ElasticEmailPHP is a PHP Library for interacting with Elastic Email platform API.
$elasticEmail = new \ElasticEmail\ElasticEmail('your_elastic_api_key');
$elasticEmail->email()->send([
'to' => 'to_email',
'subject' => 'subject',
'from' => 'from_email'
]);
See integration tests for more examples.
Using composer
composer require rdok/elasticemail-php