Managing WordPress projects with Composer improves dependency management and automatic loading efficiency, especially for multi-plug-ins, themes, and custom development. 1. You can install WordPress core and plug-ins through johnpbloch/wordpress and wpackagist; 2. Use autoload configuration to achieve automatic loading of namespace classes; 3. Use Composer to introduce third-party libraries such as Guzzle, and manually introduce vendor/autoload.php; 4. It is recommended to place vendor in the root directory and ignore Git commits; 5. Perform composer update carefully in the production environment. After adapting to this process, project maintenance and expansion will be more convenient.
Using Composer to manage WordPress projects is actually much more practical than many people think. Especially when you are developing multiple plug-ins, themes or custom functions, Composer can help you manage dependencies and automatically load more efficiently.
However, WordPress itself is not designed according to the modern PHP framework, so you have to adjust your thinking a little when using Composer.
Here are some common ways to use it and suggestions:
Install WordPress dependencies
Although WordPress itself does not recommend installing core files through Composer (because the update mechanism is different), you can use johnpbloch/wordpress or wpackagist to install WordPress cores, plugins and themes.
For example, you can write it in composer.json
like this:
{ "require": { "johnpbloch/wordpress": "^6.0", "wpackagist-plugin/woocommerce": "^7.0" } }
Then run composer install
, WordPress and WooCommerce plugins will be downloaded to your project.
Note: This method is more suitable for local development or deployment process automation, and is not suitable for ordinary users to operate directly on the server.
Automatically load your custom code
If you are developing a complex theme or plug-in and use modern PHP features such as namespaces and class structures, the automatic loading function of Composer is very useful.
The method is very simple. Create a composer.json
file in your theme directory and configure autoload
:
{ "autoload": { "psr-4": { "MyTheme\\": "inc/" } } }
Then run composer dump-autoload
, and then you can directly use use MyTheme\SomeClass;
in the theme to call your class.
Manage third-party library dependencies
Some developers like to introduce external PHP libraries into WordPress themes or plug-ins, such as Guzzle and Monolog. Composer comes in handy at this time.
You just need to execute:
composer requires guzzlehttp/guzzle
Then use GuzzleHttp\Client;
in the code, and you can use it directly.
Don't forget to introduce vendor/autoload.php
into the theme or plugin, otherwise these classes will not take effect. for example:
require_once __DIR__ . '/vendor/autoload.php';
A few tips
- Avoid putting vendor in wp-content : this way it is easy to be deleted by mistake or scanned by plug-ins. It is recommended to be placed in the project root directory.
- Git ignores vendor directory : Do not submit
vendor
to Git unless you have special needs. - Be careful when using composer update : especially in production environments, it is best to test first and then update.
Basically that's it. Combining Composer and WordPress is not complicated, but it does require a little adaptation time, especially for traditional WordPress developers. Once you get used to it, you will find that maintenance projects and extension functions are much more convenient.
The above is the detailed content of How to use Composer with WordPress. For more information, please follow other related articles on the PHP Chinese website!

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