精通PHP 7：面向对象与模块化Web开发

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"Learn PHP 7 - Object-Oriented Modular Programming using HTML5, CSS3, JavaScript, XML, JSON, and MySQL" 是一本针对初学者的书籍，旨在介绍如何在PHP 7环境中编写稳定、安全、面向对象的代码。本书通过清晰、节奏适中的方式讲解，利用PHP 7的新特性，如增强的密码哈希加密（password_hash）。本书采用实践为主的学习方法，提供完整的编码示例。每章包含“动手做”练习，读者可以对示例代码进行调整。章节末尾的编程练习则鼓励读者根据章节中展示的算法开发自己的应用程序。通过创建一个完整的三层应用程序，读者将体验到自然的构建和测试每个层级的过程。每个层级逻辑上和物理上都使用面向对象和依赖注入技术分离，使得各层可以独立更新，而不会过多影响其他层级。除了通过面向对象编程教授良好编程习惯外，本书还强调创建安全代码。每完成一章，读者都有机会设计并创建一个应用，以巩固所学概念。书中涵盖的知识点包括： 1. PHP 7的基础语言元素：条件语句、循环、数组和方法（函数）。 2. 结合HTML5、CSS3和JavaScript创建Web应用程序。 3. 处理XML、JSON和MySQL数据。 4. 使用安全编码技术。 5. 创建错误日志、用户日志和应用程序日志。 6. 各种备份和恢复技术。 7. 在PHP 7中使用Try/Catch块处理程序异常。本书适合初次接触PHP，特别是PHP 7编程/脚本语言的新手。内容结构包括： 1. 第1章：PHP 7简介。 2. 第2章：接口、平台、容器和三层编程。 3. 第3章：模块化编程。 4. 第4章：安全的用户界面。 5. 第5章：处理和记录异常。 6. 第6章：数据对象。 7. 第7章：身份验证。 8. 第8章：多功能界面。通过阅读本书，读者不仅能够掌握PHP 7的基础，还能了解到如何构建模块化的、安全的Web应用程序，并结合现代前端技术如HTML5、CSS3和JavaScript，以及数据处理技术如XML、JSON和MySQL，实现高效的应用开发。

xviii

■ IntroduCtIon

Chapter 4: Secure User Interfaces

After completing this chapter, the student will be able to:

• Explain why user input must be validated in the interface and business rules tiers

• Explain why user input must be filtered in the business rules tier

• Use HTML5 code to validate user input

• Use JavaScript code to validate user input

• Use PHP if statements (conditional statements) to validate and filter input

• Use foreach loops to dynamically create an HTML select box from an XML file

• Use simple arrays for filtering and validation

• Pass simple arrays into methods (functions)

• Understand how to use dependency injection to control code version changes

Chapter 5: Handling and Logging Exceptions

After completing this chapter, the student will be able to:

• Explain the difference between errors and exceptions

• Create a PHP program that can handle general exceptions

• Create a PHP program that can create, raise, and handle user exceptions

• Explain and use a switch and/or embedded if/else statement

• Create a PHP program that uses the while loop and/or the for loop

• Create a program that reads/updates a text file using a two-dimensional array

• Create a PHP program that logs exceptions and e-mails support personnel

Chapter 6: Data Objects

After completing this chapter, the student will be able to:

• Create a data class that inserts, updates, and deletes XML or JSON data

• Explain how to create a data class that updates MySQL Data using a SQL Script

• Create a PHP program that creates a change backup log

• Create a PHP program that can recover data from a previous backup

• Apply changes to create up-to-date valid information

• Use dependency injection to attach a data class to another class in the BR tier

• Create a three-tier PHP application

Chapter 1

An Introduction to PHP 7

“PHP is a popular general-purpose scripting language that is especially suited to web

development. Fast, flexible, and pragmatic, PHP powers everything from your blog to the

most popular web sites in the world.” —www.php.net

Chapter Objectives/Student Learning Outcomes

After completing this chapter, the student will be able to:

• Understand the differences between LAMP, WAMP, and MAMP

• Successfully install a version of LAMP, WAMP, or MAMP

• Search the Internet for troubleshooting problems

• Explain the difference between a programming language and a scripting language

• Create an error-free simple PHP program

PHP 5.5+, PHP 7+, and PHP.NET

Today, PHP (Hypertext Preprocessor) is one of the most popular languages used for web application

development. The language has evolved to allow the programmer to quickly develop well-formed error-free

programs using both procedural and objected-oriented programming techniques. It provides the ability

to use many preexisting libraries of code that either come with the basic installation or can be installed

within the PHP environment. This gives you multiple ways to complete a particular task. It provides more

flexibility than many other languages. The ease with which additional libraries of code can be added to the

environment is one of the many driving forces in its popularity.

Procedural language—A procedural programming language includes functions/methods

that can be called from the main flow of the program. The flow of the program jumps to

the function/method, executes the code within the module, and then returns to the next

statement in the main flow of the program. Some Procedural languages include a main

function/method that automatically is called when the program is executed.

S. Prettyman, Learn PHP 7, DOI 10.1007/978-1-4842-1730-6_1

Electronic supplementary material The online version of this chapter (doi:10.1007/978-1-4842-1730-6_1)

contains supplementary material, which is available to authorized users.

Chapter 1 ■ an IntroduCtIon to php 7

Object-oriented language—An object-oriented language uses classes and objects. Classes

are similar to blue prints. A class describes what an object can contain, including

properties/variables and functions/methods. An object is an instance of a class (like a

building that has been created from a blueprint). Object-oriented languages provide

polymorphism, encapsulation, and inheritance. Objects are naturally encapsulated by

containing all related functions/methods and properties/variables within the object itself.

Polymorphism allows duplicate method/function names within object-oriented objects.

However, the “signature” must be different. The “signature” is the combination of the

types of variables (numbers and characters) passed into the method/function and the

type of information passed out of a method/function. For example, several

add methods

could be created—one that only accepts integers (whole numbers), one that only accepts

floating point numbers (numbers with decimals), and one that accepts a combination.

The program will determine which method/function to call by what has been passed into

the method/function. Inheritance in object-oriented programming allows an object to

inherit properties/variables and functions/methods from another object. The object can

also override those items inherited. This is similar to a child inheriting characteristics from

the parents. Object-oriented languages can also be event-driven. An event-driven program

will “sleep” until an event occurs. This is similar to an ATM machine program waiting for

a user to input an ATM card.

PHP is an open source language. As such, each version of the language is created using input from the

individuals who use it—the programmers themselves. This allows the language, over time, to evolve and

float into the direction that is driven by the users. From its first release in 1995 as a Personal Home Page Tool

(PHP) by Rasmus Lerdorf, the versions have been released on the Internet with forums to provide users the

ability to make suggestions and even provide code changes and additions. Today www.php.net is the official

PHP web site.

Open source language—An open source programming language is developed by a

community of interested parties. The community accepts input from fellow programmers

for suggested upgrades and corrections. Several members of the community work together

to present proposals and to make changes to the language. Open source languages are

“free”. A non-open source language (such as Microsoft C#) is created and updated by a

company or major organization. Non-open source languages are not usually “free”.

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精通PHP 7：面向对象与模块化Web开发

Learn PHP 7

cpp-learn.tar.gz

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scikit_learn.tar.gz

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Consider defining a bean of type com.itheima.learn.demo01.mapper.UserMapper in your configuration.

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