Query parameters in Wordpress - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the value of a query parameter named 'page'.

Wordpress

$page = $_GET[[1]];

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

A'user'

B'post'

C'page'

D'id'

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to use quotes around the parameter name.

Using $_POST instead of $_GET for query parameters.

In WordPress and PHP, query parameters are accessed via the $_GET superglobal array. To get the 'page' parameter, use $_GET['page'].

2fill in blank

medium

Complete the code to check if the 'category' query parameter exists.

Wordpress

if (isset($_GET[[1]])) {
    // do something
}

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

A'date'

B'category'

C'author'

D'tag'

Attempts:

3 left

💡 Hint

Common Mistakes

Checking $_POST instead of $_GET.

Using the wrong parameter name.

The isset() function checks if a variable is set and not null. To check if the 'category' query parameter exists, use isset($_GET['category']).

3fill in blank

hard

Fix the error in the code to safely get the 'author' query parameter or set it to 'guest' if missing.

Wordpress

$author = $_GET[[1]] ?? 'guest';

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

A'user'

B'admin'

C'name'

D'author'

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong parameter name.

Not using quotes around the parameter name.

The null coalescing operator ?? returns the left value if it exists and is not null; otherwise, it returns the right value. To get 'author' or default to 'guest', use $_GET['author'] ?? 'guest'.

4fill in blank

hard

Fill both blanks to create a query that gets posts filtered by 'tag' and ordered by 'date'.

Wordpress

$args = array(
    'tag' => $_GET[[1]],
    'orderby' => [2]
);

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

A'tag'

B'category'

C'date'

D'title'

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up 'tag' and 'category' keys.

Using a variable instead of a string for 'orderby'.

To filter posts by the 'tag' query parameter, use 'tag' => $_GET['tag']. To order posts by date, set 'orderby' => 'date'.

5fill in blank

hard

Fill all three blanks to build a WP_Query args array filtering by 'author', limiting posts to 5, and ordering by 'title'.

Wordpress

$args = array(
    'author_name' => $_GET[[1]],
    'posts_per_page' => [2],
    'orderby' => [3]
);

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

A'author'

B5

C'title'

D'category'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'author' without quotes in the first blank.

Using a string instead of a number for posts_per_page.

Using a variable instead of a string for orderby.

To filter by author from query parameters, use $_GET['author']. Limit posts to 5 with 'posts_per_page' => 5. Order by title with 'orderby' => 'title'.