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)

Using SplStack class from SPL

If we are not interested in implementing our own version of a stack, we can use the existing SPL implementation for stacks. It is very easy to use and requires minimal code to write. As we already know, SplStack uses SplDoublyLinkedList. It has all possible operations to push, pop, move forward, backward, shift, unshift, and so on. In order to implement the same example we saw previously, we have to write the following lines:

$books = new SplStack(); 
$books->push("Introduction to PHP7");
$books->push("Mastering JavaScript");
$books->push("MySQL Workbench tutorial");
echo $books->pop() . "\n";
echo $books->top() . "\n";

Yes, it is this simple to build a stack using the SplStack class. It is up to us to decide whether we want to implement it using a PHP array, a linked list, or a built...