PHP Installation and Setup - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to display "Hello, World!" in PHP.

PHP

<?php
echo [1];
?>

Drag options to blanks, or click blank then click option'

A'Hello World'

BHello, World!

C"Hello, World!"

DHello World

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the string.

Using echo without a semicolon.

The echo statement outputs the string. The string must be in quotes.

2fill in blank

medium

Complete the code to start a PHP script block.

PHP

[1]
echo "Welcome to PHP!";
?>

Drag options to blanks, or click blank then click option'

A<?

B<?php

C<php>

D<script>

Attempts:

3 left

💡 Hint

Common Mistakes

Using short tags like

Using HTML tags like <script> instead of PHP tags.

The correct way to start a PHP script is with <?php.

3fill in blank

hard

Fix the error in the PHP code to correctly declare a variable.

PHP

<?php
[1] = 10;
echo $number;
?>

Drag options to blanks, or click blank then click option'

A$number

Bvar number

Cint number

Dnumber

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the dollar sign before the variable name.

Trying to declare variable types explicitly.

In PHP, variables must start with a dollar sign $.

4fill in blank

hard

Fill both blanks to create an array and print its first element.

PHP

<?php
$fruits = array([1]);
echo $fruits[2];
?>

Drag options to blanks, or click blank then click option'

A"apple", "banana", "cherry"

B[0]

C[1]

D[2]

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong index to access the first element.

Not putting strings inside quotes in the array.

The array is created with three fruits. The first element is at index 0.

5fill in blank

hard

Fill all three blanks to define a function and call it.

PHP

<?php
function [1]() {
    echo [2];
}

[3]();
?>

Drag options to blanks, or click blank then click option'

Agreet

B"Hello from function!"

DsayHello

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatching function name in definition and call.

Forgetting quotes around the string inside echo.

The function is named greet, it prints a message, and then it is called by its name.

Practice

1. What is the primary purpose of installing PHP on your computer?

easy

A. To design website layouts with CSS

B. To create databases for storing data

C. To run PHP scripts and develop web applications

D. To edit images and graphics

Solution

1. Step 1: Understand PHP's role

   PHP is a server-side scripting language used to create dynamic web pages and applications.

2. Step 2: Identify installation purpose

   Installing PHP allows your computer to process and run PHP scripts.

3. Final Answer:

   To run PHP scripts and develop web applications -> Option C

4. Quick Check:

   PHP installation = run PHP scripts [OK]

Hint: PHP installation lets you run PHP code locally [OK]

Common Mistakes:

• Confusing PHP with database software
• Thinking PHP is for styling websites
• Assuming PHP edits images

2. Which of the following is the correct way to start a PHP script in a file?

easy

A. <?php

B. <script>

C. <php>

D. <?>

Solution

1. Step 1: Recall PHP opening tags

   The standard way to start PHP code is with <?php tag.

2. Step 2: Check other options

   <script> is for JavaScript, <php> is invalid, and <?> is incomplete.

3. Final Answer:

   <?php -> Option A

4. Quick Check:

   PHP scripts start with <?php [OK]

Hint: PHP scripts always start with <?php tag [OK]

Common Mistakes:

• Using JavaScript tags instead of PHP tags
• Omitting 'php' after the opening tag
• Using invalid tags like <php>

3. After installing PHP, you create a file named test.php with this content:

<?php
 echo 'Hello, PHP!';
?>

What will be the output when you run this file in a browser?

medium

A. <?php echo 'Hello, PHP!'; ?>

B. No output

C. Syntax Error

D. Hello, PHP!

Solution

1. Step 1: Understand PHP code execution

   PHP code inside <?php ... ?> runs on the server and outputs the echoed string.

2. Step 2: Predict output in browser

   The browser shows the result of echo 'Hello, PHP!'; which is the text Hello, PHP!.

3. Final Answer:

   Hello, PHP! -> Option D

4. Quick Check:

   PHP echo outputs text to browser [OK]

Hint: PHP echo prints text, not code tags [OK]

Common Mistakes:

• Expecting PHP code to show as text
• Confusing PHP tags with HTML tags
• Thinking PHP causes syntax error here

4. You installed PHP but when running php -v in the terminal, you get an error saying 'command not found'. What is the most likely cause?

medium

A. PHP is not installed or not added to system PATH

B. The PHP script has syntax errors

C. The web server is not running

D. The PHP file has wrong file extension

Solution

1. Step 1: Understand the error message

   'command not found' means the terminal cannot find the PHP program to run.

2. Step 2: Identify common causes

   This usually happens if PHP is not installed or its folder is not added to the system PATH environment variable.

3. Final Answer:

   PHP is not installed or not added to system PATH -> Option A

4. Quick Check:

   Command not found = PHP missing or PATH missing [OK]

Hint: Check PHP installation and PATH if command not found [OK]

Common Mistakes:

• Blaming syntax errors for command line issues
• Thinking web server status affects terminal commands
• Confusing file extension with command availability

5. You want to quickly set up a PHP development environment on your Windows PC without manual configuration. Which option is the best choice?

hard

A. Download only the PHP binary and run scripts manually

B. Install XAMPP which bundles Apache, MySQL, and PHP

C. Install a text editor and write PHP code without server

D. Use a web browser to run PHP files directly

Solution

1. Step 1: Understand setup options

   Manual PHP installation requires configuring a web server and database separately.

2. Step 2: Identify easiest setup

   XAMPP bundles Apache web server, MySQL database, and PHP in one package for easy installation and setup.

3. Final Answer:

   Install XAMPP which bundles Apache, MySQL, and PHP -> Option B

4. Quick Check:

   XAMPP = easiest PHP environment setup [OK]

Hint: Use XAMPP for quick PHP setup with server and database [OK]

Common Mistakes:

• Thinking PHP runs without a server
• Ignoring the need for a web server in PHP development
• Trying to run PHP files directly in browser