Working with Cassandra in native PHP

When working with Cassandra in native PHP, you'll typically use a driver like php-cassandra to interact with the Cassandra database. Here's a basic example of how you can ensure data replication using native PHP:

1. Install php-cassandra:

composer require datastax/php-driver

2. Establish Connection and Configure Replication:

<?php
// Load the Composer autoloader
require_once 'vendor/autoload.php';

// Cassandra connection configuration
$cluster   = Cassandra::cluster()->build();
$session   = $cluster->connect();

// Keyspace configuration with replication
$keyspace  = 'your_keyspace';
$replicationFactor = 2; // Adjust according to your requirements

// Create keyspace with replication strategy
$query = sprintf(
    "CREATE KEYSPACE IF NOT EXISTS %s WITH replication = {'class': 'SimpleStrategy', 'replication_factor': %d}",
    $keyspace,
    $replicationFactor
);
$session->execute(new Cassandra\SimpleStatement($query));

// Set the keyspace for further queries
$session->execute(new Cassandra\SimpleStatement("USE $keyspace"));

// Example: Create a table (replace with your table structure)
$tableQuery = "
    CREATE TABLE IF NOT EXISTS your_table (
        id UUID PRIMARY KEY,
        name VARCHAR
    )
";
$session->execute(new Cassandra\SimpleStatement($tableQuery));

// Example: Insert data (replace with your data)
$insertQuery = "
    INSERT INTO your_table (id, name) VALUES (uuid(), 'John Doe')
";
$session->execute(new Cassandra\SimpleStatement($insertQuery));

// Close the connection
$cluster->shutdown();

3. Testing Replication:

1. Check the Cassandra cluster status using the nodetool command in the Cassandra installation directory:

   nodetool status
   

   Ensure all nodes are up and running.

2. Monitor replication using nodetool:

   nodetool describecluster
   

   Verify that the replication factor matches the configuration.

Note: The above code is a basic example. You should replace your_keyspace and your_table with your actual keyspace and table names. Additionally, handle exceptions and errors appropriately in a production environment.

This is a basic example, and for a more comprehensive solution, consider using a framework or library like Symfony with Doctrine when working with databases in PHP projects. These tools provide abstractions and features that simplify database interactions and replication handling.