wp-config

Fluent configuration management for WordPress

$config = Config::make($rootDir)->bootstrapEnv();

$config
    ->env('WP_ENV', 'production')
    ->env('WP_HOME')
    ->set('WP_DEBUG', true)
    ->when($config->get('WP_ENV') === 'development', function($config) {
        $config
            ->set('SAVEQUERIES', true)
            ->set('SCRIPT_DEBUG', true);
    })
    ->apply();

• Fluent API for clean, chainable configuration
• Built-in environment variable loading via vlucas/phpdotenv
• Conditional configuration with when()
• Instance-scoped hook system for extensible configuration

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Requirements

• PHP >= 8.1
• Composer

Installation

composer require roots/wp-config:^2.0

Usage

Basic configuration

use Roots\WPConfig\Config;

$config = Config::make($rootDir)->bootstrapEnv();

$config
    ->set('WP_DEBUG', true)
    ->set('WP_HOME', 'https://example.com')
    ->apply();

Conditional configuration

$config
    ->env('WP_ENV', 'production')
    ->when($config->get('WP_ENV') === 'development', function($config) {
        $config
            ->set('WP_DEBUG', true)
            ->set('SAVEQUERIES', true)
            ->set('SCRIPT_DEBUG', true);
    });

Accessing values

$home = $config->get('WP_HOME');

// With a default value (no exception if key is missing)
$env = $config->get('WP_ENV', 'production');

$config
    ->set('WP_SITEURL', $config->get('WP_HOME') . '/wp')
    ->apply();

Environment variables

The Config class includes built-in support for loading environment variables:

$config->bootstrapEnv(); // Loads .env and .env.local files

$config
    ->env('DB_NAME')
    ->env('DB_USER')
    ->env('DB_HOST', 'localhost')
    ->apply();

Hook system

The Config class includes an instance-scoped hook system for extensible configuration:

// Register a hook
$config->addAction('security_setup', function($config) {
    $config->set('FORCE_SSL_ADMIN', true);
    $config->set('DISALLOW_FILE_EDIT', true);
});

// Execute the hook
$config
    ->set('WP_ENV', 'production')
    ->doAction('security_setup')
    ->apply();

Automatic before_apply hook

The Config class automatically executes any before_apply hooks when apply() is called. This enables packages to register configuration logic that runs automatically without requiring manual hook calls:

// Package authors can register automatic configuration
$config->addAction('before_apply', function($config) {
    // This runs automatically when apply() is called
    $config->set('AUTOMATIC_CONFIG', 'set by package');
});

// Users just need to call apply() - no manual hook management required
$config
    ->env('WP_HOME')
    ->set('WP_SITEURL', $config->get('WP_HOME') . '/wp')
    ->apply(); // Automatically runs all before_apply hooks

Upgrading from v1

Step 1: Update composer.json

{
  "require": {
    "roots/wp-config": "^2.0"
  }
}

Step 2: Replace static calls

Before:

Config::define('WP_DEBUG', true);
Config::define('WP_HOME', env('WP_HOME'));
Config::apply();

After:

$config = Config::make($rootDir);
$config
    ->set('WP_DEBUG', true)
    ->env('WP_HOME')
    ->apply();

Step 3: Consolidate environment files

Before:

// config/environments/development.php
Config::define('WP_DEBUG', true);
Config::define('SAVEQUERIES', true);

// config/application.php
Config::define('WP_HOME', env('WP_HOME'));
Config::apply();

After:

$config
    ->env('WP_ENV', 'production')
    ->env('WP_HOME')
    ->when($config->get('WP_ENV') === 'development', function($config) {
        $config
            ->set('WP_DEBUG', true)
            ->set('SAVEQUERIES', true);
    })
    ->apply();

Step 4: Update environment loading

Before:

$dotenv = Dotenv::createImmutable($rootDir);
$dotenv->load();

After:

$config = Config::make($rootDir)->bootstrapEnv();

Step 5: Update hook usage

Hooks are now instance methods instead of static methods:

Before:

Config::add_action('before_apply', function($config) { ... });

After:

$config->addAction('before_apply', function($config) { ... });

Removed APIs

• Config::remove() has been removed. Use when() blocks to conditionally set values instead.
• set() now overwrites previous values for the same key (useful in when() blocks for overriding defaults).

API reference

Config class

__construct(string $rootDir)

Creates a new Config instance with the specified root directory.

make(string $rootDir): static

Creates a new Config instance with a fluent-friendly named constructor.

bootstrapEnv(): self

Loads environment variables from .env files.

set(string|array $key, mixed $value = null): self

Sets a configuration value. Accepts a key/value pair or an associative array. Overwrites existing config map entries. Throws ConstantAlreadyDefinedException if a PHP constant with that name already exists.

env(string|array $key, mixed $default = null): self

Sets a configuration value from an environment variable. Falls back to $default if the variable is not set.

get(string $key, mixed $default = null): mixed

Gets a configuration value. Returns $default if the key is not set and a default is provided. Throws UndefinedConfigKeyException if the key is not set and no default is provided.

when(bool|Closure $condition, callable $callback): self

Conditionally executes configuration logic. The condition can be a boolean or a Closure that receives the Config instance.

apply(): void

Applies all configuration values by defining constants. Automatically runs before_apply hooks first.

addAction(string $tag, callable $callback, int $priority = 10): self

Adds a hook callback that can be executed later with doAction(). Returns $this for chaining.

doAction(string $tag, ...$args): self

Executes all callbacks registered for the specified hook. Returns $this for chaining.

Exceptions

• ConstantAlreadyDefinedException: Thrown when attempting to redefine a constant
• UndefinedConfigKeyException: Thrown when accessing an undefined configuration key without a default

Full example

A complete Bedrock-style application.php configuration file:

<?php

use Roots\WPConfig\Config;

$rootDir = dirname(__DIR__);
$webrootDir = $rootDir . '/web';

$config = Config::make($rootDir)->bootstrapEnv()
       ->doAction('config_loaded');

$config
    /**
     * DB settings
     */
    ->env(['DB_NAME', 'DB_USER', 'DB_PASSWORD'])
    ->env('DB_HOST', 'localhost')
    ->set([
        'DB_CHARSET' => 'utf8mb4',
        'DB_COLLATE' => '',
    ])
    ->doAction('database_configured')

    /**
     * URLs
     */
    ->env('WP_HOME')
    ->set('WP_SITEURL', $config->get('WP_HOME') . '/wp')
    ->doAction('urls_configured')

    /**
     * Environment
     */
    ->env('WP_ENV', 'production')
    ->set('WP_ENVIRONMENT_TYPE', $config->get('WP_ENV'))
    ->doAction('environment_loaded')

    /**
     * Content directory
     */
    ->set([
        'CONTENT_DIR' => '/app',
        'WP_CONTENT_DIR' => "{$webrootDir}/app",
        'WP_CONTENT_URL' => $config->get('WP_HOME') . '/app',
    ])

    /**
     * Authentication unique keys and salts
     */
    ->env([
        'AUTH_KEY', 'SECURE_AUTH_KEY', 'LOGGED_IN_KEY', 'NONCE_KEY',
        'AUTH_SALT', 'SECURE_AUTH_SALT', 'LOGGED_IN_SALT', 'NONCE_SALT',
    ])

    /**
     * Custom settings
     */
    ->set('AUTOMATIC_UPDATER_DISABLED', true)
    ->env('DISABLE_WP_CRON', false)
    ->set('DISALLOW_FILE_EDIT', true)
    ->env('DISALLOW_FILE_MODS', true)
    ->env('WP_POST_REVISIONS', true)

    /**
     * Performance settings
     */
    ->set('CONCATENATE_SCRIPTS', false)

    /**
     * Default debug settings
     */
    ->env('WP_DEBUG', false)
    ->set('WP_DEBUG_DISPLAY', false)
    ->set('WP_DEBUG_LOG', false)
    ->set('SCRIPT_DEBUG', false)

    /**
     * Development settings
     */
    ->when($config->get('WP_ENV') === 'development', function ($config) {
        $config->set([
            'SAVEQUERIES' => true,
            'WP_DEBUG' => true,
            'WP_DEBUG_DISPLAY' => true,
            'WP_DEBUG_LOG' => true,
            'WP_DISABLE_FATAL_ERROR_HANDLER' => true,
            'SCRIPT_DEBUG' => true,
            'DISALLOW_INDEXING' => true,
            'DISALLOW_FILE_MODS' => false,
        ]);
    })

    /**
     * Handle reverse proxy settings
     */
    ->when(
        isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https',
        function () { $_SERVER['HTTPS'] = 'on'; },
    )

    ->apply();

$config->doAction('after_apply');

$table_prefix = $_ENV['DB_PREFIX'] ?? 'wp_';

if (! defined('ABSPATH')) {
    define('ABSPATH', "{$webrootDir}/wp/");
}

require_once ABSPATH . 'wp-settings.php';

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