is there different between sort() / rsort() and asort() / arsort()?
I did not find any different between using both of them with the arrays, those example on page 122 and 123?
I tried both of the ways and I got the same : this is what I got :

Array ( [0] => Array ( [name] => nawar [l-name] => youssef [age] => 25 ) [1] => Array ( [name] => jiana [l-name] => youssef [age] => 27 ) [2] => Array ( [name] => george [l-name] => youssef [age] => 21 ) )
Array ( [0] => Array ( [name] => george [l-name] => youssef [age] => 21 ) [1] => Array ( [name] => jiana [l-name] => youssef [age] => 27 ) [2] => Array ( [name] => nawar [l-name] => youssef [age] => 25 ) )

is there any problem with that, maybe I am missing something?
thanks