Summary - PHP basics

Combine tags, echo and comments to write your first PHP page.

Summary - PHP basics

In this group you learned the building blocks of PHP: tags (<?php ?>), output with echo, comments (//, #, /* */) and version info with phpinfo() / PHP_VERSION.

A PHP file starts with <?php. You print text with echo; every statement ends with ;. Comments explain your code and are ignored by PHP.

You can check the server configuration with phpinfo() and the version number with the PHP_VERSION constant.

Exercise Write a comment and print a greeting

Write a PHP block. Add a single-line // comment. Then use echo to print "Hello PHP"; add \n at the end of the line.

Show example solution

Write a // comment, then add echo "Hello PHP\n";.
Example solution:
<?php
// greeting
echo "Hello PHP\n";

Exercise phpinfo comment and version output

Write a PHP block. Include the word phpinfo() in a // comment. Then use echo to print "PHP 8.3"; add \n at the end of the line.

Show example solution

Write phpinfo in a // comment, then add echo "PHP 8.3\n";.
Example solution:
<?php
// phpinfo() gives info
echo "PHP 8.3\n";

Test yourself

Between which tags is PHP code written?
- <html></html>
- <?php ?>
- <js></js>
- <code></code>
Show answer

<?php ?> — Correct! PHP code is written between <?php ?> tags.

Complete the version comment

<?php
____
echo "PHP 8.3";
?>

Show answer

<?php
// version info
echo "PHP 8.3";
?>

Next lesson: Declaring variables

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