Abstraction of the spotify web-abi (aka metadata api) - https://developer.spotify.com/technologies/web-api/
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##Example
It is very simple to use this class. You just need to include the autoload, instantiate the class and call its public method get.
require 'vendor/autoload.php';
$api = new Webservice\Spotify\WebApi();
$results = $api->get('search', 'artist', 'json', array("q" => "Queen"));