Book Image

PHP 7 Programming Cookbook

By : Doug Bierer
Book Image

PHP 7 Programming Cookbook

By: Doug Bierer

Overview of this book

PHP 7 comes with a myriad of new features and great tools to optimize your code and make your code perform faster than in previous versions. Most importantly, it allows you to maintain high traffic on your websites with low-cost hardware and servers through a multithreading web server. This book demonstrates intermediate to advanced PHP techniques with a focus on PHP 7. Each recipe is designed to solve practical, real-world problems faced by PHP developers like yourself every day. We also cover new ways of writing PHP code made possible only in version 7. In addition, we discuss backward-compatibility breaks and give you plenty of guidance on when and where PHP 5 code needs to be changed to produce the correct results when running under PHP 7. This book also incorporates the latest PHP 7.x features. By the end of the book, you will be equipped with the tools and skills required to deliver efficient applications for your websites and enterprises.

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PHP 7 Programming Cookbook
Doug Bierer
Aug, 2016 | 610 pages
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Table of Contents (22 chapters)
PHP 7 Programming Cookbook
PHP 7 Programming Cookbook
Credits
Credits
Foreword
Foreword
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Building a Foundation
Building a Foundation
Introduction
PHP 7 installation considerations
Using the built-in PHP web server
Defining a test MySQL database
Installing PHPUnit
Implementing class autoloading
Hoovering a website
Building a deep web scanner
Creating a PHP 5 to PHP 7 code converter
2
Using PHP 7 High Performance Features
Using PHP 7 High Performance Features
Introduction
Understanding the abstract syntax tree
Understanding differences in parsing
Understanding differences in foreach() handling
Improving performance using PHP 7 enhancements
Iterating through a massive file
Uploading a spreadsheet into a database
Recursive directory iterator
3
Working with PHP Functional Programming
Working with PHP Functional Programming
Introduction
Developing functions
Hinting at data types
Using return value data typing
Using iterators
Writing your own iterator using generators
4
Working with PHP Object-Oriented Programming
Working with PHP Object-Oriented Programming
Introduction
Developing classes
Extending classes
Using static properties and methods
Using namespaces
Defining visibility
Using interfaces
Using traits
Implementing anonymous classes
5
Interacting with a Database
Interacting with a Database
Introduction
Using PDO to connect to a database
Building an OOP SQL query builder
Handling pagination
Defining entities to match database tables
Tying entity classes to RDBMS queries
Embedding secondary lookups into query results
Implementing jQuery DataTables PHP lookups
6
Building Scalable Websites
Building Scalable Websites
Introduction
Creating a generic form element generator
Creating an HTML radio element generator
Creating an HTML select element generator
Implementing a form factory
Chaining $_POST filters
Chaining $_POST validators
Tying validation to a form
7
Accessing Web Services
Accessing Web Services
Introduction
Converting between PHP and XML
Creating a simple REST client
Creating a simple REST server
Creating a simple SOAP client
Creating a simple SOAP server
8
Working with Date/Time and International Aspects
Working with Date/Time and International Aspects
Introduction
Using emoticons or emoji in a view script
Converting complex characters
Getting the locale from browser data
Formatting numbers by locale
Handling currency by locale
Formatting date/time by locale
Creating an HTML international calendar generator
Building a recurring events generator
Handling translation without gettext
9
Developing Middleware
Developing Middleware
Introduction
Authenticating with middleware
Using middleware to implement access control
Improving performance using the cache
Implementing routing
Making inter-framework system calls
Using middleware to cross languages
10
Looking at Advanced Algorithms
Looking at Advanced Algorithms
Introduction
Using getters and setters
Implementing a linked list
Building a bubble sort
Implementing a stack
Building a binary search class
Implementing a search engine
Displaying a multi-dimensional array and accumulating totals
11
Implementing Software Design Patterns
Implementing Software Design Patterns
Introduction
Creating an array to object hydrator
Building an object to array hydrator
Implementing a strategy pattern
Defining a mapper
Implementing object-relational mapping
Implementing the Pub/Sub design pattern
12
Improving Web Security
Improving Web Security
Introduction
Filtering $_POST data
Validating $_POST data
Safeguarding the PHP session
Securing forms with a token
Building a secure password generator
Safeguarding forms with a CAPTCHA
Encrypting/decrypting without mcrypt
13
Best Practices, Testing, and Debugging
Best Practices, Testing, and Debugging
Introduction
Using Traits and Interfaces
Universal exception handler
Universal error handler
Writing a simple test
Writing a test suite
Generating fake test data
Customizing sessions using session_start parameters
Defining PSR-7 Classes
Defining PSR-7 Classes
Introduction
Implementing PSR-7 value object classes
Developing a PSR-7 Request class
Defining a PSR-7 Response class
Index
Index

Understanding differences in parsing

In PHP 5, expressions on the right side of an assignment operation were parsed right-to-left. In PHP 7, parsing is consistently left-to-right.

How to do it...

  1. A variable-variable is a way of indirectly referencing a value. In the following example, first $$foo is interpreted as ${$bar}. The final return value is thus the value of $bar instead of the direct value of $foo (which would be bar):

    $foo = 'bar';
$bar = 'baz';
echo $$foo; // returns  'baz';

  2. In the next example we have a variable-variable $$foo, which references a multi-dimensional array with a bar key and a baz sub-key:

    $foo = 'bar';
$bar = ['bar' => ['baz' => 'bat']];
// returns 'bat'
echo $$foo['bar']['baz'];

  3. In PHP 5, parsing occurs right-to-left, which means the PHP engine would be looking for an $foo array, with a bar key and a baz. sub-key The return value of the element would then be interpreted to obtain the final value ${$foo['bar']['baz']}.

  4. In PHP 7, however, parsing is consistently...

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