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wp-includes/ms-site.php:
wp_initialize_site()
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Runs the initialization routine for a given site.
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wp-admin/includes/class-wp-screen.php:
WP_Screen::render_meta_boxes_preferences()
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Render the meta boxes preferences.
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wp-admin/includes/ajax-actions.php:
wp_ajax_save_wporg_username()
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Ajax handler for saving the user’s WordPress.org username.
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wp-includes/class-wp-user-meta-session-tokens.php:
WP_User_Meta_Session_Tokens::update_sessions()
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Updates the user’s sessions in the usermeta table.
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wp-admin/includes/ms.php:
choose_primary_blog()
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Handles the display of choosing a user’s primary site.
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wp-includes/user.php:
send_confirmation_on_profile_email()
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Send a confirmation request email when a change of user email address is attempted.
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wp-admin/includes/misc.php:
set_screen_options()
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Saves option for number of rows when listing posts, pages, comments, etc.
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wp-admin/includes/schema.php:
populate_network()
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Populate network settings.
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wp-admin/includes/upgrade.php:
wp_install_defaults()
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Creates the initial content for a newly-installed site.
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wp-admin/includes/class-wp-plugin-install-list-table.php:
WP_Plugin_Install_List_Table::prepare_items()
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wp-admin/includes/ajax-actions.php:
wp_ajax_save_user_color_scheme()
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Ajax handler for auto-saving the selected color scheme for a user’s own profile.
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wp-admin/includes/ajax-actions.php:
wp_ajax_dismiss_wp_pointer()
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Ajax handler for dismissing a WordPress pointer.
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wp-admin/includes/ajax-actions.php:
wp_ajax_update_welcome_panel()
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Ajax handler for updating whether to display the welcome panel.
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wp-includes/class-wp-user.php:
WP_User::update_user_level_from_caps()
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Update the maximum user level for the user.
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wp-includes/class-wp-user.php:
WP_User::add_cap()
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Add capability and grant or deny access to capability.
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wp-includes/class-wp-user.php:
WP_User::remove_cap()
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Remove capability from user.
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wp-includes/class-wp-user.php:
WP_User::add_role()
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Add role to user.
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wp-includes/class-wp-user.php:
WP_User::remove_role()
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Remove role from user.
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wp-includes/class-wp-user.php:
WP_User::set_role()
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Set the role of the user.
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wp-includes/user.php:
wp_insert_user()
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Insert a user into the database.
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wp-includes/user.php:
update_user_option()
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Update user option with global blog capability.
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wp-includes/ms-functions.php:
add_new_user_to_blog()
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Adds a newly created user to the appropriate blog
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wp-includes/ms-functions.php:
get_active_blog_for_user()
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Get one of a user’s active blogs
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wp-includes/ms-functions.php:
add_user_to_blog()
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Adds a user to a blog.
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wp-includes/ms-functions.php:
remove_user_from_blog()
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Remove a user from a blog.
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how to check for errors
$user_id = 1; $new_value = 'some new value'; // Will return false if the previous value is the same as $new_value. $updated = update_user_meta( $user_id, 'some_meta_key', $new_value ); // So check and make sure the stored value matches $new_value. if ( $new_value != get_user_meta( $user_id, 'some_meta_key', true ) ) { wp_die( __( 'An error occurred', 'textdomain' ) ); }