Options API for site-wide settings in Wordpress - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ component_behavior

intermediate

What does this code output when retrieving an option?

Consider this WordPress code snippet that retrieves a site-wide setting using the Options API. What will be the output of echo $site_name; if the option 'site_name' was previously saved as 'My Cool Site'?

Wordpress

<?php
$site_name = get_option('site_name', 'Default Site');
echo $site_name;
?>

A My Cool Site

B Default Site

C site_name

D NULL

💡 Hint

Think about what get_option returns when the option exists.

The get_option function returns the saved value for the given option name. Since 'site_name' was saved as 'My Cool Site', that string is returned and echoed.

📝 Syntax

intermediate

Which option correctly updates a site-wide option?

You want to update the option 'homepage_message' to 'Welcome!' using the Options API. Which code snippet correctly performs this update?

A update_option('homepage_message', 'Welcome!');

B save_option('homepage_message', 'Welcome!');

C set_option('homepage_message', 'Welcome!');

D put_option('homepage_message', 'Welcome!');

💡 Hint

Check the official function name for updating options.

The correct function to update or add an option in WordPress is update_option. The other functions do not exist in WordPress.

🔧 Debug

advanced

Why does this code fail to save the option?

This code tries to save a new option but it does not work as expected. What is the reason?

Wordpress

<?php
add_option('footer_text', 'Thank you for visiting!');
add_option('footer_text', 'New footer text');
?>

A add_option must be called inside a function hooked to init

B add_option requires a third parameter for autoload, missing here

C add_option cannot save strings, only arrays

D add_option only adds if the option does not exist; second call fails silently

💡 Hint

Think about what happens if you try to add an option that already exists.

The add_option function only adds a new option if it does not already exist. If the option exists, it does nothing and returns false. So the second call does not update the value.

❓ state_output

advanced

What is the value of $result after this code runs?

Given this code snippet, what will be the value of $result?

Wordpress

<?php
update_option('color_scheme', 'dark');
$result = get_option('color_scheme', 'light');
?>

A NULL

B 'light'

C 'dark'

D false

💡 Hint

Remember what update_option does and what get_option returns.

The update_option sets the option 'color_scheme' to 'dark'. Then get_option retrieves it, so $result is 'dark'.

🧠 Conceptual

expert

Which statement about the Options API is TRUE?

Select the correct statement about the WordPress Options API for site-wide settings.

A Options API can only store numeric values, not strings or arrays.

B Options API stores data in the wp_options table and is best for small pieces of data.

C Options API requires manual database queries to retrieve options.

D Options API automatically encrypts all stored options for security.

💡 Hint

Think about where WordPress stores options and what kind of data it handles.

The Options API stores data in the wp_options table and is designed for small pieces of data like settings. It does not encrypt data automatically, does not require manual queries, and can store strings, arrays, and other serializable data.