Why hooks enable extensibility in Wordpress - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a function to a WordPress action hook.

Wordpress

add_action('init', [1]);

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

A'init_function'

B'my_custom_function'

C'hook_function'

D'start_function'

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put the function name in quotes.

Using a function name that does not exist.

The add_action function requires the name of the function to call when the hook runs. Here, 'my_custom_function' is the correct function name.

2fill in blank

medium

Complete the code to apply a filter to modify content in WordPress.

Wordpress

add_filter('the_content', [1]);

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

A'modify_content'

B'change_text'

C'content_filter'

D'filter_content'

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function name that does not exist.

Not using quotes around the function name.

The add_filter function needs the name of the function that will modify the content. Here, 'content_filter' is the correct function name.

3fill in blank

hard

Fix the error in the code to correctly remove a filter in WordPress.

Wordpress

remove_filter('the_title', [1]);

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

A'modify_title'

BmodifyTitle

C'modifyTitle'

Dmodify_title

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the function name without quotes.

Using a different function name than was added.

The function name must be a string when removing a filter. So, 'modify_title' with quotes is correct.

4fill in blank

hard

Fill both blanks to add a filter with priority and accepted arguments.

Wordpress

add_filter('the_excerpt', [1], [2]);

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

A'custom_excerpt'

B10

C2

D'excerpt_filter'

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the order of priority and function name.

Not using quotes for the function name.

The second argument is the function name as a string, and the third argument is the priority number. Here, 'custom_excerpt' and 10 are correct.

5fill in blank

hard

Fill all three blanks to add an action hook with function, priority, and accepted arguments.

Wordpress

add_action('wp_footer', [1], [2], [3]);

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

A'footer_message'

B1

C0

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong priority number.

Not quoting the function name.

Setting accepted arguments incorrectly.

The function name is 'footer_message', priority is 5, and accepted arguments is 0 because the function takes no arguments.