<?php

$fake_session = array();
$markers = array(0, 8, 36);
$fake_session['markers'] = $markers;
var_dump($fake_session);

?>

array(1) {
  ["markers"]=>
  array(3) {
    [0]=>
    int(0)
    [1]=>
    int(8)
    [2]=>
    int(36)
  }
}