Retrieving user data in WordPress using get_userdata

The get_userdata function in WordPress retrieves user data based on a user’s ID or username. This function can be useful for retrieving specific user information such as their display name, email, and other profile data.

It can also be used to check if a user exists and retrieve their user meta data. This function is commonly used in WordPress plugins and themes to customize user-specific functionality or display user information on the front-end.

Parameters Accepted by get_userdata Function

  • $user_id (integer, required): Represents the user ID

Return Value of get_userdata Function

The function returns either a WP_User object on success or false on failure.


How to get user data by user ID

Use the get_userdata function to retrieve user data by user ID.

$user_id = 123;
$user_data = get_userdata( $user_id );

This code snippet retrieves the user data for the user with the ID of 123. The get_userdata function returns an object containing the user’s data, such as username, email, and display name.

How to check if user data exists

Use the get_userdata function to check if user data exists for a given user ID.

$user_id = 456;
$user_data = get_userdata( $user_id );

if ( $user_data ) {
 echo 'User data exists';
} else {
 echo 'User data does not exist';

This code snippet checks if user data exists for the user with the ID of 456. If user data is found, it will output ‘User data exists’, otherwise it will output ‘User data does not exist’.


In conclusion, the get_userdata function is a valuable component for retrieving user data in WordPress. It provides a convenient way to access information about a specific user, such as their username, email, and other profile details. By using this function, developers can easily customize user experiences and create personalized content for users on their websites. With its flexibility and ease of use, get_userdata is an essential function for any WordPress developer looking to work with user data.

Related WordPress Functions