Download Codeigniter 4 

Step2. Extract the zip file in your localhost root directory.

Step3. Open your project in your fav code editor. Here I have used  VScode.

Project running successfully in chrome hit the URL http://localhost/C4/public/

Step 4. Now if you want to Remove public from the URL 

• Copy the index.php and .htaccess file form the public folder and past outside the public folder. 
• Open the index.php and change the below-given code 

$pathsPath = realpath(FCPATH . ‘../app/Config/Paths.php’);

Replae the above line From below

$pathsPath = realpath(FCPATH . ‘/app/Config/Paths.php’);

• And press Ctrl+S to save the changes
• Now you can access the project without the public http://localhost/C4/

Step5. Now create the below-given files in your project

• Home_cnt.php  at path xampp\htdocs\C4\app\Controllers
• Blogs_mod.php at path xampp\htdocs\C4\app\Models
• AddBlog_view.php at path xampp\htdocs\C4\app\Views
• BlogsList_view.php at path xampp\htdocs\C4\app\Views
• EditBlog_view.php at path xampp\htdocs\C4\app\Views

Step6. Configure the database into your project.

Open .env and setup the default database connection

database.default.hostname = localhost

database.default.database = codeigniter4

database.default.username = root

database.default.password = 

database.default.DBDriver = MySQLi

Step7. Setup the project env

Open .env and change the project environment

CI_ENVIRONMENT = development

Step8. Add the given below code into respected files

Home_cnt.php

<?php namespace App\Controllers;

use App\Models\Blogs_mod;

class Home_cnt extends BaseController

{

//blog list

public function index(){

$post = new Blogs_mod();

$data[‘postList’] = $post->findAll();

return view(‘BlogsList_view’,$data);

}

//edit blog

public function edit($id){

$post = new Blogs_mod();

$title = $_POST[‘title’];

$description = $_POST[‘description’];

$data = [

‘blog_title’ => $title,

‘blog_description’  => $description

];

$session = session();

if($post->where(‘blog_id’, $id)->set($data)->update()){

$session->setFlashdata(‘success’, ‘Record Updated Success!’);

}else{

$session->setFlashdata(‘error’, ‘Failed!’);

}

return redirect(‘home’);

}

//delete blog

public function Delete($id){

$post = new Blogs_mod();

$session = session();

if($post->where(‘blog_id’,$id)->delete()){

$session->setFlashdata(‘success’, ‘Record Deleted Success!’);

}else{

$session->setFlashdata(‘error’, ‘Failed!’);

}

return redirect(‘home’);

}

//add blog

public function store(){

$post = new Blogs_mod();

$title = $_POST[‘title’];

$description = $_POST[‘description’];

$data =[

‘blog_title’ =>$title,

‘blog_description’ =>$description

];

$session = session();

if($post->insert($data)){

$session->setFlashdata(‘success’, ‘Record added Success!’);

}else{

$session->setFlashdata(‘error’, ‘Failed!’);

}

return redirect(‘home’);

}

//add blog ui

public function addNew(){

return view(‘AddBlog_view’);

}

public function update($id){

$post = new Blogs_mod();

$data[‘BlogDetails’] = $post->where(‘blog_id’,$id)->first();

return view(‘EditBlog_view.php’,$data);

}

}

Blogs_mod.php

<?php namespace App\Models;

use CodeIgniter\Model;

class Blogs_mod extends Model

{

protected $table      = ‘blogs’;

protected $primaryKey = ‘blog_id’;

protected $returnType     = ‘array’;

protected $useSoftDeletes = false;

protected $allowedFields = [‘blog_id’, ‘blog_title’,’blog_description’];

protected $useTimestamps = false;

protected $validationRules    = [];

protected $validationMessages = [];

protected $skipValidation     = true;

}

AddBlog_view.php

<main role=”main” class=”container” style=”margin-top:100px;”>

<div style=”margin:30px;text-align:right;”>

<a href=””><button type=”button” class=”btn btn-primary”>Add New</button></a>

</div>

<form action=”<?php echo base_url(‘/Home_cnt/store’) ?>” method=”post”>

<div class=”form-group row”>

<label for=”inputEmail3″ class=”col-sm-2 col-form-label”>Email</label>

<div class=”col-sm-10″>

<input type=”text” class=”form-control” id=”title” name=”title” placeholder=”Title”>

</div>

</div>

<div class=”form-group row”>

<label for=”inputPassword3″ class=”col-sm-2 col-form-label”>Description</label>

<div class=”col-sm-10″>

<textarea name=”description” class=”form-control” id=”” cols=”30″ rows=”10″>Description</textarea>

</div>

</div>

<div class=”form-group row”>

<label for=”inputPassword3″ class=”col-sm-2 col-form-label”></label>

<div class=”col-sm-10″>

<button type=”submit” class=”btn btn-primary”>Submit</button>

</div>

</div>

</form>

</main>

BlogsList_view

<main role=”main” class=”container” style=”margin-top:100px;”>

<?php

$session = session();

if($session->getFlashdata(‘success’)){

echo ‘<div class=”alert alert-success” role=”alert”>’.$session->getFlashdata(‘success’).'</div>’;

}elseif($session->getFlashdata(‘error’)){

echo ‘<div class=”alert alert-danger” role=”alert”>’.$session->getFlashdata(‘error’).'</div>’;

} ?>

<div style=”margin:30px;text-align:right;”>

<a href=”<?php echo base_url(‘/Home_cnt/addNew’); ?>”><button type=”button” class=”btn btn-primary”>Add New</button></a>

</div>

<table class=”table table-hover”>

<thead>

<tr>

<th scope=”col”>Title</th>

<th scope=”col”>Description</th>

<th scope=”col”>Edit</th>

<th scope=”col”>Delete</th>

</tr>

</thead>

<tbody>

<?php foreach($postList as $listData){?>

<tr>

<th scope=”row”><?php echo $listData[‘blog_title’];?></th>

<td><?php echo $listData[‘blog_description’];?></td>

<td><a href=”<?php echo base_url(‘/Home_cnt/update’).”/”.$listData[‘blog_id’];?>”><button type=”button” class=”btn btn-secondary”>Edit</button></a> </td>

<td><a href=”<?php echo base_url(‘/Home_cnt/Delete’).”/”.$listData[‘blog_id’];?>”><button type=”button” class=”btn btn-danger”>Delete</button></a></td>

</tr>

<?php } ?>

</tbody>

</table>

</main>

EditBlog_view

<main role=”main” class=”container” style=”margin-top:100px;”>

<div style=”margin:30px;text-align:right;”>

<a href=””><button type=”button” class=”btn btn-primary”>Add New</button></a>

</div>

<form action=”<?php echo base_url(‘/Home_cnt/edit’).”/”.$BlogDetails[‘blog_id’]; ?>” method=”post”>

<div class=”form-group row”>

<label for=”inputEmail3″ class=”col-sm-2 col-form-label”>Email</label>

<div class=”col-sm-10″>

<input type=”text” class=”form-control” id=”title” name=”title” placeholder=”Title” value=”<?php echo $BlogDetails[‘blog_title’]; ?>”>

</div>

</div>

<div class=”form-group row”>

<label for=”inputPassword3″ class=”col-sm-2 col-form-label”>Description</label>

<div class=”col-sm-10″>

<textarea name=”description” class=”form-control” id=”” cols=”30″ rows=”10″><?php echo $BlogDetails[‘blog_description’]; ?></textarea>

</div>

</div>

<div class=”form-group row”>

<label for=”inputPassword3″ class=”col-sm-2 col-form-label”></label>

<div class=”col-sm-10″>

<button type=”submit” class=”btn btn-primary”>Submit</button>

</div>

</div>

</form>

</main>

Step9. Finally you have to made change in routes.php

Change the below 

Add the new route in routes.php for Home_cnt controller

$routes->get(‘/’, ‘Home_cnt::index’);

Comment out the old routes for the Home controller

//$routes->get(‘/’, ‘Home::index’);

Project screenshots.