In this tutorial I’ll show you how to add a smart cache system to a resource using PHP. This tutorial can be adapted to any scripting language as long as you adapt the functions too, since the logic will remain the same.
The tutorial uses a very basic script:
- A user sends some informations to a server;
- Using this information, a script generate some data;
- The data is then returned to the client encoded in Json format;
So we have 3 functions:
filterInputthat filter incoming parameters from the client request;
fetchDatathat fetch the data using the developer business logic;
outputEscapedJsonthat encode the data to be Json outputted correctly;
For the purpose of this tutorial we will assume that those functions have been tested and they work 🙂 !
PHP default behavior
So the script is really as simple as the code below:
<?php $params = filterInput($_GET); $data = fetchData($params); echo outputEscapedJson($data);
This code will work, but you have to keep in mind that PHP made some assumptions when generating the response: Continue reading