Re: [PHP-DB] losing MySQL resource

Stan wrote:
> I don't understand the process.  When session_start() reconnects to a (the)
> session, objects saved as $_SESSION variables must be "recreated".  To do
> this requires the class definition.  So the class definition must be loaded
> prior to calling session_start().
> 
> 
> 
> Some other languages I've written in had a process called serialization
> through which objects were saved.  And an opposite (deserialization?)
> process through which objects were restored.  To have "persistent" objects
> requires some way to "save" the objects for the next invocation of the
> application (PHP in this case).  Deserialization necessarily requires the
> template upon which the original object was built (the class definition).
> 
> 
> 
> I found http://us.php.net/serialize in the online PHP manual.  I also found
> http://us.php.net/manual/en/language.oop5.autoload.php in the online PHP
> manual (I have not tried autoload).
> 
> 
> 
> I simply moved the require_once("class_definitions.inc"); to appear
> immediately before my session_start(); and everything worked thereafter.

When data gets serialized in the session, it only stores the data itself 
(public/private variables). It does not store the actual class (your 
methods) and the code that makes it all work. That would just bloat the 
session and cause other extra headaches.

So before the data can be properly loaded, you need the class.

http://us.php.net/manual/en/language.oop5.serialization.php

explains things a little better I hope.

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