WP_Widget_Media::update( array $new_instance, array $old_instance ): array

Source

public function update( $new_instance, $old_instance ) {

	$schema = $this->get_instance_schema();
	foreach ( $schema as $field => $field_schema ) {
		if ( ! array_key_exists( $field, $new_instance ) ) {
			continue;
		}
		$value = $new_instance[ $field ];

		/*
		 * Workaround for rest_validate_value_from_schema() due to the fact that
		 * rest_is_boolean( '' ) === false, while rest_is_boolean( '1' ) is true.
		 */
		if ( 'boolean' === $field_schema['type'] && '' === $value ) {
			$value = false;
		}

		if ( true !== rest_validate_value_from_schema( $value, $field_schema, $field ) ) {
			continue;
		}

		$value = rest_sanitize_value_from_schema( $value, $field_schema );

		// @codeCoverageIgnoreStart
		if ( is_wp_error( $value ) ) {
			continue; // Handle case when rest_sanitize_value_from_schema() ever returns WP_Error as its phpdoc @return tag indicates.
		}

		// @codeCoverageIgnoreEnd
		if ( isset( $field_schema['sanitize_callback'] ) ) {
			$value = call_user_func( $field_schema['sanitize_callback'], $value );
		}
		if ( is_wp_error( $value ) ) {
			continue;
		}
		$old_instance[ $field ] = $value;
	}

	return $old_instance;
}

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