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#1 I'm not 100% sure ...

Eric Weik's picture

Submitted by Eric Weik on Mon, 11/30/2009 - 15:33.

I'm not 100% sure on this one, but I believe that PHP actually handles the serialization, not Drupal.

Drupal registers its own session handlers (sess_read(), sess_write(), etc.) with a call to the PHP internal function session_set_save_handler() in includes/bootstrap.inc (see case DRUPAL_BOOTSTRAP_SESSION in _drupal_bootstrap().

Looking at the source to Drupal's session handler sess_write(), it looks to me like assumes the value passed to it is already serialized. It stores the key and value directly to the {session} table with an UPDATE query.

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