Shulou(Shulou.com)06/02 Report--

Editor to share with you how to use Composer, I hope you will get something after reading this article. Let's discuss it together.

The use of Composer

1. Download the composer.phar file

From the project root, use cmd or bash to run the following command: (need to install PHP)

Php-r "readfile ('https://getcomposer.org/installer');" | php

two。 Initialize Composer

Use cmd or bash to run the following command, and after entering the appropriate information, complete the initialization of composer:

Composer init

A configuration file named composer.json is added to the root directory.

3. Add the class file written by yourself to the automatic loading of composer

Suppose some of the class files are in the folder. / app/db/, and the namespace db is defined. The following items should be added to the first curly braces in the composer.json file:

"autoload": {"psr-4": {"db\": "app/db/"}}

The entire composer.json file looks like this:

{"name": "linnzh/front", "type": "project", "license": "MIT", "authors": [{"name": "Linnzh", "email": "reg.lynnzh@gmail.com"}], "description": "some attempts on the front end", "require": {} "require-dev": {}, autoload: {"psr-4": {"db\": "db/"}

This key-value pair indicates that the composer loader loads the component as psr-4 and tells the loader that the class files in the app/db/ directory will be mapped to the namespace db.

4. Update configuration

After you modify the composer.json file, you must run the following command to generate the vendor/autoload.php file:

Composer install

A vender folder is generated under the root of the project and contains an autoload.php auto-load class file that can be imported directly when using a class file that is defined and configured in composer.json without having to use multiple require statements.

After reading this article, I believe you have a certain understanding of "how to use Composer". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for reading!

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