Custom meta boxes in Wordpress - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a custom meta box in WordPress?

A custom meta box is a section added to the WordPress post editor screen where you can add extra fields or controls to collect additional information about a post.

beginner

Which WordPress hook is used to add custom meta boxes?

The add_meta_boxes hook is used to register and add custom meta boxes to the post editor screen.

intermediate

What function is used to create the content inside a custom meta box?

You create a callback function that outputs the HTML for the meta box content. This function is passed as a parameter to add_meta_box().

intermediate

How do you save data entered in a custom meta box?

You hook into save_post action and use update_post_meta() to save the meta box data securely when the post is saved.

intermediate

Why should you use wp_nonce_field() in custom meta boxes?

Using wp_nonce_field() adds a security token to your meta box form to protect against unauthorized form submissions (CSRF attacks).

Which function registers a custom meta box in WordPress?

A create_meta_box()

B register_meta_box()

C new_meta_box()

D add_meta_box()

add_meta_box() is the correct function to register a custom meta box.

Where do custom meta boxes appear in WordPress?

A On the WordPress dashboard

B On the post editor screen

C In the theme customizer

D On the plugins page

Custom meta boxes appear on the post editor screen to add extra fields.

Which hook should you use to save meta box data?

A wp_head

B init

C save_post

D admin_menu

The save_post hook runs when a post is saved, perfect for saving meta box data.

What is the purpose of wp_nonce_field() in meta boxes?

A To add a security token to the form

B To style the meta box

C To load JavaScript files

D To create a new post

wp_nonce_field() adds a security token to protect against unauthorized submissions.

Which parameter of add_meta_box() defines the callback function for the meta box content?

A The third parameter

B The first parameter

C The last parameter

D The second parameter

The third parameter of add_meta_box() is the callback function that outputs the meta box HTML.

Explain how to add a custom meta box to a WordPress post editor screen and save its data.

Think about the steps from showing the box to saving the input.

Why is it important to use nonces when working with custom meta boxes in WordPress?

Consider what could happen if anyone could submit the form.