To install the Yii framework, you need to configure PHP and Composer according to different operating systems. The specific steps are as follows: 1. You need to manually download PHP and configure environment variables on Windows, then install Composer, use commands to create a project and run a built-in server; 2. It is recommended to use Homebrew to install PHP and Composer, then create a project and start a development server; 3. Install PHP and extensions and Composer through apt on Linux, then create a project and deploy a formal environment with Apache or Nginx. The main differences between different systems are in the environment construction stage. Once PHP and Composer are ready, the subsequent processes are consistent. Pay attention to the permissions, paths and extensions enabled to complete the installation.

Installing the Yii framework is actually not difficult. The key is to prepare the environment according to your operating system and follow the steps step by step. Below I will divide it into three platforms (Windows, macOS, Linux) to briefly explain how to operate it.

Install Yii on Windows

Installing Yii on Windows is mainly to configure the PHP environment and Composer.

1. Install PHP
   Download and unzip the zip package of PHP for Windows . It is recommended to choose the Thread Safe version. Then add the decompressed path to the system environment variable PATH , so that you can run the php command on the command line.

2. Install Composer
   Visit getcomposer.org to download the Windows installer, and the environment will be automatically configured after running.

3. Create Yii Project
   Open the command prompt and run:

    composer create-project --prefer-dist yiisoft/yii2-app-basic basic

   This will create a basic Yii project in the current directory.

4. Run the test server
   Enter the project directory and execute:

    php yii serve

   By default, the development server will be started at localhost:8080 .

Install Yii on macOS

macOS comes with PHP, but the version may be older, so it is recommended to use Homebrew to manage it.

1. Install Homebrew (if not installed yet)
   Run in the terminal:

    /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

2. Install PHP and Composer
   Install using Homebrew:

    brew install php
   brew install composer

3. Create Yii Project
   Like Windows, use Composer to create projects:

    composer create-project --prefer-dist yiisoft/yii2-app-basic basic

4. Run the built-in server

    cd basic
   php yii serve

Open http://localhost:8080 in the browser and you will see the welcome page.

Install Yii on Linux (taking Ubuntu as an example)

Ubuntu users can easily install related components through apt.

1. Install PHP and common extensions

    sudo apt update
   sudo apt install php php-cli php-mbstring php-xml php-mysql

2. Install Composer

    sudo apt install composer

3. Create Yii app

    composer create-project --prefer-dist yiisoft/yii2-app-basic basic

4. Start the development server

    cd basic
   php yii serve

If you plan to deploy a formal environment, it is recommended to configure the virtual host with Apache or Nginx.

Basically these are the steps. The differences between different systems are mainly reflected in the environment construction. Once Composer and PHP are ready, the subsequent processes are almost the same. As long as you pay attention to whether permissions, paths and extensions are enabled, you will generally not encounter too many problems.

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