1. Go to this page and download the library: Download texlab/r library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
texlab / r example snippets
header("Content-Type: text/plain");
use TexLab\R\Runner;
y(lm(y~x));
R;
echo $r->run($code);