Composer installation and setup in PHP - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Composer in PHP?

Composer is a tool for managing PHP project dependencies. It helps you install and update libraries your project needs.

beginner

How do you check if Composer is installed on your system?

Run the command composer --version in your terminal. If Composer is installed, it shows the version number.

beginner

What is the first step to install Composer on Windows?

Download the Composer-Setup.exe from the official Composer website and run it. It guides you through the installation.

intermediate

How do you install Composer globally on Linux or macOS?

Use these commands:<br>php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"<br>php composer-setup.php<br>php -r "unlink('composer-setup.php');"<br>Then move it to a directory in your PATH, e.g., sudo mv composer.phar /usr/local/bin/composer.

beginner

What file does Composer use to manage project dependencies?

Composer uses a composer.json file in your project folder to list the libraries and versions your project needs.

Which command checks the installed Composer version?

A composer install

B php composer.json

C composer --version

D php --version

The command composer --version shows the installed Composer version.

What is the main purpose of Composer in PHP projects?

A Manage project dependencies

B Compile PHP code

C Run PHP scripts

D Create databases

Composer manages libraries and packages your PHP project depends on.

Where is the composer.json file located?

A In the project root folder

B In the PHP installation folder

C In the system's temp folder

D In the web server root

The composer.json file is placed in the root folder of your PHP project.

Which command installs the dependencies listed in composer.json?

A composer remove

B composer install

C php composer.json

D composer update

The composer install command downloads and installs all dependencies.

On Windows, how do you start installing Composer?

A Download composer.json

B Use terminal command <code>php composer.phar</code>

C Install PHP again

D Run Composer-Setup.exe

On Windows, you download and run the Composer-Setup.exe installer.

Explain the steps to install Composer globally on Linux or macOS.

Think about commands to download, run, clean up, and move the Composer file.

Describe the role of the composer.json file in a PHP project.

Consider how Composer knows what packages to install.