如何装置?
官网地址：Composer (getcomposer.org)，目前集体看到的最新版为 2.4.4。
能够先尝试装置官网的介绍一步步操作：
Command-line installation
To quickly install Composer in the current directory, run the following script in your terminal. To automate the installation, use the guide on installing Composer programmatically.
留神：链接对应了类 Unix零碎的装置伎俩。
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"unlink('composer-setup.php'); } echo PHP_EOL;"php -r "if (hash_file('sha384', 'composer-setup.php') === '55ce33d7678c5a611085589f1f3ddf8b3c52d662cd01d4ba75c0ee0459970c2200a51f492d557530c71c15d8dba01eae') { echo 'Installer verified'; } else { echo 'Installer corrupt'; php composer-setup.phpphp -r "unlink('composer-setup.php');"集体在笔记 [[【PHP】PHP开发必备配置 - Windows]] 中提到过这个工具的装置，这里不再反复介绍。
Composer 命令
Composer 命令的常用命令如下：
查看Composer版本
composer --versin案例：
C:\Users\adong>composer --versionComposer version 2.4.4 2022-10-27 14:39:29降级将默认升到最新版本
composer self-update情谊提醒： 版本升级命令将会从官网版本去下载composer,phar镜像,速度将受限！强烈建议全局配置减速镜像
Composer 自我诊断
应用Composer 进行自我诊断的代码如下：
composer diagnose参考案例如下：
C:\Users\adong>composer diagnoseChecking platform settings: OKChecking git settings: OK git version 2.37.0Checking http connectivity to packagist: OKChecking https connectivity to packagist: OKChecking HTTP proxy: OKChecking github.com rate limit: OKChecking disk free space: OKChecking pubkeys:Tags Public Key Fingerprint: 57815BA2 7E54DC31 7ECC7CC5 573090D0 87719BA6 8F3BB723 4E5D42D0 84A14642Dev Public Key Fingerprint: 4AC45767 E5EC2265 2F0C1167 CBBB8A2B 0C708369 153E328C AD90147D AFE50952OKChecking composer version: OKComposer version: 2.4.4PHP version: 7.4.33PHP binary path: E:\Program Files\php74\php.exeOpenSSL version: OpenSSL 1.1.1s 1 Nov 2022cURL version: 7.70.0 libz 1.2.12 ssl OpenSSL/1.1.1szip: extension present, unzip not available, 7-Zip not available分明缓存
分明缓存的命令如下
composer clear具体案例如下：
C:\Users\adong>composer clearCache directory does not exist (cache-vcs-dir):Clearing cache (cache-repo-dir): C:\Users\adong\AppData\Local\Composer\repoClearing cache (cache-files-dir): C:\Users\adong\AppData\Local\Composer\filesClearing cache (cache-dir): C:\Users\adong\AppData\Local\ComposerAll caches cleared.我的项目更新 composer.lock
composer update --lock集体测试案例如下：
C:\Users\adong>composer update --lockComposer could not find a composer.json file in C:\Users\adongTo initialize a project, please create a composer.json file. See https://getcomposer.org/basic-usage调试
Composer调试只须要在命令前加上-vvv就能够打印出错信息
例如下载laravel命名为blog的我的项目
composer -vvv create-project laravel/laravel blog装置依赖包
装置依赖包须要在指定我的项目的根门路执行上面的操作：
composer install更新依赖包
该命令仅限在我的项目根目录操作
更新所有依赖包
composer update更新指定依赖包
composer update monolog/monolog更新多个指定依赖包
composer update monolog/monolog symfony/dependency-injection依据通配符匹配更新依赖包
composer update monolog/monolog symfony/*移除依赖包
移除指定依赖包
composer remove monolog/monolog依据通配符匹配移除依赖包
composer remove monolog/monolog symfony/*搜寻依赖包
搜寻依赖包：输入包及其形容信息
composer search monolog应用案例如下：
C:\Users\adong>composer search monologmonolog/monolog Sends your logs to files, sockets, inboxes, databases and various web servicessymfony/monolog-bundle Symfony MonologBundlesymfony/monolog-bridge Provides integration for Monolog with various Symfony componentssymfony/debug-bundle Provides a tight integration of the Symfony VarDumper component and the Serv...maxbanton/cwh AWS CloudWatch Handler for Monolog libraryeasycorp/easy-log-handler ! Abandoned ! A handler for Monolog that optimizes log me...theorchard/monolog-cascade Monolog extension to configure multiple loggers in the blink of an eye and a...bramus/monolog-colored-line-formatter Colored Line Formatter for Monologwazaari/monolog-mysql A handler for Monolog that sends messages to MySQLlogentries/logentries-monolog-handler A handler for Monolog that sends messages to Logentries.com.inpsyde/logzio-monolog Logz.io integration for Monolognewrelic/monolog-enricher Monolog components to enable New Relic Logscmdisp/monolog-microsoft-teams Monolog Handler for sending messages to Microsoft Teams using the Incoming W...inpsyde/wonolog Monolog-based logging package for WordPress.amphp/log Non-blocking logging for PHP based on Amp and Monolog.只搜寻包，能够增加 --only-name选项，如下所示
composer search --only-name monolog执行命令的返回后果较多：
依据通配符搜寻依赖包
composer search mono*案例如下：
C:\Users\adong>composer search mono*mead-steve/mono-snag Bugsnag integration for monolog. An abstract handler that sends messages to Bugsnagdigikraaft/mono-php PHP Implementation of Mono APIcodeat3/blade-mono-icons A package to easily make use of Mono Icons in your Laravel Blade views.yzen.dev/mono-processor This Processor will display in the logs bread crumbs by which you can more quickly and accurately identify the cause of the error.remdex/livehelperchat Live Helper Chat - live support for your website. Featuring web and desktop clients. Compatible Windows, Linux, Mac. Desktop client powered by QT. Supports mobile phones based on XMPP se...aedart/athenaeum Athenaeum is a mono repository; a collection of various PHP packagesdruidfi/mona-plugin Mona Composer Plugin for Drupal 7 sitesdbp/relay-mono-connector-payunity-bundle A PayUnity connector for the mono bundle for the Relay API gatewaydbp/relay-mono-connector-generic-bundle A generic connector for the mono payment bundle for the Relay API gatewaydbp/relay-mono-connector-campusonline-bundle A CO payment connector for the mono bundle for the Relay API gatewaydbp/relay-mono-bundle A payment bundle for the Relay API gatewaytimitao/monoaloicjazon/monodruidfi/mona ! Abandoned ! Example setup using mona-pluginvldmr-k/mono-acquiring Monobank Acquiring library查看依赖包
该命令仅限我的项目根目录应用
查看以后我的项目已装置的依赖包
composer show依据通配符以后我的项目进行筛选
composer show laravel*查看以后我的项目指定依赖包
composer show laravel/tinker