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Learning PHP 7

Learning PHP 7

By : L Zapata (GBP)
3.4 (10)
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Learning PHP 7

Learning PHP 7

3.4 (10)
By: L Zapata (GBP)

Overview of this book

PHP is a great language for building web applications. It is essentially a server-side scripting language that is also used for general purpose programming. PHP 7 is the latest version with a host of new features, and it provides major backwards-compatibility breaks. This book begins with the fundamentals of PHP programming by covering the basic concepts such as variables, functions, class, and objects. You will set up PHP server on your machine and learn to read and write procedural PHP code. After getting an understanding of OOP as a paradigm, you will execute MySQL queries on your database. Moving on, you will find out how to use MVC to create applications from scratch and add tests. Then, you will build REST APIs and perform behavioral tests on your applications. By the end of the book, you will have the skills required to read and write files, debug, test, and work with MySQL.
Table of Contents (12 chapters)
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11
Index

Web servers

So, it is about time that you learn what those famous web servers are. A web server is no more than a piece of software running on a machine and listening to requests from a specific port. Usually, this port is 80, but it can be any other that is available.

How they work

The following diagram represents the flow of request-response on the server side:

How they work

Request-response flow on the server side

The job of a web server is to route external requests to the correct application so that they can be processed. Once the application returns a response, the web server will send this response to the client. Let's take a close look at all the steps:

  1. The client, which is a browser, sends a request. This can be of any type—GET or POST—and contain anything as long as it is valid.
  2. The server receives the request, which points to a port. If there is a web server listening on this port, the web server will then take control of the situation.
  3. The web server decides which web application...
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Learning PHP 7
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