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This article will explain in detail how to install Composer and switch domestic resources. The content of the article is of high quality, so the editor will share it with you for reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

Composer is a tool used in PHP to manage dependency relationships. You can declare the dependent external libraries (libraries) in your project, and Composer will help you install these dependent library files. Composer requires PHP 5.3.2 + to run.

Windows installation Composer:

Preparatory work

Enable openssl support for PHP

Modify the configuration file php.ini

Add extension=php_openssl.dll extension

1. Download Composer

Download from the official website: https://getcomposer.org/download/

Select the executable location of php during installation

Check to see if the installation is successful

Enter cmd and enter composer

two。 Use Chinese mirrors

Composer config-g repo.packagist composer https://packagist.phpcomposer.com

3. Install the latest Composer resource plug-in

Composer global require "fxp/composer-asset-plugin:~1.1.1" CentOS7 install Composer

Preparatory work

Php version 5.3 and above, and make sure that the PHP CURL extension is available

1. Download the installation script-composer-setup.php-to the current directory

Php-r "copy ('https://install.phpcomposer.com/installer',' composer-setup.php');"

2. Perform the installation process

Php composer-setup.php

3. Delete the installation script

Php-r "unlink ('composer-setup.php');"

If you put composer.phar in the system's PATH directory, you can access composer.phar globally. In Unix-like systems, you can even use it without the php prefix. You can execute these commands to allow composer to make global calls on your system

Mv composer.phar / usr/local/bin/composer

Now you just need to run the composer command to use composer without typing php composer.phar.

4. Check whether Composer is working properly.

Composer

5. Use Chinese mirrors

Composer config-g repo.packagist composer https://mirrors.aliyun.com/composer/

6. Original image

Composer config-g repo.packagist composer https://repo.packagist.org

Little tips

Add the php environment variable / etc/profile if php is already installed when the php command cannot be used

Vi / etc/profile

Add at the end of the file

PATH=$PATH:/usr/local/php-7.1.3/bin/

And then restart.

Force deletion of extension

Composer remove shmilyzxt/yii2-queue-- ignore-platform-reqs update git tokencomposer config-g github-oauth.github.com ghp_4OBgl0T0hHnZDaPvnEaS7 or composer config-- global github-oauth.github.com ghp_rlWhLkLvzGJPjh2 install a specific version

After downloading the corresponding version of https://getcomposer.org/download/,

Mv composer.phar / usr/local/bin/composerchmod-R 777 / usr/local/bin/composer delete composerwhere composer or type composer to find the corresponding path, then rm drop composercomposer config-l-g | grep "home | dir"-E to find all the composer files on the machine and delete the error resolution

Installation failed, reverting. / composer.json to its original content.

Composer require topthink/think-worker=1.0.*-vvv

How to use Packagist image https://pkg.phpcomposer.com/

Haven't you installed Composer yet? Please read on how to install Composer.

Mirror usage

There are two ways to enable this mirror service:

System global configuration: add the configuration information to the global configuration file config.json of Composer. See "method one"

Individual project configuration: adds configuration information to the composer.json file of a project. See "method two"

Method 1: modify the global configuration file of composer (recommended)

Open a command line window (windows user) or console (Linux, Mac user) and execute the following command:

Copy

Composer config-g repo.packagist composer https://packagist.phpcomposer.com method 2: modify the composer.json configuration file of the current project:

Open a command line window (windows user) or console (Linux, Mac user), go to the root directory of your project (that is, the directory where the composer.json file is located), and execute the following command:

Copy

Composer config repo.packagist composer https://packagist.phpcomposer.com

The above command will automatically add the configuration information of the image at the end of the composer.json file in the current project (you can also add it manually):

Copy

"repositories": {"packagist": {"type": "composer", "url": "https://packagist.phpcomposer.com"}}"

Take the composer.json configuration file for the laravel project as an example, after executing the above command, it is as follows (note the last few lines):

Copy

{"name": "laravel/laravel", "description": "The Laravel Framework.", "keywords": ["framework", "laravel"], "license": "MIT", "type": "project", "require": {"php": "> = 5.5.9", "laravel/framework": "5.2.*"} "config": {"preferred-install": "dist"}, "repositories": {"packagist": {"type": "composer", "url": "https://packagist.phpcomposer.com"}"

OK, it's all done! Try composer install to experience flying speed!

Mirroring principle:

In general, the data of the installation package (mainly zip files) is downloaded from github.com, and the metadata of the installation package is downloaded from packagist.org.

However, due to well-known reasons, the connection speed of foreign websites is very slow and may be "walled" or even "non-existent" at any time.

What Packagist China full Mirror does is to cache all installation packages and metadata to domestic computer rooms and accelerate them through domestic CDN, so that there is no need to make requests to foreign websites, thus speeding up the process of composer install and composer update, and is faster and more stable. Therefore, even if packagist.org and github.com fail (mainly because the connection speed is too slow and blocked), you can still download and update the installation package.

Remove the mirror image:

If you need to remove the mirror and restore to the packagist official source, execute the following command:

Copy

Composer config-g-- unset repos.packagist

After execution, composer resets the source address using the default value (that is, the official source).

If you still need to use mirroring in the future, you only need to set the mirror address again according to the method described in the previous "Mirror usage".

Composer is a dependency management tool for PHP. It allows you to declare the code base on which the project depends, and it will install them for you in your project. Composer is not a package manager. It is managed on a per-project basis and installed in a directory of your project. By default, it does not install anything globally. Therefore, this is just a dependency management.

Composer will solve the problem for you like this:

A) you have a project that depends on several libraries.

B) some of these libraries depend on others.

C) you declare what you rely on.

D) Composer will find out which version of the package needs to be installed and install them (download them to your project).

Composer is multi-platform, and we strive to make it work equally well on Windows, Linux, and OSX platforms.

On how to install Composer and switch domestic resources to share here, I hope that the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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