Replace Multidimensional Array values

Question

I have a multidimensional array and i want to replace the timestamp field in it..

Array
(
    [new_messages] => 0
    [0] => Array
        (
            [id] => 42
            [sender] => 4
            [receiver] => 4
            [message] => Test
            [timestamp] => 1368178683
            [read] => 1
            [s_deleted] => 0
            [r_deleted] => 0
        )

    [1] => Array
        (
            [id] => 44
            [sender] => 4
            [receiver] => 4
            [message] => test2
            [timestamp] => 1368181485
            [read] => 1
            [s_deleted] => 0
            [r_deleted] => 0
        )
)

I run:

foreach ($messageArray as $key => $row) {
   $orderByDate[$key]  = $row['timestamp'];
   $newTimestamp = date("d-M-Y H:i:s", $row['timestamp']);
   $messageArray[$key]['timestamp'] = $newTimestamp;
}

It does work, replaces it, but i get a Warning:

Warning: Cannot use a scalar value as an array

Why? And how to solve it?

nice ass · Accepted Answer · 2013-05-12 19:46:23Z

1

It looks like some of your root array elements are not arrays, like:

[new_messages] => 0

So there's no timestamp key to access. Just add:

if(!is_array($row))
  continue;

answered May 12, 2013 at 19:46

nice ass

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Comments

rpkamp · Accepted Answer · 2013-05-12 19:47:51Z

0

It also wants to change the timestamp of the key new_messages, but there isn't one (it's just a single value).

Change to this

foreach ($messageArray as $key => $row) {
   if (!is_array($row) || !array_key_exists('timestamp', $row)) {
     continue;
   }
   $orderByDate[$key]  = $row['timestamp'];
   $newTimestamp = date("d-M-Y H:i:s", $row['timestamp']);
   $messageArray[$key]['timestamp'] = $newTimestamp;
}

answered May 12, 2013 at 19:47

rpkamp

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