PHP is a free server side scripting language. I started to teach myself PHP in 2010 when I started University as a means to take on some paid work during my studies. I quickly learnt the basics and after a short while was able to build my own code libraries for sites, allowing them to interface with MySQL databases, send mail and manage login systems. PHP has been vital part of developing websites and used a PHP based system in the final year of my BSc to deliver a system to a client, despite it not being taught on the course.