安裝Composer只需幾個步驟，適用於Windows、macOS和Linux。 Windows用戶應下載Composer-Setup.exe並運行，確保PHP已安裝或使用XAMPP；macOS用戶需通過終端依次執(zhí)行下載、驗證、全局安裝命令；Linux用戶操作與macOS類似，使用相應包管理器安裝PHP後下載並移動Composer文件至全局目錄即可。

You just need a few steps to install Composer on your system, no matter if it's Windows, macOS, or Linux. It's straightforward once you know what to do.

Installing Composer on Windows

The easiest way is to use the Windows installer. You can download it directly from the official Composer website. Here's how:

• Make sure PHP is installed and available in your command line. If not, you might want to install XAMPP or similar tools that include PHP.
• Download the Composer-Setup.exe file from getcomposer.org .
• Run the installer — it will automatically detect your PHP setup and configure everything for you.

If you're having trouble with PATH variables or PHP not being recognized, try installing XAMPP first and make sure php is accessible globally via the command line.

Setting up Composer on macOS

macOS users usually rely on the command line to install Composer. The process is simple if you have PHP already set up.

1. Open Terminal.
2. Run this command:

    php -r "copy('http://ipnx.cn/link/521eae94653641ec7be496db736ce3f6installer', 'composer-setup.php');"

3. Then verify the installer (optional but recommended):

    php -r "if (hash_file('sha384', 'composer-setup.php') === 'EXPECTED_HASH') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"

4. Install Composer globally:

    php composer-setup.php  
   mv composer.phar /usr/local/bin/composer

If you get permission issues when moving files, use sudo before the command.

How to Install Composer on Linux

Linux installation is very similar to macOS since both are Unix-based systems.

• First, confirm PHP is installed by running php --version . If not, install PHP using your distro's package manager (like apt for Ubuntu or dnf for Fedora).
• Next, fetch the installer:

   php -r "copy('http://ipnx.cn/link/521eae94653641ec7be496db736ce3f6installer', 'composer-setup.php');"

• Check the hash as shown above (same method as macOS).
• Run the installer and move Composer to a global location:

   php composer-setup.php  
  sudo mv composer.phar /usr/local/bin/composer

Once done, test it by typing composer in the terminal.

Composer should now be working across all major operating systems. Just remember to keep your PHP version compatible with the latest Composer requirements. That's basically it — nothing too complicated, but sometimes easy to mess up a step if you're new.

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