Learn about PHP Superglobals with easy-to-understand examples and a fun quiz. Perfect for beginners!

illustration By © Kartick Dutta

PHP Superglobals

Superglobals are special variables in PHP:

• They are always available in all parts of your code.
• You don't need to declare them; they are already there.

How to Use PHP Superglobals?

• Use them to get data: Like from forms or URLs.
• Example: $_GET['name'] can get a name from a URL.

When to Use PHP Superglobals?

• When you need to collect data: Like from a form on a website.
• When you want to send data: Between pages or from a URL.

Key Superglobals:

• $_GET: To get data from the URL.
• $_POST: To get data from a form.
• $_SERVER: To get information about the server.
• $_SESSION: To store data across different pages.
• $_COOKIE: To store data in the user's browser.

Quiz: Test Your Knowledge!

• 1. Which Superglobal is used to get data from a URL?
  $_POST
  $_GET
  $_SESSION
  $_COOKIE
  

  Correct! The $_GET superglobal is used to collect data sent in the URL.

  Explanation: The $_GET superglobal is used to collect data after submitting an HTML form with method="get". It can also collect data sent in the URL.
• 2. How do you store data across different pages using PHP?
  $_COOKIE
  $_SESSION
  $_POST
  $_GET
  

  Correct! The $_SESSION superglobal is used to store data across different pages.

  Explanation: The $_SESSION superglobal is used to store data across different pages. This data is stored on the server and is unique to each user.
• 3. Which Superglobal is used to get server information?
  $_SERVER
  $_COOKIE
  $_SESSION
  $_POST
  

  Correct! The $_SERVER superglobal contains information about headers, paths, and script locations.

  Explanation: The $_SERVER superglobal contains information about headers, paths, and script locations. It provides details such as server software and request headers.
• 4. Which Superglobal is used to store data in the user's browser?
  $_SESSION
  $_COOKIE
  $_GET
  $_POST
  

  Correct! The $_COOKIE superglobal is used to store data in the user's browser.

  Explanation: The $_COOKIE superglobal is used to store data in the user's browser. This data persists between page requests and sessions.
• 5. Which Superglobal is used to handle form submissions via POST method?
  $_SESSION
  $_POST
  $_GET
  $_COOKIE
  

  Correct! The $_POST superglobal is used to collect form data after submitting an HTML form with method="post".

  Explanation: The $_POST superglobal is used to collect form data after submitting an HTML form with method="post". It is often used for form submissions requiring data to be sent securely.

Score: 0/5

This article and quiz is written by Kartick Dutta. © 2024

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