# Enabling the Redis extension for PHP

> Turn on the Redis PHP extension in cPanel's Select PHP Version and configure apps like Laravel or WordPress to use it.

Source: https://helpcenter.ruachost.com/apps/guides/enabling-the-redis-extension-for-php/

**Redis** is an in‑memory data structure store often used as a cache or session handler to improve application performance. To use Redis with PHP applications (like Laravel, WordPress, or Magento) on **ruachost.com**, you need to enable the Redis extension.

## Why Enable Redis?

- Provides faster caching and session management.
- Reduces database load by storing frequently accessed data in memory.
- Improves scalability for high‑traffic websites.
- Compatible with all **ruachost.com** hosting accounts.

## Steps to Enable Redis Extension for PHP

### 1. Check PHP Version

- Log in to **cPanel** at **ruachost.com**.
- Go to **Select PHP Version** under the **Software** section.
- Confirm your PHP version supports Redis (PHP 7.4+ recommended).

### 2. Enable Redis via PHP Selector

- In **Select PHP Version**, look for the **redis** extension in the list.
- Check the box next to **redis**.
- Click **Save** to apply changes.

### 3. Verify Redis Installation

- Create a `phpinfo.php` file in your `public_html` directory:

  ```
  <?php phpinfo(); ?>
  ```
- Visit `http://example.com/phpinfo.php`.
- Search for **redis** in the output.
- If enabled, you’ll see Redis extension details.

### 4. Configure Redis in Your Application

- For **Laravel**:

  - Update `.env` file:

    ```
    CACHE_DRIVER=redis
    SESSION_DRIVER=redis
    REDIS_HOST=127.0.0.1
    REDIS_PASSWORD=null
    REDIS_PORT=6379
    ```
- For **WordPress**:

  - Install a Redis plugin (e.g., *Redis Object Cache*).
  - Add to `wp-config.php`:

    ```
    define('WP_REDIS_HOST', '127.0.0.1');
    define('WP_REDIS_PORT', 6379);
    ```

### 5. Test Redis Connection

- Run a simple PHP script:

  ```
  <?php
  $redis = new Redis();
  $redis->connect('127.0.0.1', 6379);
  echo "Connection to Redis successful!";
  ?>
  ```
- If successful, Redis is ready for use.

> **Note:**
- Redis must be running on the server for the PHP extension to connect.
- On shared hosting, Redis may be enabled globally by **ruachost.com** administrators.
- Always restart PHP‑FPM after enabling new extensions.