lib/SteamCondenser/Community/WebApi.php
public static function getJSON($interface, $method, $version = 1, $params = null) {
        return self::load('json', $interface, $method, $version, $params);
    }
public static function getJSON($interface, $method, $version = 1, $params = null) {
        return self::load('json', $interface, $method, $version, $params);
    }
Fetches JSON data from Steam Web API using the specified interface,
method and version. Additional parameters are supplied via HTTP GET.

@param string $interface The Web API interface to call, e.g. ISteamUser
@param string $method The Web API method to call, e.g.
GetPlayerSummaries
@param int $version The API method version to use
@param array $params Additional parameters to supply via HTTP GET
@return string Data is returned as a JSON-encoded string.