Book Image

PHP 7 Data Structures and Algorithms

By : Mizanur Rahman
5 (1)
Book Image

PHP 7 Data Structures and Algorithms

5 (1)
By: Mizanur Rahman

Overview of this book

PHP has always been the the go-to language for web based application development, but there are materials and resources you can refer to to see how it works. Data structures and algorithms help you to code and execute them effectively, cutting down on processing time significantly. If you want to explore data structures and algorithms in a practical way with real-life projects, then this book is for you. The book begins by introducing you to data structures and algorithms and how to solve a problem from beginning to end using them. Once you are well aware of the basics, it covers the core aspects like arrays, listed lists, stacks and queues. It will take you through several methods of finding efficient algorithms and show you which ones you should implement in each scenario. In addition to this, you will explore the possibilities of functional data structures using PHP and go through advanced algorithms and graphs as well as dynamic programming. By the end, you will be confident enough to tackle both basic and advanced data structures, understand how they work, and know when to use them in your day-to-day work
Table of Contents (14 chapters)

Hashing

Hashing is one of the most important aspects of modern-day programming. In terms of data security and privacy, hashing plays a key role in computer cryptography. We do not feel comfortable to keep our data unsafe and open for all. PHP has several built-in hashing functions. Let's quickly go through them:

  • md5: This calculates the md5 hash of a given string. It will generate 32 characters unique hash for each of the provided string. Hashing is one way, which means, there is no function to decrypt the hashed string to actual string.
  • sha1: This function calculates the sha1 hash of a given string. The generated hash is 40 characters in length. Like md5, sha1 is also a one way hashing. If we set the second parameter to be true, then the function will produce 20-character raw output hash string. One thing to remember is sha1, sha256, and md5 are not secure enough to use...