
WordPress高级自定义字段教程
register_setting ( $option_group, $option_name, $args = array() )
register_setting: 这个函数是用来在WordPress中注册一个新的设置。设置可以用来存储插件或主题的配置数据,如API密钥或其他选项。
注册一个设置和它的数据。
function register_setting( $option_group, $option_name, $args = array() ) { global $new_allowed_options, $wp_registered_settings; /* * In 5.5.0, the `$new_whitelist_options` global variable was renamed to `$new_allowed_options`. * Please consider writing more inclusive code. */ $GLOBALS['new_whitelist_options'] = &$new_allowed_options; $defaults = array( 'type' => 'string', 'group' => $option_group, 'description' => '', 'sanitize_callback' => null, 'show_in_rest' => false, ); // Back-compat: old sanitize callback is added. if ( is_callable( $args ) ) { $args = array( 'sanitize_callback' => $args, ); } /** * Filters the registration arguments when registering a setting. * * @since 4.7.0 * * @param array $args Array of setting registration arguments. * @param array $defaults Array of default arguments. * @param string $option_group Setting group. * @param string $option_name Setting name. */ $args = apply_filters( 'register_setting_args', $args, $defaults, $option_group, $option_name ); $args = wp_parse_args( $args, $defaults ); // Require an item schema when registering settings with an array type. if ( false !== $args['show_in_rest'] && 'array' === $args['type'] && ( ! is_array( $args['show_in_rest'] ) || ! isset( $args['show_in_rest']['schema']['items'] ) ) ) { _doing_it_wrong( __FUNCTION__, __( 'When registering an "array" setting to show in the REST API, you must specify the schema for each array item in "show_in_rest.schema.items".' ), '5.4.0' ); } if ( ! is_array( $wp_registered_settings ) ) { $wp_registered_settings = array(); } if ( 'misc' === $option_group ) { _deprecated_argument( __FUNCTION__, '3.0.0', sprintf( /* translators: %s: misc */ __( 'The "%s" options group has been removed. Use another settings group.' ), 'misc' ) ); $option_group = 'general'; } if ( 'privacy' === $option_group ) { _deprecated_argument( __FUNCTION__, '3.5.0', sprintf( /* translators: %s: privacy */ __( 'The "%s" options group has been removed. Use another settings group.' ), 'privacy' ) ); $option_group = 'reading'; } $new_allowed_options[ $option_group ][] = $option_name; if ( ! empty( $args['sanitize_callback'] ) ) { add_filter( "sanitize_option_{$option_name}", $args['sanitize_callback'] ); } if ( array_key_exists( 'default', $args ) ) { add_filter( "default_option_{$option_name}", 'filter_default_option', 10, 3 ); } /** * Fires immediately before the setting is registered but after its filters are in place. * * @since 5.5.0 * * @param string $option_group Setting group. * @param string $option_name Setting name. * @param array $args Array of setting registration arguments. */ do_action( 'register_setting', $option_group, $option_name, $args ); $wp_registered_settings[ $option_name ] = $args; }