WordPress Ajax

functions.php

<?php
function statar_scripts() {
  	wp_enqueue_script( 'main-js', get_template_directory_uri() . '/js/main.js', array('jquery'), '20151215', true );
	  wp_localize_script( 'main-js', 'ajax_url', admin_url( 'admin-ajax.php' ));
}

add_action( 'wp_enqueue_scripts', 'statar_scripts' );

/**
*	Ajax Calling
*/
add_action( 'wp_ajax_my_action', 'my_action_cb' ); // for logged user
add_action( 'wp_ajax_nopriv_my_action', 'my_action_cb' ); // for not logged user

function my_action_cb() {
	print_r($_POST);
	die;
}

main.js

;(function($) {
	$.ajax({
		url: ajax_url,
		method: 'POST',
		data: {
			action: 'my_action',
			value: 'some testing value'
		},

		success: function(data) {
			console.log(data);
		}
	});
})(jQuery);