Curl

GET

$curl = curl_init();

curl_setopt_array($curl, array(
    CURLOPT_RETURNTRANSFER => 1,
    CURLOPT_URL => 'https://min-api.cryptocompare.com/data/pricehistorical?fsym=ETH&tsyms=BTC,USD,EUR&ts=1452680400',
    CURLOPT_SSL_VERIFYPEER => false //evitar dar erro de ssl
));
$resp = curl_exec($curl);
//var_dump(curl_error($curl)); maneira de debugar erros
curl_close($curl);
?>