PHP Set Array Key to Value Inside that Array

Question

I have an array which looks like (var_dump):

array (size=3)
0 => 
   array (size=8)
  'id' => string '1' (length=1)
  'user_id' => string '64' (length=2)
  'level' => string '1' (length=1)
  'score' => string '9999' (length=4)
  't1' => string '1' (length=1)
  't2' => string '0' (length=1)
  't3' => string '0' (length=1)
  'attempts' => string '1' (length=1)
1 => 
  array (size=8)
  'id' => string '2' (length=1)
  'user_id' => string '64' (length=2)
  'level' => string '2' (length=1)
  'score' => string '123456789' (length=9)
  't1' => string '1' (length=1)
  't2' => string '1' (length=1)
  't3' => string '0' (length=1)
  'attempts' => string '4' (length=1)
2 => 
  array (size=8)
  'id' => string '3' (length=1)
  'user_id' => string '64' (length=2)
  'level' => string '3' (length=1)
  'score' => string '123456789' (length=9)
  't1' => string '1' (length=1)
  't2' => string '1' (length=1)
  't3' => string '0' (length=1)
  'attempts' => string '7' (length=1)

How can I change the key 0, 1, 2 etc.. to be the value of level inside that array?

For example:

1 => 
   array (size=8)
  'id' => string '1' (length=1)
  'user_id' => string '64' (length=2)
  'level' => string '1' (length=1)
  'score' => string '9999' (length=4)
  't1' => string '1' (length=1)
  't2' => string '0' (length=1)
  't3' => string '0' (length=1)
  'attempts' => string '1' (length=1)
2 => 
  array (size=8)
  'id' => string '2' (length=1)
  'user_id' => string '64' (length=2)
  'level' => string '2' (length=1)
  'score' => string '123456789' (length=9)
  't1' => string '1' (length=1)
  't2' => string '1' (length=1)
  't3' => string '0' (length=1)
  'attempts' => string '4' (length=1)
3 => 
  array (size=8)
  'id' => string '3' (length=1)
  'user_id' => string '64' (length=2)
  'level' => string '3' (length=1)
  'score' => string '123456789' (length=9)
  't1' => string '1' (length=1)
  't2' => string '1' (length=1)
  't3' => string '0' (length=1)
  'attempts' => string '7' (length=1)

I have already tried renaming the key inside a forloop, that did not replace only the key, but instead, it replaced the whole array and left it blank.

Thanks

Checkout this SO answer: http://stackoverflow.com/questions/240660/in-php-how-do-you-change-the-key-of-an-array-element — Criesto, Sep 04 '15 at 12:35
@Criesto when I used this code, it replaced the second dimensional array. — Nicholas Mordecai, Sep 04 '15 at 12:46
@NicholasMordecai can you ask a new question, this question has been closed and so, I can't post an answer. — Criesto, Sep 04 '15 at 13:00

score 0 · Answer 1 · answered Sep 04 '15 at 12:32

0

$arr = [ ['id'=>1], ['id'=>2],  ['id'=>3]];

$new = [];

foreach($arr as $item)  
    $new[$item['id']] = $item;

print_r($new);

result

Array (
    [1] => Array ( [id] => 1)
    [2] => Array ( [id] => 2)
    [3] => Array ( [id] => 3)
}

answered Sep 04 '15 at 12:32

splash58

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PHP Set Array Key to Value Inside that Array

1 Answers1