In this new post to his site Leonid Mamchenkov talks about validating JSON content sent to your application to ensure it matches a JSON schema definition.

GitHub was rather slow yesterday, which affected the speed of installing composer dependencies (since most of them are hosted on GitHub anyway). Staring at a slowly scrolling list of installed dependencies, I noticed something interesting.

Of course, I’ve heard of the seld/jsonlint before. It’s a port of zaach/jsonlint JavaScript tool to PHP, written by Jordi Boggiano, aka Seldaek, the genius who brought us composer dependency manager and packagist.org repository.

But JSON schema? What’s that?

From there he gets into a high level definition of what JSON schema is and the similarities it has to XML's structure. He then links to a PHP package that can help with the validation and how to use it (defining a simple JSON file, a schema and the code to perform the evaluation).