PHP Installation and Setup - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is PHP and why do we need to install it?

PHP is a server-side scripting language used to create dynamic web pages. We install it to run PHP code on our computer or server.

beginner

Name two popular ways to install PHP on your computer.

You can install PHP by downloading it directly from the official PHP website or by using a software package like XAMPP or WAMP that includes PHP, Apache, and MySQL.

beginner

What is XAMPP and how does it help with PHP setup?

XAMPP is a free software package that installs Apache server, MySQL database, and PHP together. It makes setting up a local web server easy for running PHP scripts.

beginner

After installing PHP, how can you check if it is installed correctly?

Open your command line or terminal and type php -v. If PHP is installed, it will show the version number and some details.

beginner

What file extension do PHP files use and how do you run a PHP file?

PHP files use the .php extension. You run them by placing them in your web server's root folder and accessing them through a browser or by running php filename.php in the terminal.

Which software package includes PHP, Apache, and MySQL for easy setup?

A XAMPP

B Node.js

C Visual Studio Code

D Git

XAMPP bundles PHP, Apache, and MySQL to help you run a local web server easily.

What command checks the installed PHP version in the terminal?

A php --install

B php -v

C php check

D php version

The command php -v shows the PHP version installed on your system.

What file extension should PHP files have?

A .js

B .html

C .txt

D .php

PHP files must have the .php extension to be recognized as PHP scripts.

Why do you need a web server like Apache to run PHP files?

A Because PHP is a browser

B Because PHP is a database

C Because PHP runs on the server to generate web pages

D Because PHP is a text editor

PHP code runs on the server side, so a web server like Apache is needed to process PHP scripts.

Which of these is NOT a way to install PHP?

A Installing Node.js

B Downloading from the official PHP website

C Using XAMPP

D Using WAMP

Node.js is a JavaScript runtime, not related to PHP installation.

Explain the steps to install PHP on your computer using XAMPP.

Think about downloading, installing, starting the server, and running PHP files.

How can you verify that PHP is installed and working on your system?

Use commands and a simple PHP script to confirm installation.

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