How to use CodeIgniter5 framework in php?
CodeIgniter is a lightweight PHP framework that adopts MVC architecture to support rapid development and simplify common tasks. CodeIgniter 5 is the latest version of the framework and offers many new features and improvements. This article will introduce how to use the CodeIgniter 5 framework to build a simple web application.
Step 1: Install CodeIgniter 5
Downloading and installing CodeIgniter 5 is very simple, just follow these steps:
- Download the latest version of CodeIgniter 5 from the official GitHub repository.
- Extract the downloaded archive and place the CodeIgniter directory in the root directory of the web server.
- Run the composer install command to download and install all dependencies.
Now that we have CodeIgniter 5 installed, let’s start creating a new application.
Step 2: Create a new application
Start the web browser and enter the following address: http://localhost/CodeIgniter-5/public/, the CodeIgniter welcome page will be displayed on the screen. This indicates that we have successfully installed the CodeIgniter framework.
Next, we need to create a new application. To do this, follow the steps below:
- Go to the CodeIgniter directory and then the applications directory.
- In the applications directory, create a new directory and give it an appropriate name. For example, my application name is "MyApp".
- In the newly created directory, create three subdirectories: controllers, views, and models.
- Create a new controller file in the controllers directory and name it Main.php. This is the default controller we will use.
Now that we have created our new application, we will write the code to define the controllers and views.
Step 3: Write the Controller Code
Open the Main.php file we created in the previous step and add the following PHP code:
<?php
namespace MyAppControllers;
use CodeIgniterController;
class Main extends Controller
{
public function index()
{
$data = array('title' => '欢迎来到CodeIgniter 5!');
return view('welcome_message', $data);
}
}This code will define a A controller named Main and inheriting it from CodeIgniter's base controller. The controller contains a method called index, which will render a view file called welcome_message and pass an array parameter called "$data".
Step 4: Write the view file
In our view directory, create a new PHP file named welcome_message.php. Then add the following code:
<!DOCTYPE html>
<html>
<head>
<title><?= $title ?></title>
</head>
<body>
<h1><?= $title ?></h1>
<p>恭喜，你现在已经成功使用了CodeIgniter 5框架！</p>
</body>
</html>This code will define a simple HTML page with a title and some text content. The title of the page will be obtained from the array parameter named "$data".
Step 5: Test the Application
Once we have defined the controller and view files, we can use CodeIgniter 5’s routing system to test our application. To test your application, follow these steps:
- Open the URL of the default controller we created in step 2. In our example, the URL would look like this: http://localhost/CodeIgniter-5/public/MyApp.
- If everything is fine, your web browser will load the view file we created in step 4, and it will display a title and some text content.
Congratulations, you have successfully created a simple web application using the CodeIgniter 5 framework.
Conclusion
This article introduces how to use the CodeIgniter 5 framework to create a simple web application. We learned how to install the CodeIgniter 5 framework, create a new application, and define controller and view files. The CodeIgniter framework is a very powerful and useful tool that can help us develop web applications quickly while also providing many different features and tools. If you want to learn more about the CodeIgniter framework, please visit the official documentation and community forums.
The above is the detailed content of How to use CodeIgniter5 framework in php?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1390
52
PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian
Dec 24, 2024 pm 04:42 PM
PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati
7 PHP Functions I Regret I Didn't Know Before
Nov 13, 2024 am 09:42 AM
If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op
How To Set Up Visual Studio Code (VS Code) for PHP Development
Dec 20, 2024 am 11:31 AM
Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
How do you parse and process HTML/XML in PHP?
Feb 07, 2025 am 11:57 AM
This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an
PHP Program to Count Vowels in a String
Feb 07, 2025 pm 12:12 PM
A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases?
Apr 03, 2025 am 12:03 AM
What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
