Question

Tech used: PHP 5.3.10

Hi, I have an array (example below) I need to manipulate by combining the same times, concat any applicable offerId’s to a comma delimted string and finally return the string sorted by time! Not much then 🙂

I looked at this answer to ID the rows: https://stackoverflow.com/a/1019534/260023 however I drew a blank once I had identified the row how to modily the data in it…

Array
(
[0] => Array
    (
        [dateTime] => 2012-04-03T18:00:00
        [offerIDs] => 
    )

[1] => Array
    (
        [dateTime] => 2012-04-03T18:30:00
        [offerIDs] => 
    )

[2] => Array
    (
        [dateTime] => 2012-04-03T19:00:00
        [offerIDs] => 
    )

[3] => Array
    (
        [dateTime] => 2012-04-03T21:00:00
        [offerIDs] => 
    )


[4] => Array
    (
        [dateTime] => 2012-04-03T18:00:00
        [offerIDs] => 17302
    )

[5] => Array
    (
        [dateTime] => 2012-04-03T18:30:00
        [offerIDs] => 17302
    )

[6] => Array
    (
        [dateTime] => 2012-04-03T19:00:00
        [offerIDs] => 17302
    )

[7] => Array
    (
        [dateTime] => 2012-04-03T19:30:00
        [offerIDs] => 17302
    )

[8] => Array
    (
        [dateTime] => 2012-04-03T20:00:00
        [offerIDs] => 17302
    )

[9] => Array
    (
        [dateTime] => 2012-04-03T20:30:00
        [offerIDs] => 17302
    )

[10] => Array
    (
        [dateTime] => 2012-04-03T19:00:00
        [offerIDs] => 17298
    )

)

This should result in:

Array
(
[0] => Array
    (
        [dateTime] => 2012-04-03T18:00:00
        [offerIDs] => 17302
    )

[1] => Array
    (
        [dateTime] => 2012-04-03T18:30:00
        [offerIDs] => 17302
    )

[2] => Array
    (
        [dateTime] => 2012-04-03T19:00:00
        [offerIDs] => 17302,17298
    )


[6] => Array
    (
        [dateTime] => 2012-04-03T19:30:00
        [offerIDs] => 17302
    )

[7] => Array
    (
        [dateTime] => 2012-04-03T20:00:00
        [offerIDs] => 17302


[8] => Array
    (
        [dateTime] => 2012-04-03T20:30:00
        [offerIDs] => 17302
    )

[9] => Array
    (
        [dateTime] => 2012-04-03T21:00:00
        [offerIDs] => 
    )
)

Answer 1

Something like this should work:

$newarray = array();

foreach ($array as $elements) {
   if (empty($newarray[$elements['dateTime'])) {
     $newarray[$elements['dateTime']] = $elements['offerIDs'];
   } else {
     $newarray[$elements['dateTime']] .= $elements['offerIDs'];
   }
}

Now run a simple sort by time using the code provided by mingos.

The re-arrange the array:

$finalarray = array();

foreach ($array as $d => $v) {
    $finalarray[] = array('dateTime' = $d, 'offerIDs' => $v);
}