Get value from cartsession with unserialize

[kariem112]

I need to do a cart modification. I can print out the unserialized cart data with:

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<?php  print_r(unserialize($_SESSION['__vm']['vmcart'])); ?>

The output starts with:

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stdClass Object ( [products] => Array ( [531] => stdClass Object ( [attr1] => [attr2] => S [attr_stock] => 3 [attr1_title] => [attr2_title] => Maat

Now I want to put attr1, attr2 and attr1_title and attr2_title each in different variables..  How would I be able to do that?