What is a scripting language? , why is the PHP language a scripting language?

Q: 1, scripting languages and programming languages and HTML are not the main categories of computer language? Where is the difference? The key is that PHP is a scripting language how to understand? --because I just started to learn PHP language, so please the heroes to speak as easy as possible.
2, I want to do the function of the whole site, with the self-built station system, but is it best to learn some PHP language?

Answer 1: Programming language is generally used to write applications, such as C,c++,vb,dephi,java, powerful, learning difficulty is also large.
Scripting languages are generally used to write simple applications, such as js,vbs,jsp,asp,php, and macro programs can be considered scripting languages. The biggest drawback of scripting languages than programming languages is that they are inefficient to execute, but easier to write.
HTML is not a language, although it is called Hypertext Markup Language, in fact, can only be counted as some control marks, written out is not called the program.
You can also have VBS or JS scripts in a static Web page, which are just the foreground.
ASP can either use VBS or JS, but usually most people with VBS, they are backstage.
PHP and C syntax are almost the same, and JS is almost the same, are very close to
You want to do the website to learn ASP (a bit behind, but the entry is easier) or PHP or JSP or ASP (can learn vb.net can also learn c#.net) at least the same.
Free full station system can be used for free modification, but most do not allow commercial use, you can go to the appropriate official website to view the authorization file.

Answer two: C;c++;p erl;vb; compilation, etc. these belong to the programming language
Scripting language is mainly our common asp;php and so on.
ASP belongs to VB, is a subset of VB
PHP was developed using C.
Both ASP and PHP need server parsing execution, but HTML and they are different, HTML does not need server parsing execution, he only need to directly output on the line, so we call HTML is hypertext.

If you are using the self-Help station system developed by PHP, then if you want to develop a complex web site you'd better learn PHP, so you can rewrite the core of the station system, but if you only use it to do ordinary Enterprise station, PHP you do not learn it is OK.