Iterating PHP Iterators
Iterating PHP Iterators
About the Book
Looping over collections is something all programmers do. We keep writing the same code and building the same loops in project after project. PHP has us covered though. We don't have to continue to re-invent the loop, we can use the tools provided.
The Standard PHP Library (SPL) gives you the tools you need
An important part of the SPL is the collection of Iterator classes and interfaces. These bits of magic, like the rest of the SPL, will change the way you program. They are power tools in every PHP programmer's toolbox. Like other power tools, if used safely, they can make a difference in how you code, and how fast.
Iterators help you create better programs, "Iterating PHP Iterators" will help you create iterators
"Iterating PHP Iterators" will show you the basic of PHP's Iterators. You will see how to implement them in your own code, as well as use them to do eveyrthing form filtering input to stupid party tricks.
This is a great book for beginners and intermediate developers. It’s a comprehensive introduction to iterators and some of the implementations that ship with the SPL.
- Christopher Pitt (Iterating PHP Iterators Review)
Easy start for beginners, but enough meat for those who already use Iterators
- Mark (@Mark_Baker) Baker
#IteratingPHPIterators by @CalEvans is a great quick reference book if you use them regularly, or a good starter if you haven’t
- Ian (@icawebdesign) H.
Finished @CalEvans 'Iterating PHP Iterators'. Nice read. Should use them more often, especially to filter when looping.#php
- Stefan (@stefan_doorn) Doorn
"Iterating PHP Iterators" is part of the "Learn One Thing Books" series.
About the Author
Bundles that include this book
Table of Contents
- Dedication
-
Chapter 1 – The What and Why of Iterators
- What Are Iterators
- Iterators vs. Iterable Interface
- Why Use Iterators
- Why Not Just Use Arrays
- Two Kinds Of Iterators
- Source Code
- Summary
-
Chapter 2 - The Iterator Interface
- Why Not Just Use The Built-in Iterators
- Building Your Own Iterator
- The Countable Interface
- Summary
-
Chapter 3 - How Iterators Work
-
How An
IteratorOperates - Summary
-
How An
-
Chapter 4 - Outer Iterators
- Pre-made Outer Iterators
-
Creating An
OuterIterator - Summary
-
Chapter 5 - The ArrayIterator
-
ArrayObject -
ArrayIterator - Why Use An Iterator For An Array?
- Offsets
- Flags
- Summary
-
-
Chapter 6 - …Of Inputs And Outputs
- Modifying Output
- Restricting Inputs
- Summary
-
Chapter 7 - The SeekableIterator Interface
- Summary
- Bonus
-
Chapter 8 – Recursing The Iterator
- New Methods
-
RecursiveIteratorIterator - The Most Common Use Case
- Summary
-
Chapter 9 - Iterating The File System
-
DirectoryIterator -
FileSystemIterator -
RecursiveDirectoryIterator - Summary
-
-
Chapter 10 - The Caching Iterator
-
CachingIteratorAnd “Look Ahead” - Flags
- Summary
-
-
Chapter 11 - Generators
- What Are Generators?
- A More Complete Example
- Summary
-
Appendix A - A Bit Math Primer
- Starting Small
- Bigger And Better
- Summary
- NomadPHP
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