Install JSON PHP Extension on CentOs or RedHat

JSON (JavaScript Object Notation) is the serialization format that is much lighter than it’s older sibling XML. In addition, JSON is native to JavaScript and it’s object oriented paradigm, hence makes it them perfect partners.

Instead of serializing your code manually, that is writing your own classes and functions, there is a PHP extension that takes on most of the work for you. You just have to install it.

Since I had numerous requests for info and questions relating to JSON extension ...