PHP has been giving dramatic improvements in recent years. However, as PHP itself does not formulate a standardized use method, together with the bad or even wrong PHP practices conveyed from many outdated PHP tutorials and books, this often makes PHP beginners astray. So PHP: The Right Way was born.

The classic PHP has won a rebirth, so it's time for the modern PHP to throw away its old burden and follow better practices. But almost all the existing PHP books and online tutorials have been out of date for a long time, such that it is difficult to reflect the new features and good practices of modern PHP.

Since Red Hat published its last one (9th) release (Red Hat Linux 9) in 2003, they decided not to provide free technical support & product certification any more, and fully turned to the development of Red Hat Enterprise Linux (RHEL for short). This made some Red Hat rebuilders (open-source Enterprise Editions, such as White Box Enterprise Linux, Tao Linux, X/OS Linux, Scientific Linux) were born at the right moment. The most active one is CentOS (short for Community Enterprise Operating System).

If want to thoroughly understand something, you have to learn its history first. How did it start? How to develop? How to become what it is today? In the end, it may be traced to a certain philosophy that adapts to various backgrounds in that era. Like guys learning art have to study the art history, similarly, in order to searchingly study programming, understand a computer language in-depth, we should go to learn how one language grew out of nothing.

As a ground-breaking and innovative technology on the Microsoft .NET software development platform, LINQ (Language-Integrated Query) set up an efficient bridge between object-oriented programming languages and various data sources, which greatly reduces the complexity of software development.