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.
Table of Contents (22 chapters)
PHP 7 Programming Cookbook
Credits
Foreword
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Encrypting/decrypting without mcrypt


It is a little-known fact among members of the general PHP community that the mcrypt extension, the core of most PHP-based encryption considered secure, is anything but secure. One of the biggest issues, from a security perspective, is that the mcrypt extension requires advanced knowledge of cryptography to successfully operate, which few programmers have. This leads to gross misuse and ultimately problems such as a 1 in 256 chance of data corruption. Not good odds. Furthermore, developer support for libmcrypt, the core library upon which the mcrypt extension is based, was abandoned in 2007, which means the code base is out-of-date, bug-ridden, and has no mechanism to apply patches. Accordingly, it is extremely important to understand how to perform strong encryption/decryption without using mcrypt!

How to do it...

  1. The solution to the problem posed previously, in case you're wondering, is to use openssl. This extension is well maintained, and has modern...