[[enabling_logger]] === Enabling the Logger Elasticsearch-PHP supports logging, but it is not enabled by default for performance reasons. If you wish to enable logging, you need to select a logging implementation, install it, then enable the logger in the Client. The recommended logger is https://github.com/Seldaek/monolog[Monolog], but any logger that implements the `PSR/Log` interface works. You might have noticed that Monolog was suggested during installation. To begin using Monolog, add it to your `composer.json`: [source,json] ---------------------------- { "require": { ... "elasticsearch/elasticsearch" : "~5.0", "monolog/monolog": "~1.0" } } ---------------------------- And then update your Composer installation: [source,shell] ---------------------------- php composer.phar update ---------------------------- Once Monolog (or another logger) is installed, you need to create a log object and inject it into the client: [source,php] ---- use Monolog\Logger; use Monolog\Handler\StreamHandler; $logger = new Logger('name'); $logger->pushHandler(new StreamHandler('path/to/your.log', Logger::WARNING)); $client = ClientBuilder::create() // Instantiate a new ClientBuilder ->setLogger($logger) // Set your custom logger ->build(); // Build the client object ----