Convert a flat array into an array of associative rows with predefined keys

Question

How can I turn this array:

array(
    0 => Title1,
    1 => Title2,
    3 => Address1,
    4 => Address2,
)

into this array:

array (
    0 => array(
        'title' => 'Title1'
        'address' =>'Address1'
    ),
    1 => array(
        'title' => 'Title2',
        'address' => 'Address2'
    )
);

when you were initially given

$_POST['title'] = array('Title1', 'Title2');
$_POST['address'] = array('Address1', 'Address2');

which when merged would give you the first array I have given

I was able to solve this via a high level Arr:Rotate function in Kohana framework, along with Arr::merge function but I can't quite understand the implementation.

Pascal MARTIN · Accepted Answer · 2010-03-29 04:44:03Z

4

What about something like this :

$_POST['title'] = array('Title1', 'Title2');
$_POST['address'] = array('Address1', 'Address2');

$result = array();
$length = count($_POST['title']);

for ($i=0 ; $i<$length ; $i++) {
    $result[$i]['title'] = $_POST['title'][$i];
    $result[$i]['address'] = $_POST['address'][$i];
}

var_dump($result);

Which gives you the following result :

array
  0 => 
    array
      'title' => string 'Title1' (length=6)
      'address' => string 'Address1' (length=8)
  1 => 
    array
      'title' => string 'Title2' (length=6)
      'address' => string 'Address2' (length=8)

i.e. loop over both the title and address arrays you were initially given, and push their content into a new array -- without merging them or anything.

answered Mar 29, 2010 at 4:44

Pascal MARTIN

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Comments

mickmackusa · Accepted Answer · 2025-01-30 00:42:54Z

0

Chunk, transpose, and assigned predefined keys. Demo

$array = [
      0 => 'Title1',
      1 => 'Title2',
      3 => 'Address1',
      4 => 'Address2',
];
    
var_export(
    array_map(
        fn($title, $address) => get_defined_vars(),
        ...array_chunk($array, 2)
    )
);

or with $_POST data: Demo

var_export(
    array_map(
        fn($title, $address) => get_defined_vars(),
        $_POST['title'],
        $_POST['address']
    )
);

Output (from either):

array (
  0 => 
  array (
    'title' => 'Title1',
    'address' => 'Address1',
  ),
  1 => 
  array (
    'title' => 'Title2',
    'address' => 'Address2',
  ),
)

answered Jan 30 at 0:42

mickmackusa♦

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