How to deal with field on the database that stores variable array's?

Hi,

I need to develop a database table that will aceept a variable array field.
My doubt is how to deal with updates on the
array field. How can I store the information of the array fields? There any
examples on the Internet on how to deal with
this subject?

What I mean with variable array is:

array(
'name' => 'Don',
'age' => '31'
);

array(
'name' => 'Peter',
'age' => '28',
'car' => 'ford',
'km' => '2000'
);

Best Regards,