Array groupby sort in PHP

Hi,

Any function availale to do a group by sort an array conents in PHP?
I need to sort the array elements but it should be a group by sort:

Thanks in Adance

$address[0] = array(name->'Name1', place->'Place1',class='1');
$address[1] = array(name->'Name2', place->'Place1'class='2');
$address[2] = array(name->'Name3', place->'Place1',class='1');
$address[3] = array(name->'Name4', place->'Place2',class='2');
$address[4] = array(name->'Name5', place->'Place1'class='3');
$address[5] = array(name->'Name6', place->'Place3',class='1');
$address[6] = array(name->'Name7', place->'Place1',class='4');
$address[7] = array(name->'Name5', place->'Place2',class='1');
 
Here i need to group the array elements on class and list the array elements in name order of slelected class.

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