Programmers Heaven Blog: August 2013

Comments in PHP

A comment in PHP code is a line that is not read/executed as part of the program. Its only purpose is to be read by someone who is editing the code!

Comments are useful for:

To let others understand what you are doing - Comments let other programmers understand what you were doing in each step (if you work in a group)
To remind yourself what you did - Most programmers have experienced coming back to their own work a year or two later and having to re-figure out what they did. Comments can remind you of what you were thinking when you wrote the code

Basic PHP Syntax

A PHP script can be placed anywhere in the document.

A PHP script starts with <?php and ends with ?>:

<?php

// PHP code goes here

?>

The default file extension for PHP files is ".php".

A PHP file normally contains HTML tags, and some PHP scripting code.

First PHP Hello world Programme

Here is a first example of php. To run the script you need to save it like this index.php and save it to your www directory of your web host or you'r local web directory.

Example

<!DOCTYPE html>

<html>

<body>

<?php

echo "My first PHP script!";

?>
</body>

</html

Preview

Hello World!

Introduction to PHP and What is PHP

What You Should Already Know

Before you continue you should have a basic understanding of the following:

HTML

CSS

JavaScript

If you want to study these subjects first, find the tutorials on our Home page.

Programmers Heaven Blog

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Wednesday, August 28, 2013

Comments in PHP

Basic PHP Syntax

First PHP Hello world Programme

Introduction to PHP and What is PHP