array one format to another - php

Question

I have one array in two format. I want to change array from
Array
(
[step_number] => 4
[app_id] => Array
(
[0] => 2
[1] => 3
)
[formdata] => Array
(
[0] => Array
(
[name] => app_id[]
[value] => 2
)
[1] => Array
(
[name] => app_id[]
[value] => 3
)
[2] => Array
(
[name] => fieldval[2][2][]
[value] => 1
)
[3] => Array
(
[name] => fieldval[3][3][]
[value] => 200
)
[4] => Array
(
[name] => fieldval[3][3][]
[value] => day
)
[5] => Array
(
[name] => title
[value] => new plan
)
[6] => Array
(
[name] => feature_plan
[value] => 3
)
[7] => Array
(
[name] => plan_type
[value] => free
)
[8] => Array
(
[name] => price
[value] =>
)
[9] => Array
(
[name] => sell_type
[value] => us
)
)
)
this format to
Array
(
[app_id] => Array
(
[0] => 2
[1] => 3
)
[fieldval] => Array
(
[2] => Array
(
[2] => Array
(
[0] => 1
)
)
[3] => Array
(
[3] => Array
(
[0] => 200
[1] => day
)
)
)
[title] => new plan
[feature_plan] => 3
[plan_type] => free
[price] =>
[sell_type] => us
)
these are are one array into two format. i have data in to first array format and i want to change that format to second array type format.
please tell me how i am trying this for 2 days but not succeed.

Answer 1

Here is a function you could use to produce that conversion:
function convert_formdata($input) {
$output = array();
foreach($input['formdata'] as $data) {
$keys = preg_split("#[\[\]]+#", $data['name']);
$value = $data['value'];
$target = &$output;
foreach($keys as $key) {
// Get index for "[]" reference
if ($key == '') $key = count($target);
// Create the key in the parent array if not there yet
if (!isset($target[$key])) $target[$key] = array();
// Move pointer one level down the hierarchy
$target = &$target[$key];
}
// Write the value at the pointer location
$target = $value;
}
return $output;
}
You would call it like this:
$output = convert_formdata($input);
See it run on eval.in for the given input. The output is:
array (
'app_id' =>
array (
0 => 2,
1 => 3,
),
'fieldval' =>
array (
2 =>
array (
2 =>
array (
0 => 1,
),
),
3 =>
array (
3 =>
array (
0 => 200,
1 => 'day',
),
),
),
'title' => 'new plan,',
'feature_plan' => 3,
'plan_type' => 'free',
'price' => NULL,
'sell_type' => 'us',
)