<form oninput="result.value=text.value">
<p><input type="text" name="text" autofocus></p>
<p><output name="result"></output></p>
</form><?php
$get = file_get_contents ("https://api.cryptonator.com/api/ticker/btc-ltc");
$ticker = json_decode($get,true);
$priceBTCLTC = $ticker['price'];
?>
PRICE: <?=$priceBTCLTC;?>