CODE EXAMPLE FOR PHP

how to add sidebar to page.php

<?php

//Callback function 

function njengah_register_sidebar_tutorial() {
	
	//Register Sidebar function - https://developer.wordpress.org/reference/functions/register_sidebar/
	register_sidebar(
		array(
			'name'          => __( 'Sidebar Example', 'textdomain' ),
			'id'            => 'sidebar-1',
			'description'   => __( 'Add widgets here to appear in your sidebar on blog posts and archive pages.', 'textdomain' ),
			'before_widget' => '<section id="%1$s" class="widget %2$s">',
			'after_widget'  => '</section>',
			'before_title'  => '<h2 class="widget-title">',
			'after_title'   => '</h2>',
		)
	);
	
} 

// Action hook 

add_action( 'widgets_init', 'njengah_register_sidebar_tutorial' );