Production environment deployment: How to avoid Composer loading development dependencies?

Streamline Composer dependencies: Excluding development dependencies in production environment

In PHP project development, Composer is an indispensable dependency management tool. We often list development tools and libraries in the require-dev section, but in production environments, these libraries are usually redundant. This article will explain how to avoid loading these development dependencies in a production environment, thereby optimizing project size and deployment efficiency.

Problem: Development dependencies are mistakenly entered into production environment

Suppose your composer.json file contains the following dependencies:

 {
    "require": {
        "php": ">=5.6",
        "baidu/aip-sdk": "^2.2"
    },
    "require-dev": {
        "dealerdirect/phpcodesniffer-composer-installer": "^0.7.0",
        "php-parallel-lint/php-parallel-lint": "^1.2.0"
    }
}

dealerdirect/phpcodesniffer-composer-installer and php-parallel-lint/php-parallel-lint are only used for code inspection and other work in the development stage, but they are also installed in the vendor directory, increasing the project size. How to install only the dependencies required by the production environment?

Solution: Accurate installation, optimized loading

To install only production environment dependencies and optimize the autoloader, use the following Composer command:

 composer install --no-dev --optimize-autoloader

The --no-dev option instructs Composer to ignore dependencies in require-dev and install only dependencies listed in require section. --optimize-autoloader option optimizes the automatic loader to improve application loading speed. After executing this command, your vendor directory will only contain the necessary production dependencies, thereby reducing the project size.

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