WordPress : AJAX

functions.js

$(document).on('click', '.tour-img, .view-tour', function (e) { //onclick button
    $.ajax({
        type : "post",
        dataType : "json",
        url : kmdscrpt.ajaxurl,
        data : {
            action: "template_tourpackages", //action to Result PHP
            post_id : $(this).attr('data-id'), // passing post ID
            security: kmdscrpt.security // passing security
        },
        success: function(response) { //on succes
           if(response.type == "success") {
              jQuery("#popup-tour").html(response.like_count);
              $('.popup-tour-body').css({ "display": "block" }); //display template
           }
           else {
              alert("Tour package could not be added");
           }
        }
     });
    //ajax get template tour packages
});

functions.php

function theme_scripts()
  wp_enqueue_script( 'komodoluxury-single', THEME_URI . 'assets/js/functions.js', array('jquery-core'), false, true);
  wp_localize_script( 'komodoluxury-single', 'kmdscrpt', array( 
      'ajaxurl' => admin_url( 'admin-ajax.php' ), //add ajax url
      'security' => wp_create_nonce( 'kmd_nonce' ), //add security url
  ));  
}

//Result PHP
add_action("wp_ajax_template_tourpackages", "komodoluxury_template_tourpackages");
add_action("wp_ajax_nopriv_template_tourpackages", "komodoluxury_template_tourpackages");
function komodoluxury_template_tourpackages(){
  check_ajax_referer( 'kmd_nonce', 'security' ); //check security
  echo $_REQUEST['post_id']; //retrive post ID
  //Result Data
  wp_die();
}