PHP is a general-purpose language dedicated to the development of web pages that host dynamic content, usually associated with databases that the web accesses to collect information.
Since its appearance, PHP has been one of the most powerful and stable scripting languages for generating web pages on Linux servers and even Windows. PHP integrates seamlessly with MySQL databases and Apache servers. The syntax of PHP is very similar to that of structured programming languages like C, so if you are used to these, you will not have a hard time adapting to PHP.
In addition, PHP is a very well documented language that has infinite resources, and is compatible with all kinds of standards, such as MySQL, PostgreSQL, Microsoft SQL Server databases.