"do ... while" Statements
This section describes how 'do ... while' statements works in PHP. One or more statements are repeatedly executed as long as the specified condition is true.
PHP also supports a variation of the "while" statement called "do ... while" statement.
with 2 forms:
1. Single-statement "do ... while":
do statement while (condition);
2. Multi-statement "do ... while":
} while (condition);
All forms of "do ... while" statements are executed like this:
Step 1: Execute the statement or statements enclosed in the loop.
Step 2: Evaluate "condition" as a Boolean value.
Step 3: If "condition" returns TRUE, continue with Step 1.
Step 4: If "condition" returns "FALSE", terminate the loop.
Of course, you can use the "break" statement inside the loop to terminate the loop immediately.
I will leave it to you to write some sample scripts for "do ... while" statements as exercises.
Table of Contents
About This Book
Introduction and Installation of PHP 7.3
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"
"while" Statement Examples
"for" Statement Examples
►"do ... while" Statements
"break" and "continue" Statements
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
Full Version in PDF/EPUB