Installing all your PHP libraries with Composer is a great way to save time. But larger projects automatically tested and run at each commit to your software version control (SVC) system will take a long time to install all the required packages from the Internet. You want to run your tests as soon as possible through your continuous integration (CI) system so that you have fast feedback and quick

composer.jsonの"require-dev"という仕組みには落とし穴があります。 使うときは十分気をつけましょう。 そもそも"require-dev"とは何か？ 本番環境で必要のない開発環境用のパッケージを記述する場合に使います。 { "require": { "symfony/http-foundation": "2.4.*", }, "require-dev": { "phpunit/phpunit": "3.7.*" } } 例えばこのように記述すると、本番では"http-foundation"のみを使い、開発環境ではそれに加えて"phpunit"も使う、というようなことが可能になります。 うっかり"require-dev"パッケージを呼び出すコードを書いてしまうと事故になる。 例えばプロジェクトでYAMLファイルを扱いたいと思って"symfony/yaml"を呼び出すコー

Composer has the option to load several dependencies only while being in development, so the tools will not be installed in production (on the live server). This is (in theory) very handy for scripts that only make sense in development, like tests, fake-data-tools, debugger, etc. The way to go is to add an additional require-dev block with the tools you need in dev: "require-dev": { "codeception/c