WordPress at a glance
function is not described

WP_Customize_Manager::add_dynamic_settings() public WP 4.2.0

Register any dynamically-created settings, such as those from $_POST['customized'] that have no corresponding setting created.

This is a mechanism to "wake up" settings that have been dynamically created on the front end and have been sent to WordPress in $_POST['customized']. When WP loads, the dynamically-created settings then will get created and previewed even though they are not directly created statically with code.

{} It's a method of the class: WP_Customize_Manager{}

Return

Array. The WP_Customize_Setting objects added.

Usage

$WP_Customize_Manager = new WP_Customize_Manager();
$WP_Customize_Manager->add_dynamic_settings( $setting_ids );
$setting_ids(array) (required)
The setting IDs to add.

Changelog

Since 4.2.0 Introduced.

Code of WP_Customize_Manager::add_dynamic_settings() WP 5.5.3

<?php
public function add_dynamic_settings( $setting_ids ) {
	$new_settings = array();
	foreach ( $setting_ids as $setting_id ) {
		// Skip settings already created.
		if ( $this->get_setting( $setting_id ) ) {
			continue;
		}

		$setting_args  = false;
		$setting_class = 'WP_Customize_Setting';

		/**
		 * Filters a dynamic setting's constructor args.
		 *
		 * For a dynamic setting to be registered, this filter must be employed
		 * to override the default false value with an array of args to pass to
		 * the WP_Customize_Setting constructor.
		 *
		 * @since 4.2.0
		 *
		 * @param false|array $setting_args The arguments to the WP_Customize_Setting constructor.
		 * @param string      $setting_id   ID for dynamic setting, usually coming from `$_POST['customized']`.
		 */
		$setting_args = apply_filters( 'customize_dynamic_setting_args', $setting_args, $setting_id );
		if ( false === $setting_args ) {
			continue;
		}

		/**
		 * Allow non-statically created settings to be constructed with custom WP_Customize_Setting subclass.
		 *
		 * @since 4.2.0
		 *
		 * @param string $setting_class WP_Customize_Setting or a subclass.
		 * @param string $setting_id    ID for dynamic setting, usually coming from `$_POST['customized']`.
		 * @param array  $setting_args  WP_Customize_Setting or a subclass.
		 */
		$setting_class = apply_filters( 'customize_dynamic_setting_class', $setting_class, $setting_id, $setting_args );

		$setting = new $setting_class( $this, $setting_id, $setting_args );

		$this->add_setting( $setting );
		$new_settings[] = $setting;
	}
	return $new_settings;
}