$config = array( 'DB_HOST' => 'localhost', 'DB_USER' => 'myusername', 'DB_PASS' => 'mypassword', 'DB_NAME' => 'mydatabase' ); // Save the configuration settings to a file file_put_contents('config.json', json_encode($config));
// Retrieve configuration settings from file $config = json_decode(file_get_contents('config.json'), true); // Change the database name $config['DB_NAME'] = 'newdatabase'; // Save the updated configuration back to the file file_put_contents('config.json', json_encode($config));This example shows how we can retrieve the configuration settings from the `config.json` file using the `file_get_contents` function and then decode the JSON string using `json_decode`. We can then make changes to the configuration as needed and save the updated settings back to the file using `file_put_contents`. The package library used for these code examples is the built-in PHP file system functions, which do not require any additional libraries or packages to be installed.