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Multi-dem array sort

Posted on 2006-07-20
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Last Modified: 2008-03-17
Multi-demension arrays always get me... I need help sorting this array two ways.

Array
(
    [1] => Array
        (
            [timestamp] => 1153408578
        )
    [2] => Array
        (
            [timestamp] => 1153408589
        )
    [3] => Array
        (
            [timestamp] => 1153408592
        )
    [2.txt] => Array
        (
            [timestamp] => 1153408593
        )
    [3.txt] => Array
        (
            [timestamp] => 1153408593
        )
)

#1 : I would like to sort the array by the key, maintaining the inside array. I tried ksort, but it did not appear to work.

#2 : I would like to sort the array the array but the timestamp, maintaining the associations.

Thanks
0
Comment
Question by:qwertq
  • 3
  • 2
  • 2
7 Comments
 
LVL 33

Accepted Solution

by:
snoyes_jw earned 1000 total points
ID: 17148618
Can you show what you tried for #1, what it produced, and what you wanted instead?

For #2, we'll extract the timestamps in order, and then pass that as the first parameter to array_multisort, and your multi-d array as the second..
$reference = array();
foreach ($yourArray as $row)
  $reference[] = $row['timestamp'];
array_multisort($reference, $yourArray);
0
 

Author Comment

by:qwertq
ID: 17149553
this array has been ksort($array) 'ed

notice how it is out of order (the keys). the 1 is at the bottom and the 1.txt is at the top... ?

Array
(
    [1.txt] => Array
        (
            [timestamp] => 1153408592
        )

    [2.txt] => Array
        (
            [timestamp] => 1153408593
        )

    [3.txt] => Array
        (
            [timestamp] => 1153408593
        )

    [a] => Array
        (
            [timestamp] => 1153408596
        )

    [a.jpg] => Array
        (
            [timestamp] => 1153414940
        )

    [b] => Array
        (
            [timestamp] => 1153408599
        )

    [b.jpg] => Array
        (
            [timestamp] => 1153417257
        )

    [c] => Array
        (
            [timestamp] => 1153408604
        )

    [c.jpg] => Array
        (
            [timestamp] => 1153417279
        )

    [1] => Array
        (
            [timestamp] => 1153408578
        )

    [2] => Array
        (
            [timestamp] => 1153408589
        )

    [3] => Array
        (
            [timestamp] => 1153408592
        )

)
0
 
LVL 7

Expert Comment

by:maUru
ID: 17149663
that is normal ksort behaviour, 1.txt comes before 1

and 1. comes before 1.txt

no idea why, something do with how ksort works..
0
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Author Comment

by:qwertq
ID: 17149780
why is 1 coming after a then?
0
 
LVL 7

Expert Comment

by:maUru
ID: 17149825
why are we here?
is there a god?
why dont you ask the guy who wrote ksort.

it seems a string 'a' will come before a string '1'

but an integer 1 will come before a string 'a'

0
 

Author Comment

by:qwertq
ID: 17149932
can you suggest an atlerntaive to sort by key as all strings. i would like it to display the normal human way of alphabatizing
0
 
LVL 33

Assisted Solution

by:snoyes_jw
snoyes_jw earned 1000 total points
ID: 17153853
Try passing the constant SORT_STRING as a second parameter to ksort.
0

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