What we should learn in php. What is important thing. Should be learn?

Question

Sorry for my English grammar

Answer 1

PHP is for „backend“, code which run on a server.
Server-based code can create dynamic web content on the fly, while a web page is written to the browser.
When a web page is called, the server executes the server-based code inside the page before it returns the page to the browser.
By running on the server, the code can perform complex tasks, like accessing databases.