WP_Customize_Manager::set_preview_url() WordPress Method

The WP_Customize_Manager::set_preview_url() method allows you to set the URL of the page that will be used for previewing changes made in the Customizer. This is useful if you want to preview changes on a different page than the one that is currently being displayed.

WP_Customize_Manager::set_preview_url( string $preview_url ) #

	public function set_preview_url( $preview_url ) {
		$preview_url       = esc_url_raw( $preview_url );
		$this->preview_url = wp_validate_redirect( $preview_url, home_url( '/' ) );
	}