composer

Command	Description
composer install	优先使用依赖文件 composer.lock 去下载安装依赖库，如果 composer.lock 文件不存在，则会会根据 composer.json 去下载依赖库并安装，并且重新生成 composer.lock 文件
composer install --dry-run	模拟安装依赖

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注意：
composer.lock $1 被提交到版本控制仓库里. 可追踪其在版本库中的状态.
如果发生修改, 你应该执行composer install，使重新构建你本地的依赖.

Command	Description
composer update	Updates all packages
composer update --with-dependencies	Updates all packages and its dependencies
composer update vendor/package	Updates a certain package from vendor
composer update vendor/*	Updates all packages from vendor
composer update --lock	Updates composer.lock hash without updating any packages

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This command changes only the composer.lock file.

Command	Description
composer dumpautoload -o	Generates optimized autoload files

Command	Description
composer require vendor/package.	Adds package from vendor to composer.json's require section and installs it
composer require vendor/package --dev	Adds package from vendor to composer.json's require-dev section and installs it.

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This command changes both the composer.json and composer.lock files.

Command	Description
composer require vendor/pkg "1.3.2"	Installs 1.3.2
composer require vendor/pkg ">=1.3.2"	Above or equal 1.3.2
composer require vendor/pkg "<1.3.2"	Below 1.3.2
composer require vendor/pkg "1.3.*"	Latest of >=1.3.0 <1.4.0
composer require vendor/pkg "~1.3.2"	Latest of >=1.3.2 <1.4.0
composer require vendor/pkg "~1.3"	Latest of >=1.3.0 <2.0.0
composer require vendor/pkg "^1.3.2"	Latest of >=1.3.2 <2.0.0
composer require vendor/pkg "^1.3"	Latest of >=1.3.0 <2.0.0
composer require vendor/pkg "^0.3.2"	Latest of >=0.3.0 <0.4.0 (for pre-1.0)
composer require vendor/pkg "dev-BRANCH_NAME"	From the branch BRANCH_NAME

Command	Description
composer remove vendor/package	Removes vendor/package from composer.json and uninstalls it

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This command changes both the composer.json and composer.lock files.