<?php

function getCoverOf($track_name)
    {
        $api_endpoint = 'https://api.deezer.com/2.0/search';
        $search_parameters = array(
            'q' => $track_name,
            'output' => 'json',
            'nb_items' => 1
        );
        $search_uri = $api_endpoint
                      .'?'
                      .http_build_query($search_parameters);

        $track = json_decode(file_get_contents($search_uri));

        return empty($track->data)
            ?: $track->data[0]->album->cover;
    }