Composer

Composer is a dependency manager for PHP that simplifies the management of libraries and dependencies in PHP projects. It is designed to cater to the needs of web developers, software engineers, PHP developers, IT professionals, and e-commerce companies. According to the vendor, Composer offers a comprehensive solution for managing dependencies in PHP projects, making it suitable for businesses of various sizes.

Key Features

Dependency management: According to the vendor, Composer allows users to declare project dependencies and handles the installation and updating of libraries on a per-project basis, ensuring efficient and consistent dependency management.

System Requirements: Composer requires PHP 7.2.5 or later to run, with a long-term-support version offering support for legacy PHP versions. It integrates with various version control systems and relies on supporting applications for file decompression, as per the vendor's documentation.

Installation - Linux / Unix / macOS: Composer provides a convenient installer that checks PHP settings and downloads the Composer binary to the working directory. It offers both local and global installation options, as stated by the vendor.

Installation - Windows: According to the vendor, Composer provides an installer that sets up the PATH for easy access from any directory in the command line. Alternatively, Windows users can opt for manual installation by downloading the Composer binary and configuring the PATH environment variable.

Docker Image: Composer is available as a Docker container, allowing users to pull the composer/composer image and run it to install packages. It can also be integrated into existing Dockerfiles by copying the binary file from pre-built images, as per the vendor's documentation.

Using Composer: After installation, Composer allows users to declare dependencies in a composer.json file and automatically installs the required packages for the project. The composer.lock file ensures consistent installations across different environments, according to the vendor.

Libraries: Composer manages libraries on a per-project basis, resolving and installing the required versions. Libraries are installed within the project's directory, providing a structured organization, as stated by the vendor.

Command-line interface / Commands: Composer provides a command-line interface with various commands for package management. Common commands include install, update, require, remove, and show, offering flexibility and control over project dependencies, according to the vendor's documentation.

The composer.json schema: Composer follows a specific schema in the composer.json file, which includes project information, dependencies, autoload settings, and scripts. This schema ensures consistency and compatibility across Composer projects, as per the vendor's documentation.

Repositories: Composer supports different types of repositories for package discovery, including Packagist (a default package repository) and custom repositories. Users can prioritize repositories for package installation, providing flexibility in sourcing packages, according to the vendor's documentation.