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In past 1 year or so, I had opportunities of using a lot of php frameworks including zend, symfony, cakephp, codeigniter. All frameworks have their pros and cons, however that is out of scope of this blog post. You may want to checkout this comparison list of php frameworks here. PHP is a very simple language. You can write a Hello World! code or calculate similarity between two strings (see similar_text()), both with a single line of code. And hence there are a lot of fundamental concepts of PHP, which not only beginners but even some advanced coders can ignore. One such concept is Output Control in PHP. The Output Control functions allow you to control when the output of your PHP script will be thrown to the browsers (console). i.e. You can pre-process the final html output (append, prepend, chip-chop, inserting ad-codes, url linking, keyword highlighting, template caching), which will otherwise be thrown on the browser. Interesting, isn’t it? Can you feel the power of Output Control functions? In this blog post I will build a custom PHP framework (MVC Architecture). Then go on to discuss in brief about the output control functions and finally show how to build a custom template caching engine using these functions for our framework.