PHP Replace multidimensional array keys

Question

I would like to replace some keys, my array is:

Array
(
    [0] => Array
        (
            [0] => test1
            [1] => test2
            [2] => test3
            [3] => test4
            [4] => test5
            [5] => test6
        )

    [1] => Array
        (
            [0] => test7
            [1] => test8
            [2] => test9
            [3] => test10
            [4] => test11
            [5] => test12
        )

)

My wish:

Array
(
    [45] => Array
        (
            [0] => test1
            [1] => test2
            [2] => test3
            [3] => test4
            [4] => test5
            [5] => test6
        )

    [51] => Array
        (
            [0] => test7
            [1] => test8
            [2] => test9
            [3] => test10
            [4] => test11
            [5] => test12
        )

)

45 and 51 are examples.

How can I do that? I tried array_flip() then array_search() but PHP says: "Can only flip STRING and INTEGER values!"

Thank's anyway. Regards

$arr[45] = $arr[0]; unset($arr[0]);?

Waleed Khan
– Waleed Khan

2012-11-25 22:25:50 +00:00
Commented Nov 25, 2012 at 22:25 — Waleed Khan
– Waleed Khan, Commented Nov 25, 2012 at 22:25

Samuel Cook · Accepted Answer · 2012-11-25 22:27:11Z

1

$old_array = array(
    0 => array(0=>'test1',1=>'test2',2=>'test3',3=>'test4',4=>'test5',5=>'test6'),
    1 => array(0=>'test1',1=>'test2',2=>'test3',3=>'test4',4=>'test5',5=>'test6')
);
$new_array = array(
    45=>$old_array[0],
    51=>$old_array[1]
);
var_dump($new_array);

answered Nov 25, 2012 at 22:27

Samuel Cook

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Comments

Desmond Hume · Accepted Answer · 2012-11-25 22:34:18Z

A key in an array can be modified by setting the the new key to the value of the old key and then unsetting the old key.

$myArray = array(
    "0" => array("0" => "test1", "1" => "test2"),
    "1" => array("0" => "test3", "1" => "test4"));

echo "original array:\n";
var_dump($myArray);

// modify keys
$myArray["45"] = $myArray["0"];
unset($myArray["0"]);
$myArray["51"] = $myArray["1"];
unset($myArray["1"]);

echo "modified array:\n";
var_dump($myArray);

generates:

original array:
array(2) {
  [0]=>
  array(2) {
    [0]=>
    string(5) "test1"
    [1]=>
    string(5) "test2"
  }
  [1]=>
  array(2) {
    [0]=>
    string(5) "test3"
    [1]=>
    string(5) "test4"
  }
}

modified array:
array(2) {
  [45]=>
  array(2) {
    [0]=>
    string(5) "test1"
    [1]=>
    string(5) "test2"
  }
  [51]=>
  array(2) {
    [0]=>
    string(5) "test3"
    [1]=>
    string(5) "test4"
  }
}

M Rostami · Accepted Answer · 2012-11-25 22:39:56Z

0

$keys = array('45','51');
$count = 6 ;
$i = 0;
foreach($keys as $key){
   for($l = 0;$l<$count;$l++){
      $last[$key][$l] = 'test'.$l+$i+1 ;
   }
  $i += $count;
}
print_r($last);

set $count to any number of arrays that you want .

answered Nov 25, 2012 at 22:39

M Rostami

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