php中将一个对象保存到Session中的方法

<?php
//
//File: person_class.inc.php
//Contains the class definition necessary to let an object be a session
//variable.
//
class Person
{
  var $name;
  var $email;
  //
  // A simple function to illustrate the point
  //
  function clean_name ()
  {
    $name = preg_replace("/h(.)+/i", "\\1", $this->name);
    return substr($name, 0, 15);
  }
}
?>

<?php
//
//File: main.php
//Here is where we save and retrieve the object
//
include_once 'person_class.inc.php';
session_register('someperson');
if (!$someperson) {
  $someperson = new Foo;
  $someperson->name = "Item Raja";
  $someperson->email = "itemraja@php.net";
  $someperson->clean_name();
}
?>
<a href="somePage.php">Click Here</a>

<?php
//
//File: somePage.php
//Print out the name without initializing the
//class and setting the variables
//
include_once 'person_class.inc.php';
session_register('foobar');
print $foobar->name;
?>