Re: Unexpected results using ksort on arrays in which the keys are mixed alphanumeric strings.

Clancy schreef: > I have been experimenting using four character alphanumeric keys on an array, and when I > generated a random set of keys, and then used ksort to sort the array, I was very > surprised to find that if the key contained any non-numeric character, or if it started > with zero, the key was sorted as a base 36 number (0- 9, A-Z, as I expected. However if > the key only contained numbers, and did not start with zero, it was sorted to the end of > the list. did your experiment include reading the manual? or did you expect ksort() to known what kind of sort you wanted? ... try specifying a sort flag: <?php $r = array( 'ASDF' => true, '000A' => true, '0009' => true, '0999' => true, '0000' => true, '09A0' => true, '9999' => true, '1000' => true, 'ZZZZ' => true, ); echo "UNSORTED:\n"; print_r($r); echo "SORT_REGULAR:\n"; ksort($r, SORT_REGULAR); print_r($r); echo "SORT_NUMERIC:\n"; ksort($r, SORT_NUMERIC); print_r($r); echo "SORT_STRING:\n"; ksort($r, SORT_STRING); print_r($r); > > Thus: > 0000 > 0009 > 000A > > 0999 > 09A0 > ASDF > > ZZZZ > 1000 > 9999 > > I presume this is related to last weeks discussions about casting variables, but I cannot > understand why 0999 should go to the start of the list, while 1000 goes to the end. Can > anyone explain this logically? >