1. settings api

2. codex.wordpress.org/Settings_API

3. The Settings API, added in
WordPress 2.7, allows admin pages
containing settings forms to be
managed semi-automatically. It lets you
define settings pages, sections within
those pages and fields within the
sections.

4. 6
“general”
functions

5. settings_fields($option_group);
6
register_setting($option_group, $option_name, $sanitize_callback="");
unregister_setting($option_group, $option_name, $sanitize_callback="");
add_settings_section($id, $title, $callback, $page);
add_settings_field($id, $title, $callback, $page, $section, $args = array());
do_settings_sections($page)

6. $option_group – unique group name for option set
$option_name – name of each option
$sanitize_callback="" – section/field callback function for validation
$id – unique ID for the section/field
$title – the title of the section/field (displayed on options page)
$callback – callback function to be executed
$page – options page name (use __FILE__ if creating new options page)
$section – ID of the settings section (same as $id in
add_settings_section)
$args = array() – additional arguments

7. live example