“How can I integrate PHP and R?”
I know I’m not the only one who’s asked this question. After all, with great content management systems like Drupal, it would very cool to be able to drop an R module into some PHP code and instantly have a web app popping out some snazzy looking ggplot graphics. After spending some time Google searching for an easy implementation and finding very little in the PHP + R space, I was able to piece together a method for integrating the two. It uses no JavaScript… no AJAX… just plain old PHP.
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After a month of on-again, off-again coding, I’ve finally completed a web site geared towards calculating the Value at Risk of the average investor’s portfolio. The site is visualvar.com. The big idea was to combine the statistical and visualization tools of R (especially ggplot2) with the web interface of Drupal. While I’m happy with the results, I think this may only be the tip of the iceberg in mashing up these technologies. As a side note, I took a bit of a shortcut and I don’t actually have R running directly on the web server, which means I had to settle for ‘overnight’ calculations rather than ‘On-Demand’. But I still think it is a good proof of concept for combing Drupal with R.
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