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PHP Syntax


The PHP script is executed on the server, and the plain HTML result is sent back to the browser.


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.

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

Example

<!DOCTYPE html>
<html>
<body>

<h1>My first PHP page</h1>

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


</body>
</html>

Run example »

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.

With PHP, there are two basic statements to output text in the browser: echo and print.


Comments in PHP

Example

<!DOCTYPE html>
<html>
<body>

<?php
//This is a PHP comment line

/*
This is
a PHP comment
block
*/
?>


</body>
</html>

Run example »



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