ajax

JS:

  jQuery(document).ready(function($){
    jQuery('.mappa').each(function() {
     jQuery(this).magnificPopup({
        delegate: 'a',
        type: 'inline',
        midClick: true
      });
    });

    jQuery('.mappa a').click(function(){
     // alert("The id is "+ jQuery(this).attr("data-id") );
      var post_id = jQuery(this).attr("data-name");

jQuery.post(
  ajaxurl,
  {
      'action': 'load_post_content',
      'the_ID': post_id
  },
  function(response){
      jQuery('#opencomune span').html(response);
  }
);
return false;
});
});


FUNCTION:

add_action( 'wp_ajax_load_post_content', 'load_post_content' );
add_action( 'wp_ajax_nopriv_load_post_content', 'load_post_content' );

function load_post_content() {

    $the_post_id = $_POST['the_ID'];
    echo $the_post_id;

}


PAGINA PHP
load_post_content();