Description:
------------
$ar = array(array("10", 100, 100, "a"), array(1, 3, "2", 1)); 

we now must do:
array_multisort($ar[0], SORT_ASC, SORT_STRING, 
               $ar[1], SORT_NUMERIC, SORT_DESC); 

1.
========

how about:
array_multisort($ar, "0", SORT_ASC, SORT_STRING, 
               "1", SORT_NUMERIC, SORT_DESC); 

but "int" type of key may mixed with sort flags :(

nicer example:
$ar = array('abc' => array("10", 100, 100, "a"), 'def' => array(1, 3, "2", 1)); 
array_multisort($ar, "abc", SORT_ASC, SORT_STRING, 
               "def", SORT_NUMERIC, SORT_DESC); 

this is VERY useful when you have so many arrays in $ar, but only want to sort BY some of it

2.
========
because "SHOW PROCESSLIST" cannot do a "ORDER BY"
we need:
/*
$rows = array();
while ($row = mysqli_fetch_assoc()) {
  $rows[] = $row;
}
*/
$rows = array(
  array('a' => "10", 'b' => 100, 'c' => 100, 'd' => "a"),
  array('a' => 1, 'a' => 3, 'a' => "2", 'd' => 1)
); 
array_multisort_rows($row, "a", SORT_ASC, SORT_STRING, 
               "b", SORT_NUMERIC, SORT_DESC);