HTTP Meta Data [http-meta-data]

By default, the client sends some meta data about the HTTP connection using custom headers.

You can disable or enable it using the following methods:

Elastic Meta Header [_elastic_meta_header]

The client sends a x-elastic-client-meta header by default. This header is used to collect meta data about the versions of the components used by the client. For instance, a value of x-elastic-client-meta can be es=8.0.0-s,php=8.0.0,t=8.0.0-s,a=0,gu=7.4.2, where each value is the version of es=Elasticsearch, tis the transport version (same of client),a is asyncronouts (0=falseby default) andgu=Guzzle`.

If you would like to disable it you can use the setElasticMetaHeader() method, as follows:

php

$client = Elasticsearch\ClientBuilder::create()
    ->setElasticMetaHeader(false)
    ->build();