First PHP program (Hello World) - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the <?php ... ?> tags in a PHP file?

These tags tell the server to start and stop interpreting the code as PHP. Anything inside runs as PHP code.

beginner

Write the PHP code to print 'Hello World' on the screen.

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

beginner

What does the echo statement do in PHP?

It outputs text or variables to the web page or console.

beginner

Can you run PHP code directly in a browser without a server?

No, PHP code runs on a server. The server processes PHP and sends HTML to the browser.

beginner

What will happen if you forget the semicolon at the end of a PHP statement?

PHP will give a syntax error because semicolons mark the end of statements.

Which tag starts PHP code in a file?

A &lt;script&gt;

B &lt;?php

C &lt;php&gt;

D &lt;?&gt;

The correct tag to start PHP code is <?php.

What does the echo statement do?

A Outputs text to the screen

B Starts a PHP script

C Ends a PHP script

D Declares a variable

Echo outputs text or variables to the screen.

What symbol ends a PHP statement?

A ;

B .

C :

D ,

Semicolon (;) ends a PHP statement.

Can PHP code run directly in a browser without a server?

A Yes, always

B Only in some browsers

C No, it needs a server

D Only on mobile browsers

PHP needs a server to run; browsers only display the output.

What will this code output? <?php echo "Hello World"; ?>

A echo "Hello World";

B Nothing

C Error

D Hello World

The echo statement prints Hello World to the screen.

Explain how to write and run a simple PHP program that prints 'Hello World'.

Think about the tags, output command, and environment needed.

What are common mistakes beginners make when writing their first PHP program?

Consider syntax and environment errors.