PHP is an interesting language, and to many it is considered a language that is archaic and badly designed. In fact, I largely agree that PHP’s design is not optimal, but there is no other language in the world that is both easy to learn and deployable on almost any shared hosting service so easily. This is changing, but for now, PHP is here to stay.
By design, PHP does not have explicit typing– a variable can be any type, and can change to any type at any time. This is in stark contrast to other languages, such as Apple’s Swift, Java, and many others. Depending on your background, you may consider PHP’s lack of explicit typing to be dangerous.
Not only this, but PHP is not the most performant language by any means. You can see this for yourself in TechEmpower’s famous framework benchmarks. These results clearly show that PHP is at or near the bottom of the pile, being beat outright by languages such as Java and Go.
So, how do you make one of the most popular languages in the world for web applications usable again? Many say that PHP simply needs to be killed off entirely, but Facebook disagrees.