Expressions, Operations and Type Conversions
This chapter provides tutorial notes and example codes on PHP expressions and operations. Topics include writing expressions with data literals, variables, and operations; bitwise, arithmetic, comparison, logical, string, and assignment operations; precedence of operations; data type automatic conversions.
What Is an Expression
What Is an Operation
Precedence of Operations
Data Type Automatic Conversion
- PHP supports 6 basic types of operations: bitwise, arithmetic, comparison, logical, string, and assignment operations.
- PHP performs automatic type conversion, if an operand has a data type that does match the operator.
- Write your expressions properly with operand data types match operators to avoid automatic type conversion.
Table of Contents
About This Book
Introduction and Installation of PHP
PHP Script File Syntax
PHP Data Types and Data Literals
Variables, References, and Constants
►Expressions, Operations and Type Conversions
Conditional Statements - "if" and "switch"
Loop Statements - "while", "for", and "do ... while"
Function Declaration, Arguments, and Return Values
Arrays - Ordered Maps
Interface with Operating System
Introduction of Class and Object
Integrating PHP with Apache Web Server
Retrieving Information from HTTP Requests
Creating and Managing Sessions in PHP Scripts
Sending and Receiving Cookies in PHP Scripts
Controlling HTTP Response Header Lines in PHP Scripts
Managing File Upload
MySQL Server Connection and Access Functions
Functions to Manage Directories, Files and Images
SOAP Extension Function and Calling Web Services
SOAP Server Functions and Examples
Localization Overview of Web Applications
Using Non-ASCII Characters in HTML Documents
Using Non-ASCII Characters as PHP Script String Literals
Receiving Non-ASCII Characters from Input Forms
"mbstring" Extension and Non-ASCII Encoding Management
Managing Non-ASCII Character Strings with MySQL Servers
Parsing and Managing HTML Documents
Configuring and Sending Out Emails
Image and Picture Processing
Managing ZIP Archive Files
Managing PHP Engine and Modules on macOS
Managing PHP Engine and Modules on CentOS
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