对于Windows:)

composer update
composer self-update 

你被要求获得用户许可

还有一个命令:

composer require that_extention_you_want 

(而不是第一个:PHP composer。phar that_extention_you_want)

你的作曲家。法尔应放在上述方式。

与我的工作，你只需要文件编写器。Phar和作曲家。Json在当前项目中。 命令为

php composer.phar update 

朋友们，请按照以下步骤在MAC OS中修复此问题

Step 1: first run the command in Terminal with your project directory $ curl -sS https://getcomposer.org/installer | php Step 2: Move the composer.phar in your project directory $ mv composer.phar /Applications/MAMP/htdocs/bashrushAPI/composer.phar Step 3: Setup alias the composer $ alias composer='/Applications/MAMP/htdocs/bashrushAPI/composer.phar' Step 4: Check the composer version now $ composer --version Composer version 1.7.2 2018-08-16 16:57:12 Step 5: Confirm the project folders and file placed on bellow $ ls CONTRIBUTING.md docker-compose.yml templates README.md logs tests composer.json phpunit.xml vendor composer.lock public composer.phar src Step 6: Now update composer $ composer.phar update Loading composer repositories with package information Updating dependencies (including require-dev) Nothing to install or update Generating autoload files Step 7: Run your sample project $ php composer.phar start php -S localhost:8080 -t public [Thu Sep 27 03:16:11 2018] ::1:51177 [200]: / [Thu Sep 27 03:16:11 2018] ::1:51178 [404]: /favicon.ico - No such file or directory

对于通过HomeBrew安装composer的google用户: 为/usr/local/bin/composer创建一个符号链接

ln -s /usr/local/bin/composer /usr/local/bin/composer.phar

我知道我的回答对于嵌入式QNAP服务器来说可能太具体了，但我在这里尝试安装Yii:

对我来说，通过PuTTY在QNAP NAS中，在尝试了以上所有技巧后，更新PATH无效，唯一有效的cmd行是:

 /mnt/ext/opt/apache/bin/php /usr/local/bin/composer create-project yiisoft/yii2-app-basic basic

当然，要相应地调整你的路径……

如果我使用哪个composer，我有一个正确的答案，但如果我使用哪个php，没有任何返回。

除此之外，试着逃跑

/mnt/ext/opt/apache/bin/php composer create-project yiisoft/yii2-app-basic

或指

composer.phar

也没用……