Twitch CustomAPI - Urban Dict

<?php
// Set names to lowercase for URL injection.
$TermLower = strtolower($_GET["Term"]);
$UserLower = strtolower($_GET["User"]);
// Inject lowercase names to get correct capitalization of usernames.
$ch = curl_init("https://api.urbandictionary.com/v0/define?term=" . $TermLower);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($ch);
curl_close($ch);
// Decode the above JSON data.
$payload = json_decode($result, true);
// No Term was entered after the command.
if (empty($_GET["Term"]))
{
        echo 'Error: ' . htmlspecialchars($_GET["Term"]) . ' is needed to be specify!';
        die();
}

// Print the output.
echo '(' . htmlspecialchars($_GET["User"]) . ') Definition of ' . $TermLower . ': ' . $payload->definition;
?>

Example: urbandict.php?Term=csgo&User=TwitchUsername