PHP Tutorials - Herong's Tutorial Examples - v5.17, by Herong Yang
PHP Statement Delimiter and Comments
This section provides a tutorial example on how to write PHP statements and comment in PHP source code files. PHP uses semicolon ';' as the statement delimiter. Comments can be entered in Perl, Java, or C styles.
PHP uses semicolon ";" as the statement delimiter. PHP statements can be written in the source code file in different ways:
If you want to enter comments into the PHP source code, you can do it in 3 ways:
Here is a tutorial example on how to write PHP statements and comments:
<?php /* StatementSamples.php #- Copyright 2003 (c) HerongYang.com. All Rights Reserved. */ # The next 1 statement is written in 2 code lines. print "I am tossing a coin now. " . "Guess what the result will be?\n"; /* I am using the rand() function to simulate the randomness of tossing a coin. The rand(min,max) function returns a random integer between the specified minimum number and maximum number. -- This is a sample of C style comment */ # The next 1 statement is written in 1 code line. $count = 0; while ($count < 7) { # Next 2 statements are written in 1 code line. $count++; print "Round # $count:\n"; $coin = rand(0,1); if ($coin==1) { print " Head\n"; // Java style comment } else { print " Tail\n"; # Perl style comment } } ?>
There is no surprises in the output:
herong> \php\php StatementSamples.php I am tossing a coin now. Guess what the result will be? Round # 1: Tail Round # 2: Tail Round # 3: Head Round # 4: Tail Round # 5: Tail Round # 6: Head Round # 7: Tail
Table of Contents
Introduction and Installation of PHP
PHP Script Source Code File Format
►PHP Statement Delimiter and Comments
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
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
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
Managing PHP Engine and Modules on macOS