php - I cannot pull out $_SESSION values from a named session -

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i have named session can call using this

print_r($_session['sessionname']);

it returns following out of session variable.

myclass object ( [mycolumn] => myvalue64 [mycolumn2] => 47 [mycolumn3] => 19   )

however when try echo mycolumn this. doesn't display value.

echo $_session['myclass']['mycolumn'];

i'm on php 5.3.3 if helps.

thanks

have tried:

echo $_session->mycolumn

or in case

 echo $_session['sessionname']->mycolumn

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