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PHP Syntax

Basic PHP Syntax

Start

All PHP files are saved by the extension .php. PHP scripts can be added anywhere in the document. A PHP script starts with <?php and ends with ?>.

<?php //PHP code goes here ?>

Print

To print any statement in PHP we use echo command.

Code sample

<!DOCTYPE html>
<html>
<body>

<h1>My first PHP page</h1>

<?php
echo "Hello World!";
?>

</body>
</html>

NOTE: PHP statements ends with semicolon `;`

Declaring Variables

We declare variables in PHP by adding dollar $ sign before them.

<?php
$x = 5;
echo $x;
?>

Comments in PHP

To write a single line comment in PHP we put hashtag # or by putting // before the comment.

<?php
# This is a single line comment
// This is also a single line comment
?>

To write a multiple line comment we start the comment with /* and end with */.

<?php
/* This is a
Multiple line comment. */
?>

We can also comment out some parts of the code line.

Code Sample

<!DOCTYPE html>
<html>
<body>

<?php
// You can also use comments to leave out parts of a code line
$x = 5 /* + 15 */ + 5;
echo $x;
?>

</body>
</html>

You can see more about this on PHP Manual

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