Why superglobals exist in PHP - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to access the value of a GET parameter named 'user'.

PHP

$username = $_[1]['user'];

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

ACOOKIE

BPOST

CSESSION

DGET

Attempts:

3 left

💡 Hint

Common Mistakes

Using $_POST instead of $_GET for URL parameters.

Trying to access $_SESSION without starting a session.

$_GET is a superglobal array in PHP that holds data sent via URL parameters.

2fill in blank

medium

Complete the code to set a session variable named 'loggedIn' to true.

PHP

session_start();
$_[1]['loggedIn'] = true;

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

ASESSION

BPOST

CCOOKIE

DGET

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to call session_start() before accessing $_SESSION.

Using $_POST or $_GET instead of $_SESSION for session data.

$_SESSION is a superglobal used to store session data across pages.

3fill in blank

hard

Fix the error in the code to correctly retrieve a cookie named 'theme'.

PHP

$theme = $_[1]['theme'];

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

ASESSION

BCOOKIE

CPOST

DGET

Attempts:

3 left

💡 Hint

Common Mistakes

Using $_SESSION or $_POST to access cookie data.

Trying to access cookies without checking if they exist.

$_COOKIE is the superglobal array that holds cookie data sent by the browser.

4fill in blank

hard

Fill both blanks to create an array that holds input data from POST and COOKIE.

PHP

$allData = array_merge($_[1], $_[2]);

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AGET

BPOST

CCOOKIE

DSESSION

Attempts:

3 left

💡 Hint

Common Mistakes

Using $_GET instead of $_POST for form data.

Including $_SESSION which is not input data.

$_POST and $_COOKIE are superglobals that hold form data and cookie data respectively. Merging them combines input sources.

5fill in blank

hard

Fill all three blanks to check if a POST parameter 'email' exists and is not empty.

PHP

if (isset($_[1]['email']) && $_[2]['email'] [3] '') {
    echo 'Email received';
}

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

APOST

C!=

DGET

Attempts:

3 left

💡 Hint

Common Mistakes

Using $_GET instead of $_POST for form data.

Using '==' instead of '!=' to check for non-empty value.

Use $_POST to check the 'email' parameter. The operator '!=' checks that the value is not empty.