[PHP TUT. PART 1] Basic PHP Syntax

by cybercodes Wed Jul 04, 2012 4:53 am

A PHP script always starts with <?php and ends with ?>. A PHP script can be placed anywhere in the document.

On servers with shorthand-support, you can start a PHP script with <? and end with ?>.

For maximum compatibility, we recommend that you use the standard form (<?php) rather than the shorthand form.

Code:: <?php ?>

A PHP file must have a .php extension.

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

Below, we have an example of a simple PHP script that sends the text "Hello World" back to the browser:

Code:: <html> <body> <?php echo "Hello World"; ?> </body> </html>

Each code line in PHP must end with a semicolon. The semicolon is a separator and is used to distinguish one set of instructions from another.

There are two basic statements to output text with PHP: echo and print.

In the example above we have used the echo statement to output the text "Hello World".

Comments in PHP
In PHP, we use // to make a one-line comment or /* and */ to make a comment block:

Code:: <html> <body> <?php //This is a comment /* This is a comment block */ ?> </body> </html>

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