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如何在AlmaLinux 8上安装Composer

• 技术教程

Composer是流行的PHP依赖性管理器。它起某种项目管理器的作用，可以帮助程序员管理将在项目间使用的依赖项。Composer-logo

在AlmaLinux 8上安装Composer

步骤1.首先，让我们首先确保您的系统是最新的。

sudo dnf update
sudo dnf install epel-release

第2步。安装PHP。

运行以下命令以安装PHP CLI（命令行界面）程序包和所有其他依赖项：

sudo dnf install @php

步骤3.在AlmaLinux上安装Composer 8。

安装PHP CLI后，下载Composer安装程序脚本：

wget https://getcomposer.org/installer -O composer-installer.php

下载安装程序后，我们可以使用以下命令在AlmaLinux系统上安装Composer：

php composer-installer.php --filename=composer --install-dir=/usr/local/bin

安装完成后，验证PHP Composer版本：

composer --version

输出：

[root@idroot.us ~]# composer --version
Composer version 2.0.11 2021-05-07 14:11:22

要查看使用情况页面，请使用：

$ composer
   ______
  / ____/___  ____ ___  ____  ____  ________  _____
 / /   / __ \/ __ `__ \/ __ \/ __ \/ ___/ _ \/ ___/
/ /___/ /_/ / / / / / / /_/ / /_/ (__  )  __/ /
\____/\____/_/ /_/ /_/ .___/\____/____/\___/_/
                    /_/
Composer version 2.0.11 2021-05-07 14:12:04

Usage:
  command [options] [arguments]

Options:
  -h, --help                     Display this help message
  -q, --quiet                    Do not output any message
  -V, --version                  Display this application version
      --ansi                     Force ANSI output
      --no-ansi                  Disable ANSI output
  -n, --no-interaction           Do not ask any interactive question
      --profile                  Display timing and memory usage information
      --no-plugins               Whether to disable plugins.
  -d, --working-dir=WORKING-DIR  If specified, use the given directory as working directory.
      --no-cache                 Prevent use of the cache
  -v|vv|vvv, --verbose           Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug

Available commands:
  about                Shows the short information about Composer.
  archive              Creates an archive of this composer package.
  browse               Opens the package's repository URL or homepage in your browser.
  check-platform-reqs  Check that platform requirements are satisfied.
  clear-cache          Clears composer's internal package cache.
  clearcache           Clears composer's internal package cache.
  config               Sets config options.
  create-project       Creates new project from a package into given directory.
  depends              Shows which packages cause the given package to be installed.
  diagnose             Diagnoses the system to identify common errors.
  dump-autoload        Dumps the autoloader.
  dumpautoload         Dumps the autoloader.
  exec                 Executes a vendored binary/script.
  global               Allows running commands in the global composer dir ($COMPOSER_HOME).
  help                 Displays help for a command
  home                 Opens the package's repository URL or homepage in your browser.
  i                    Installs the project dependencies from the composer.lock file if present, or falls back on the composer.json.
  info                 Shows information about packages.
  init                 Creates a basic composer.json file in current directory.
  install              Installs the project dependencies from the composer.lock file if present, or falls back on the composer.json.
  licenses             Shows information about licenses of dependencies.
  list                 Lists commands
  outdated             Shows a list of installed packages that have updates available, including their latest version.
  prohibits            Shows which packages prevent the given package from being installed.
  remove               Removes a package from the require or require-dev.
  require              Adds required packages to your composer.json and installs them.
  run                  Runs the scripts defined in composer.json.
  run-script           Runs the scripts defined in composer.json.
  search               Searches for packages.
  self-update          Updates composer.phar to the latest version.
  selfupdate           Updates composer.phar to the latest version.
  show                 Shows information about packages.
  status               Shows a list of locally modified packages, for packages installed from source.
  suggests             Shows package suggestions.
  u                    Upgrades your dependencies to the latest version according to composer.json, and updates the composer.lock file.
  update               Upgrades your dependencies to the latest version according to composer.json, and updates the composer.lock file.
  upgrade              Upgrades your dependencies to the latest version according to composer.json, and updates the composer.lock file.
  validate             Validates a composer.json and composer.lock.
  why                  Shows which packages cause the given package to be installed.
  why-not              Shows which packages prevent the given package from being installed.

恭喜你！您已经成功安装了Composer。感谢您使用本教程在AlmaLinux 8系统上安装Composer。如需其他帮助或有用信息，建议您查看Composer官方网站。

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