Проблема с API PHP JSON

PHP код:

$version= $_GET['version'];
$key= $_GET['key'];
$client= $_GET['client'];
echo json_encode(array($version));
echo json_encode(array($key));
echo json_encode(array($client));

htaccess код:

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([A-Za-z-]*)/(.*)$ api.php?version=$1&key=$2&client=$3 [L]

Пишу в url site.com/aaa/bbb/ccc Выводит:

["aaa"]["bbb\/ccc"][""]