How to use the CodeIgniter framework in PHP-PHP Tutorial-php.cn

Home

Backend Development

PHP Tutorial

How to use the CodeIgniter framework in PHP

王林

Jun 27, 2023 am 10:33 AM

php codeigniter frame

CodeIgniter is an open source lightweight PHP framework that is widely used in the development of web applications. CodeIgniter supports the MVC (Model-View-Controller) design pattern and has a series of functions such as efficient URL routing, secure form processing, database abstraction layer, libraries and auxiliary functions.

This article will introduce how to use the CodeIgniter framework in PHP.

1. Install and configure the CodeIgniter framework

First, download the latest version of the CodeIgniter framework source code from the official website https://codeigniter.com/. Unzip the source code to the directory where the project is located, and rename the folder to "ci" (this article uses "ci" as an example).

In order for the CodeIgniter framework to work properly, we need to create the "index.php" file in the project root directory and add the following code to the file:

<?php
    define('BASEPATH',__DIR__.'/ci/system/');
    define('APPPATH',__DIR__.'/ci/application/');
    require_once BASEPATH.'core/CodeIgniter.php';

Copy after login

Code explanation:

__DIR__ is a magic constant in PHP that points to the absolute path to the directory where the current script file is located.
BASEPATHConstant defines the path where the CodeIgniter framework core file is located.
APPPATHConstant defines the path where the CodeIgniter application files are located.
Call the require_once function to load the CodeIgniter core file.

2. Create controllers and views

In the CodeIgniter framework, controllers are important components that operate business logic and respond to requests. Create a new controller file, "test.php" in the "application/controllers" directory under the project root directory (this article uses "test" as an example).

Define a method named "index" in the controller as follows:

<?php
    class Test extends CI_Controller {
        public function index() {
            $data['title'] = "欢迎使用CodeIgniter";
            $data['content'] = "这是一篇CodeIgniter框架的教程";
            $this->load->view('welcome_message', $data);
        }
    }

Copy after login

Code explanation:

class Test extends CI_Controller indicates that the Test class inherits from the Controller core class defined in CodeIgniter.
public function index() Defines an index method of the Test controller, which will be automatically executed when the controller is called.
$dataThe array contains the data to be passed to the view, that is, the title and content.
$this->load->view('welcome_message', $data);Method passes data to the view.

Next, we need to create a view file named "welcome_message.php" in the "application/views" directory. In this file, we can display the title and content through the data in the $data array.

As shown below:

<!DOCTYPE html>
<html>
<head>
    <title><?php echo $title; ?></title>
</head>
<body>
    <h1><?php echo $title; ?></h1>
    <p><?php echo $content; ?></p>
</body>
</html>

Copy after login

Code explanation:

<?php echo $title; ?>and <?php echo $content; ?> are used to output the title and content respectively.

3. Start the CodeIgniter framework

Now that we have prepared the controller and view, we can start the CodeIgniter framework and view the results. Enter http://localhost/index.php/test in the browser and you will see that the page outputs the title and content we defined in the view.

If you do not want to enter "index.php" in the URL, you can modify the following configuration items in the "config.php" file in the "application/config" directory:

1	`$config['index_page'] =` `'';`

Copy after login

Change "index_page "Set the value to an empty string to hide "index.php".

Summary

This article briefly introduces how to use the CodeIgniter framework in PHP. Developers can quickly build Web applications through the CodeIgniter framework, enabling code reuse and rapid iteration of Web applications. Through the CodeIgniter framework, a series of functions such as MVC design pattern, secure form processing, and database abstraction layer can be implemented, which allows developers to focus on the implementation of business logic without worrying about the processing of underlying details.

The above is the detailed content of How to use the CodeIgniter framework in PHP. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

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

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)

3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

R.E.P.O. Best Graphic Settings

3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Assassin's Creed Shadows: Seashell Riddle Solution

2 weeks ago By DDD

R.E.P.O. How to Fix Audio if You Can't Hear Anyone

3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

WWE 2K25: How To Unlock Everything In MyRise

3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

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

Where is the login entrance for gmail email?

7464

CakePHP Tutorial

1376

What is the format of the account name of steam

win11 activation key permanent

nyt connections hints and answers

Related knowledge

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

CakePHP Working with Database Sep 10, 2024 pm 05:25 PM

Working with database in CakePHP is very easy. We will understand the CRUD (Create, Read, Update, Delete) operations in this chapter.

CakePHP Date and Time Sep 10, 2024 pm 05:27 PM

To work with date and time in cakephp4, we are going to make use of the available FrozenTime class.

CakePHP File upload Sep 10, 2024 pm 05:27 PM

To work on file upload we are going to use the form helper. Here, is an example for file upload.

Discuss CakePHP Sep 10, 2024 pm 05:28 PM

CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu

CakePHP Creating Validators Sep 10, 2024 pm 05:26 PM

Validator can be created by adding the following two lines in the controller.

CakePHP Logging Sep 10, 2024 pm 05:26 PM

Logging in CakePHP is a very easy task. You just have to use one function. You can log errors, exceptions, user activities, action taken by users, for any background process like cronjob. Logging data in CakePHP is easy. The log() function is provide

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

See all articles