要檢查Composer是否正確安裝，首先運行composer --version命令查看版本信息，若顯示版本號則表示已安裝。其次使用composer diagnose命令檢測配置問題，確保環(huán)境變量和權(quán)限正常。最后嘗試通過composer require monolog/monolog安裝包驗證功能完整性，若成功創(chuàng)建vendor目錄并下載依賴，則說明Composer完全可用。若上述步驟失敗，可能需檢查PHP是否已全局安裝或調(diào)整系統(tǒng)路徑設(shè)置。

You can tell if Composer is installed correctly by running a simple command in your terminal or command prompt. If it’s working, you’ll see version info and a list of available commands.

Check the Composer Version

The quickest way to verify Composer is to ask it for its version. Just type:

composer --version

If you see something like Composer version 2.x.x, then it’s installed and working. If not, you might get an error like command not found or 'composer' is not recognized, which means it's either not installed or not in your system path.

A common issue on some systems (especially Windows) is that the environment variables aren't set up right after installing XAMPP or WAMP. In that case, try running Composer from the installation directory or re-run the setup with the “enable command-line” option.

Run a Basic Composer Command

Another good test is to run a basic Composer command like:

composer diagnose

This checks for common issues in your setup and reports them. It doesn’t change anything—it just tells you what might be off. For example, it might warn you if your vendor/bin directory isn’t in the PATH or if there are permission problems.

If everything looks green and clean, Composer is probably ready to use.

Try Initializing a New Project

A more practical test is to create a new project using a standard package. You can do this by creating a test folder and running:

mkdir testproject && cd testproject
composer require monolog/monolog

This downloads and installs the Monolog library into your vendor folder. If it completes without errors and creates the vendor/ directory and composer.json, then Composer is fully functional.

If it fails, double-check your PHP installation—Composer relies on PHP being available in the command line. You can confirm that by typing:

php -v

And seeing if PHP reports a version number.

That’s basically all there is to checking if Composer works. If the version shows up, diagnosis passes, and you can install a package, you’re good to go. Any issues usually come down to path settings or PHP not being available globally.

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