Introduction to PHP

Part II

Adam Majczak

C. Adam Majczak, 2015, All Rights Reserved

Smashwords: Second English Edition

(improved and updated)

E-Edition, License Notes

This e-book is licensed for your personal use only. This e-book may not be re-sold or given away to others. To share this book with another person, please purchase an additional copy for each recipient.

While every precaution has been taken in the preparation of this book, the publisher and the author assume no responsibility for errors or omissions, or any for damages resulting from any use of the information contained herein.

ENGLISH EDITION

CONTENTS:

PART 2:

CHAPTER 5: Array processing

Character strings as 1D arrays

Mixed arrays

Multi-dimensional arrays

Internal pointer and some useful functions

CHAPTER 6: When we need conditional statements and loops

If statement (if-elseif-else) and switch-case statement

The while and do-while loops

The for and foreach loops

The break, continue and goto keywords

Filtering mask with binary operators

CHAPTER 7: PHP functions

Argument passing by value and using default values

Variable argument list

Anonymous functions

Arrays as arguments and return values

Argument passing by reference

Returning an array or modifying values by reference

Locals vs. globals

Variable scope in PHP vs. JavaScript

Math functions

Searching and sorting

Quick binary search

PHP runtime-created functions

Generators

PART 1:

Why IT books should be updated?

CHAPTER 1: Introduction to the e-book edition

What is PHP?

What is a PHP File?

How to install a PHP interpreter?

How to test local configuration?

How to use PHP based on Command Line Interface (CLI)?

How to run PHP on a remote server?

Compileonline.com: PHP Page vs. PHP Web View Page

Text output – codepad.org

Embedding PHP

Comments in PHP and including files

CHAPTER 2: PHP variables and constants

Variable names and values

Case sensitivity

Error messages and warnings

Data types in PHP

Using constants in PHP

Integer data type

Floating-point numbers

Bool type (Boolean values)

Null type variable and type checking in PHP

Dynamic variables

CHAPTER 3: Operators

Arithmetic operators

Assignment operator and combined operators

Comparison operators

Logical operators

Type cast forcing

Conditional statements (preview)

Base converting functions and bitwise operators

Operator precedence

The ternary operator

CHAPTER 4: PHP Arrays at a glance

Numeric indexed arrays, runtime array size change

Associative arrays

How to add new key => value pairs to associative arrays?

How to format output data?

Since 2013 PHP was improved and updated. In this new (improved and updated) edition I am using some new tools available online. Code examples was also checked, updated and improved. This edition includes also new PHP features (for example: generators) to become more complete.

CHAPTER 5: Array processing

Character strings as 1D arrays

Characters and their ASCII codes can be mutually converted in PHP using PHP native functions ord() and