Hi Stan,

Are you saving the instance of your class in $_SESSION?

Class instances can be persisted across sessions, however resources (i.e. MySQL and other DB connections) cannot. What you need to do, is every method in your wrapper class that uses the MySQL resource needs to check if it's a valid resource (is_resource() springs to mind.)

If it isn't valid, you need to re-create it (using mysql_connect).

The reason for this is that PHP isn't running between session requests, so it cannot maintain and monitor the database connection across requests.


On 9 November2009, at 21:11, Stan wrote:

I got as far as creating a class to be the wrapper ... instantiating an object of that class ... saving the reference in a $_SESSION variable ... but my object reference seems to be invalid upon the next request (in the
same session) from the client browser.  What have I missed?


""Andy Shellam (Mailing Lists)"" <andy-li...@networkmail.eu> wrote in
message news:fd8200b0-e18a-4afd-8ffc-f51080621...@networkmail.eu...

I got around this by creating a database wrapper class which gets
passed the credentials from the app's config file. An instance of the
class is created and saved in the session, and every query to the
database runs through the class's Query() wrapper method which checks
if the connection is alive and valid - if it isn't, it reconnects it
before running the query.


On 9 November2009, at 16:46, Stan wrote:

How do I make an Object persistant for the duration of a Session?
"Chris" <dmag...@gmail.com> wrote in message news:4AB6B16C.
Niel Archer wrote:
I'm maintaining a session.  I successfully connect to a database
= mysql_connect()).  I save the connection resource in a session
($_SESSION['connection'] = $DBConnect) ... to use in subsequent
queries.  It
remains valid while the user is on the current page.
print_r($_SESSION['connection']) yields 'Resource id #3', for

User browses to a new page ... in the same session.
no longer references a valid mysql resource.
print_r($_SESSION['connection']) yields '0'.

Other "ordinary" values saved in $_SESSION variables remain valid.

Is there something special about a mysql resource?

Not about the resource itself, no. PHP closes connections to a Db
when a
script ends, unless the connection is persistent, so while the
IS saved, the connection to which it refers no longer exists.

No resources (whether they are persistent or not) can be stored in


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