PHP Variables made with foreach

I have several variables coming from an array in $POST_['array'] i wish to make some kind of loop for example foreach that makes, for every value in the variable a variable name of it and assigns the value for it.

For example if i have

$POST_['name'];
$POST_['last'];
$POST_['age'];
$POST_['sex'];

I want the loop to create each variable from the array inside the $_POST with the name of the variable like the following:

$name = 'John';
$last = 'Doe';
$age = '32';
$sex = 'male';

NOTE - The array is coming from a serialized jquery string that puts together all the variables and values in a form into one big string.

Is this possible?