get_userdata( int $user_id )

Retrieve user info by user ID.

Description

Parameters

$user_id

(int) (Required) User ID

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Return

(WP_User|false) WP_User object on success, false on failure.

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Source

File: wp-includes/pluggable.php 

	function get_userdata( $user_id ) {
		return get_user_by( 'id', $user_id );
	}

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Changelog

Version Description
0.71 Introduced.

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Used By

Used By Description
wp-includes/class-wp-query.php: WP_Query::generate_postdata()

Generate post data.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::get_lock_user_data()

Get lock user data.
wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php: WP_REST_Users_Controller::get_user()

Get the user, if the ID is valid.
wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php: WP_REST_Users_Controller::delete_item()

Deletes a single user.
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php: WP_REST_Posts_Controller::prepare_item_for_database()

Prepares a single post for create or update.
wp-includes/embed.php: get_oembed_response_data()

Retrieves the oEmbed response data for a given post.
wp-admin/includes/class-wp-posts-list-table.php: WP_Posts_List_Table::column_title()

Handles the title column output.
wp-admin/includes/ajax-actions.php: wp_ajax_destroy_sessions()

Ajax handler for destroying multiple open sessions for a user.
wp-admin/includes/export.php: wxr_authors_list()

Output list of authors with posts
wp-admin/includes/deprecated.php: get_editable_user_ids()

Gets the IDs of any users who can edit posts.
wp-includes/capabilities.php: grant_super_admin()

Grants Super Admin privileges.
wp-includes/capabilities.php: revoke_super_admin()

Revokes Super Admin privileges.
wp-admin/includes/ms.php: refresh_user_details()

Cleans the user cache for a specific user.
wp-admin/includes/misc.php: wp_check_locked_posts()

Check lock status for posts displayed on the Posts screen
wp-admin/includes/misc.php: wp_refresh_post_lock()

Check lock status on the New/Edit Post screen and refresh the lock
wp-admin/includes/schema.php: populate_network()

Populate network settings.
wp-admin/includes/user.php: default_password_nag_edit_user()
wp-admin/includes/user.php: edit_user()

Edit user settings based on contents of $_POST
wp-admin/includes/user.php: get_user_to_edit()

Retrieve user data and filter it.
wp-admin/includes/class-wp-users-list-table.php: WP_Users_List_Table::single_row()

Generate HTML for a single row on the users.php admin panel.
wp-admin/includes/post.php: wp_check_post_lock()

Check to see if the post is currently being edited by another user.
wp-admin/includes/post.php: _admin_notice_post_locked()

Outputs the HTML for the notice to say that someone else is editing or has taken over editing of this post.
wp-admin/includes/ajax-actions.php: wp_ajax_wp_fullscreen_save_post()

Ajax handler for saving posts from the fullscreen editor.
wp-admin/includes/ajax-actions.php: wp_ajax_add_user()

Ajax handler for adding a user.
wp-admin/includes/ajax-actions.php: wp_ajax_inline_save()

Ajax handler for Quick Edit saving a post from a list table.
wp-admin/includes/ms.php: confirm_delete_users()
wp-includes/capabilities.php: is_super_admin()

Determine if user is a site admin.
wp-includes/capabilities.php: author_can()

Returns whether the author of the supplied post has the specified capability.
wp-includes/capabilities.php: user_can()

Returns whether a particular user has the specified capability.
wp-includes/pluggable.php: wp_new_user_notification()

Email login credentials to a newly-registered user.
wp-includes/pluggable.php: wp_notify_postauthor()

Notify an author (and/or others) of a comment/trackback/pingback on a post.
wp-includes/pluggable.php: wp_notify_moderator()

Notifies the moderator of the site about a new comment that is awaiting approval.
wp-includes/pluggable.php: wp_generate_auth_cookie()

Generates authentication cookie contents.
wp-includes/deprecated.php: user_can_create_post()

Whether user can create a post.
wp-includes/deprecated.php: user_can_create_draft()

Whether user can create a post.
wp-includes/deprecated.php: user_can_edit_post()

Whether user can edit a post.
wp-includes/deprecated.php: user_can_set_post_date()

Whether user can set new posts’ dates.
wp-includes/deprecated.php: user_can_edit_post_date()

Whether user can delete a post.
wp-includes/deprecated.php: user_can_edit_user()

Can user can edit other user.
wp-includes/class-wp.php: WP::register_globals()

Set up the WordPress Globals.
wp-includes/class-wp-query.php: WP_Query::get_queried_object()

Retrieve queried object.
wp-includes/link-template.php: get_edit_user_link()

Retrieves the edit user link.
wp-includes/link-template.php: get_permalink()

Retrieves the full permalink for the current post or post ID.
wp-includes/admin-bar.php: wp_admin_bar_edit_menu()

Provide an edit link for posts and terms.
wp-includes/user.php: wp_update_user()

Update a user in the database.
wp-includes/user.php: wp_insert_user()

Insert a user into the database.
wp-includes/user.php: is_user_member_of_blog()

Find out whether a user is a member of a given blog.
wp-includes/user.php: setup_userdata()

Set up global user vars.
wp-includes/user.php: wp_dropdown_users()

Create dropdown HTML content of users.
wp-includes/user.php: get_user_option()

Retrieve user option that can be either per Site or per Network.
wp-includes/canonical.php: redirect_canonical()

Redirects incoming links to the proper URL based on the site url.
wp-includes/ms-functions.php: wpmu_welcome_user_notification()

Notify a user that their account activation has been successful.
wp-includes/ms-functions.php: wpmu_log_new_registrations()

Logs the user email, IP, and registration date of a new site.
wp-includes/ms-functions.php: newuser_notify_siteadmin()

Notifies the network admin that a new user has been activated.
wp-includes/ms-functions.php: wpmu_welcome_notification()

Notify a user that their blog activation has been successful.
wp-includes/ms-functions.php: add_user_to_blog()

Adds a user to a blog.
wp-includes/ms-functions.php: remove_user_from_blog()

Remove a user from a blog.
wp-includes/author-template.php: get_author_posts_url()

Retrieve the URL to the author page for the user with the ID provided.
wp-includes/author-template.php: wp_list_authors()

List all the authors of the site, with several options available.
wp-includes/author-template.php: get_the_author_meta()

Retrieves the requested data of the author of the current post.
wp-includes/author-template.php: get_the_modified_author()

Retrieve the author who last edited the current post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mw_getPost()

Retrieve post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mw_getRecentPosts()

Retrieve list of recent posts.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mw_newPost()

Create a new post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getUser()

Retrieve a user.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getProfile()

Retrieve information about the requesting user.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::_prepare_page()

Prepares page data for return in an XML-RPC object.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::_insert_post()

Helper method for wp_newPost() and wp_editPost(), containing shared logic.
wp-includes/comment-template.php: get_comment_class()

Returns the classes for the comment div as an array.
wp-includes/comment-template.php: get_comment_author()

Retrieve the author of the current comment.
wp-includes/comment.php: wp_allow_comment()

Validates whether this comment is allowed to be made.