WP_Customize_Manager::set_post_value PHP Method

    public function set_post_value($setting_id, $value)
    {
        $this->unsanitized_post_values();
        // Populate _post_values from $_POST['customized'].
        $this->_post_values[$setting_id] = $value;
        /**
         * Announce when a specific setting's unsanitized post value has been set.
         *
         * Fires when the WP_Customize_Manager::set_post_value() method is called.
         *
         * The dynamic portion of the hook name, `$setting_id`, refers to the setting ID.
         *
         * @since 4.4.0
         *
         * @param mixed                $value Unsanitized setting post value.
         * @param WP_Customize_Manager $this  WP_Customize_Manager instance.
         */
        do_action("customize_post_value_set_{$setting_id}", $value, $this);
        /**
         * Announce when any setting's unsanitized post value has been set.
         *
         * Fires when the WP_Customize_Manager::set_post_value() method is called.
         *
         * This is useful for `WP_Customize_Setting` instances to watch
         * in order to update a cached previewed value.
         *
         * @since 4.4.0
         *
         * @param string               $setting_id Setting ID.
         * @param mixed                $value      Unsanitized setting post value.
         * @param WP_Customize_Manager $this       WP_Customize_Manager instance.
         */
        do_action('customize_post_value_set', $setting_id, $value, $this);
    }

	function set_customized_post_data( $customized ) {
		$_POST['customized'] = wp_slash( wp_json_encode( $customized ) );
		if ( $this->manager ) {
			foreach ( $customized as $id => $value ) {
				$this->manager->set_post_value( $id, $value );
			}
		}
	}