Event-driven programming is a very popular concept that encourages writing reactive code that triggers on changes made through input or other events.
Working with logs is a very significant part of software development. Logging means writing messages to a file (or console) describing what is happening in the application. It allows monitoring of complex systems and step by step description of its behavior.
One of the popular methods for creating websites, web applications and even web multiplayer games today are REST APIs. This technique allows for decoupling of a client application from the server.
Laravel is the most popular PHP framework for building web applications. It provides simple solutions for common problems, like secure database querying, routing, console commands, ORM or input validation. It is a very solid choice if you wish to follow test-driven development process.
PHP is not known to be a demon of speed and it can sometimes happen that programmers do not account for how successful a web application can quickly become.