Introduction

PHP is an open-source scripting language created back in 1994. PHP stands for Hypertext Preprocessor. It is widely used for scripting the backend of a website. PHP is executed on the server-side and is one of the oldest server-side scripting languages for building dynamic web pages.

PHP integrates well with HTML, CSS, and Javascript, and that’s why it is embedded with these front-end technologies. Although much has been changed in the web development domain and Javascript has dominated. However, PHP is still famous for building blog sites in Wordpress and Joomla or Ecommerce sites in Magento.

Here’s a cheat sheet for some fundamental concepts in PHP. These fundamental questions are usually asked in an interview.