The stack is a linear data structure that follows the Last-In, First-Out (LIFO) principle. This means that there is only one end for the stack, which is used to add items and remove items from the structure. The addition of new items in the stack is known as push, and push whilst removing an item is known as pop. Since we only have one end to operate, we are always going to push an item at that end, and when we pop, the last item from that end will be popped up. The top most elements in the stack that are also at the very beginning of the stack end are known as the top. If we consider the following image, we can see that after each pop and push operation, the top changes. Also, we are performing the operation at the top of the stack, not at the beginning or middle of the stack. We have to be careful about popping an element when the stack is empty, as well...
PHP 7 Data Structures and Algorithms
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PHP 7 Data Structures and Algorithms
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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)
Preface
Free Chapter
Introduction to Data Structures and Algorithms
Understanding PHP Arrays
Using Linked Lists
Constructing Stacks and Queues
Applying Recursive Algorithms - Recursion
Understanding and Implementing Trees
Using Sorting Algorithms
Exploring Search Options
Putting Graphs into Action
Understanding and Using Heaps
Solving Problems with Advanced Techniques
PHP Built-In Support for Data Structures and Algorithms
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