How do I set up a sport betting site?

I would strongly suggest that you don't.

The reason is simple: your site will have to deal with real money, real credit cards, and real legislation - and unless you understand exactly how to handle all of those - including all the security systems you are going to have to apply vigorously and effectively - you personally will be responsible for all monies stolen or fraudulently handled (including stolen credit cards used on your site, money laundering, data protection, as well as outright theft and breaches into your system): you could very easily find yourself in jail for a very long time just because you don't know enough to implement security properly for example. Gambling sites are prime targets for organised crime; both for stealing from you / your clients and laundering money through you.

And that you have to ask a really basic question like this shows that you are nowhere near experienced enough to risk going anywhere near such a project. If you really want to proceed then you really need to employ experts - security, development, and legal - before you even start to think about producing a site.

If you don't, you stand a very good and real chance of spending the rest of your life in jail - or dead if you piss off the wrong people.

As always Griff's advice is right, but if you want to learn about setting up a PHP website take a look at best-resources-to-learn-php[^]

And this online tool: dbDiffo[^], it can generate the database and application for you.

Quote:

How do I set up a sport betting site?

Short answer: Bad idea.
You don't learn web development with a site involving real money unless it is a toy.
Never expect a beginner to make a secure site for money things.
Links in Solution 1 lead to a good web tutorial site W3Schools Online Web Tutorials[^]

Quote:

1) what programming language needed for this
2) what page name did i need to code and in what language can i code the page
3) what database name with table and give examples needed for this
4) how to apply json api into php code?

Those question let me think that you are not only a beginner on web development, but you are also a beginner in programming too.
Programming is not just learning a language, you need to master a lot of techniques.
Advices:
- Read documentation / Follow tutorials (a lot of them)
- Start with tiny/useless projects, the purpose is to learn programming, not doing something useful.
- Learn debugger (an incredible learning tool)
Debugger - Wikipedia, the free encyclopedia[^]
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
- A problem ? Google is your friend.
- Learn one or more analyze methods, E.W. Djikstra/N. Wirth Stepwize Refinement/top-Down method is a good start.
Structured Programming.pdf[^]
https://en.wikipedia.org/wiki/Top-down_and_bottom-up_design[^]
https://en.wikipedia.org/wiki/Structured_programming[^]
https://en.wikipedia.org/wiki/Edsger_W._Dijkstra[^]
https://www.cs.utexas.edu/users/EWD/ewd03xx/EWD316.PDF[^]
Program Development by Stepwise Refinement[^]
- Learn Algorithms and Data-Structures.
GitHub - The-Art-of-Computer-Programming-Books: "Everyday life is like programming, I guess. If you love something you can put beauty into it." ? Donald E. Knuth[^]
Skiena The Algorithm Design Manual
- Learn Boole algebra
- Learn SQL
- Learn Databases design and Administration
Introduction to database design[^]
1NF, 2NF, 3NF and BCNF in Database Normalization | DBMS Tutorial | Studytonight[^]
- Learn Regular Expressions

Interesting link:
stanford.edu: Learn to Program[^]
CodersLegacy - Imparting knowledge to the Future[^]

There is no shortcut to knowledge, no one can learn for you, you are the only one that can do it.
Remember the exercises and little projects are not here to make something useful, they are here to teach you programming.

My most important part is probably: Learn one or more analyze methods.