WordPress at a glance
filter is not described

rest_pre_get_setting filter-hook . WP 4.7.0

Filters the value of a setting recognized by the REST API.

Allow hijacking the setting value and overriding the built-in behavior by returning a non-null value. The returned value will be presented as the setting value instead.

Usage

add_filter( 'rest_pre_get_setting', 'filter_function_name_7862', 10, 3 );
function filter_function_name_7862( $result, $name, $args ){
	// filter...

	return $result;
}
$result(mixed)
Value to use for the requested setting. Can be a scalar matching the registered schema for the setting, or null to follow the default get_option() behavior.
$name(string)
Setting name (as shown in REST API responses).
$args(array)
Arguments passed to register_setting() for this setting.

Where the hook is called

WP_REST_Settings_Controller::get_item()
wp-includes/rest-api/endpoints/class-wp-rest-settings-controller.php 95
$response[ $name ] = apply_filters( 'rest_pre_get_setting', null, $name, $args );

Where the hook is used (in WP core)

Does not used.