Custom post type arguments in Wordpress - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to register a custom post type with the label 'Books'.

Wordpress

register_post_type('book', array('label' => [1]));

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

A'Book'

B'books'

C'Books'

D'book'

Attempts:

3 left

💡 Hint

Common Mistakes

Using the post type slug instead of a label.

Not using quotes around the label.

The 'label' argument should be a human-readable name like 'Books' for the custom post type.

2fill in blank

medium

Complete the code to make the custom post type publicly queryable.

Wordpress

register_post_type('movie', array('public' => [1]));

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

A'false'

Bfalse

C'true'

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings 'true' or 'false' instead of booleans.

Setting 'public' to false which hides the post type.

The 'public' argument should be set to the boolean true (without quotes) to make the post type publicly queryable.

3fill in blank

hard

Fix the error in the code to enable the post type to support the editor and thumbnail features.

Wordpress

register_post_type('album', array('supports' => array([1])));

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

A'title', 'editor'

B'editor', 'thumbnail'

D'editor', 'comments'

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a single string instead of an array.

Missing 'thumbnail' if you want featured images.

The 'supports' argument must be an array of strings. Here, it should include 'editor' and 'thumbnail' to enable those features.

4fill in blank

hard

Fill both blanks to register a custom post type that is hierarchical and has a custom menu icon.

Wordpress

register_post_type('product', array('hierarchical' => [1], 'menu_icon' => [2]));

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

Atrue

Bfalse

C'dashicons-cart'

D'dashicons-admin-post'

Attempts:

3 left

💡 Hint

Common Mistakes

Using false for 'hierarchical' when parent-child is needed.

Not using quotes around the dashicon string.

Setting 'hierarchical' to true allows parent-child relationships. The 'menu_icon' uses a dashicon string like 'dashicons-cart'.

5fill in blank

hard

Fill all three blanks to register a custom post type with a custom rewrite slug, showing it in REST API, and enabling archive pages.

Wordpress

register_post_type('event', array('rewrite' => array('slug' => [1]), 'show_in_rest' => [2], 'has_archive' => [3]));

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

A'events'

Btrue

Cfalse

D'event'

Attempts:

3 left

💡 Hint

Common Mistakes

Using false for 'show_in_rest' which disables REST API support.

Not using quotes around the slug string.

Setting 'has_archive' to false when archive pages are needed.

The 'rewrite' slug should be a string like 'events'. 'show_in_rest' and 'has_archive' are booleans set to true to enable REST API and archive pages.

Practice

1. Which argument in register_post_type controls whether the custom post type appears in the WordPress admin menu?

easy

A. public

B. menu_position

C. supports

D. rewrite

Solution

1. Step 1: Understand the role of menu_position

   The menu_position argument sets the location of the custom post type in the WordPress admin menu.

2. Step 2: Compare with other arguments

   public controls visibility on front-end, supports defines features, rewrite controls URL structure.

3. Final Answer:

   menu_position -> Option B

4. Quick Check:

   Admin menu location = menu_position [OK]

Hint: Menu location is set by menu_position argument [OK]

Common Mistakes:

• Confusing public with menu visibility
• Thinking supports controls menu
• Assuming rewrite affects admin menu

2. Which of the following is the correct way to set a custom post type to be publicly queryable in register_post_type arguments?

easy

A. "public_queryable" => true

B. "publiclyqueryable" => true

C. "public_queryable" => "true"

D. "publicly_queryable" => true

Solution

1. Step 1: Recall the exact argument name

   The correct argument is publicly_queryable with an 'ly' and underscore.

2. Step 2: Check value type and spelling

   The value must be boolean true, not string, and spelling must be exact.

3. Final Answer:

   "publicly_queryable" => true -> Option D

4. Quick Check:

   Correct spelling and boolean value = publicly_queryable true [OK]

Hint: Remember 'publicly_queryable' with 'ly' and boolean true [OK]

Common Mistakes:

• Misspelling argument name
• Using string "true" instead of boolean true
• Omitting underscore

3. Given this code snippet, what will be the value of $args['has_archive'] after registration?

$args = [
  'public' => true,
  'has_archive' => false,
  'rewrite' => ['slug' => 'books']
];
register_post_type('book', $args);

medium

A. true

B. null

C. false

D. array with slug 'books'

Solution

1. Step 1: Check the has_archive argument value

   It is explicitly set to false in the array.

2. Step 2: Understand effect of rewrite on has_archive

   The rewrite argument does not override has_archive setting.

3. Final Answer:

   false -> Option C

4. Quick Check:

   Explicit has_archive false remains false [OK]

Hint: Explicit has_archive false stays false despite rewrite [OK]

Common Mistakes:

• Assuming rewrite slug enables archive
• Confusing has_archive with rewrite
• Thinking default true overrides false

4. Identify the error in this register_post_type argument array:

$args = [
  'public' => 'yes',
  'supports' => 'title,editor',
  'menu_icon' => 'dashicons-book'
];
register_post_type('book', $args);

medium

A. 'supports' should be an array, not a comma-separated string

B. 'public' should be boolean true, not string 'yes'

C. 'menu_icon' value is invalid, should be a URL

D. No errors, code is correct

Solution

1. Step 1: Check the supports argument type

   supports must be an array of features, not a string.

2. Step 2: Verify other arguments

   public accepts boolean or string 'true'/'false', 'yes' is invalid but PHP may coerce; menu_icon accepts dashicons slug.

3. Final Answer:

   'supports' should be an array, not a comma-separated string -> Option A

4. Quick Check:

   Supports must be array, not string [OK]

Hint: Supports argument must be an array, not a string [OK]

Common Mistakes:

• Passing supports as string instead of array
• Using invalid string for public
• Thinking menu_icon needs URL

5. You want to create a custom post type 'movie' that is public, supports title and editor, has an archive page at '/films', and appears below Posts in the admin menu. Which $args array is correct?

hard

A. {
'public' => true,
'supports' => ['title', 'editor'],
'has_archive' => true,
'rewrite' => ['slug' => 'films'],
'menu_position' => 5
}

B. {
'public' => true,
'supports' => ['title', 'editor'],
'has_archive' => 'films',
'rewrite' => true,
'menu_position' => 20
}

C. {
'public' => true,
'supports' => 'title,editor',
'has_archive' => true,
'rewrite' => ['slug' => 'movies'],
'menu_position' => 5
}

D. {
'public' => false,
'supports' => ['title', 'editor'],
'has_archive' => true,
'rewrite' => ['slug' => 'films'],
'menu_position' => 5
}

Solution

1. Step 1: Check public visibility and supports

   { 'public' => true, 'supports' => ['title', 'editor'], 'has_archive' => true, 'rewrite' => ['slug' => 'films'], 'menu_position' => 5 } sets public to true and supports as an array with 'title' and 'editor', which is correct.

2. Step 2: Verify archive and rewrite slug

   has_archive is true and rewrite slug is 'films' to get archive at '/films'.

3. Step 3: Confirm menu position

   menu_position 5 places it below Posts in admin menu.

4. Final Answer:

   Option A matches all requirements correctly -> Option A

5. Quick Check:

   Public, supports array, archive slug, menu position 5 = { 'public' => true, 'supports' => ['title', 'editor'], 'has_archive' => true, 'rewrite' => ['slug' => 'films'], 'menu_position' => 5 } [OK]

Hint: Use array for supports, boolean for public, correct slug in rewrite [OK]

Common Mistakes:

• Passing supports as string instead of array
• Setting public false when it should be true
• Incorrect has_archive or rewrite values