adding string keys to inner arrays

Question

I wish to add string keys to my inner PHP arrays. So, I want to convert this:

array (size=2)
0 => array (size=3)
  0 => string 'X705' (length=4)
  1 => string 'X723' (length=4)
  2 => string 'Sue' (length=0)
1 => array (size=3)
  0 => string 'X714' (length=4)
  1 => string 'X721' (length=4)
  2 => string 'John' (length=0)

to this:

array (size=2)
0 => 
array (size=3)
  'code1' => string 'X705' (length=4)
  'code2' => string 'X723' (length=4)
  'name' => string 'Sue' (length=0)
1 => 
array (size=3)
  'code1' => string 'X714' (length=4)
  'code2' => string 'X721' (length=4)
  'name' => string 'John' (length=0)

I think I need to use array_walk but cannot fathom it out. Any help appreciated.

Do you need to modify the original array, or create a new array with the string keys? — Don't Panic, Apr 23 '15 at 15:54

score 4 · Accepted Answer · answered Apr 23 '15 at 15:56

4

You can use array_map for that purpose:

$newarray = array_map(function($x) {
    return array("code1" => $x[0], "code2" => $x[1], "name" => $x[2]);
}, $array);

where $array is your input array.

answered Apr 23 '15 at 15:56

sdabet

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Just what I needed. Simple and elegant. Thank you. – Karma Kaos Apr 23 '15 at 18:39

score 0 · Answer 2 · answered Apr 23 '15 at 15:57

0

Start with this:

foreach ($array as $key=>$item) {
  $item['code1']=$item[0];
  unset($item[0]);
  $item['code2']=$item[1];
  unset($item[1]);
  $item['name']=$item[2];
  unset($item[2]);
  $array[$key]=$item;
}

answered Apr 23 '15 at 15:57

Eugen Rieck

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score 0 · Answer 3 · answered Apr 23 '15 at 16:00

0

I would use array_map() but here's an alternate:

foreach($array as &$v) {
    $v = array_combine(array('code1','code2','name'), $v);
}

answered Apr 23 '15 at 16:00

AbraCadaver

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adding string keys to inner arrays

3 Answers3