Convert PHP "grouped" array to "segmented" array - php

Question

Trying to convert a "grouped" multidimensional array to a "segmented" multidimensional array. Not sure how to explain it exactly so hopefully these print_r results explain it better.
Current Array
Array
(
[qty] => Array
(
[0] => 1
[1] => 1
[2] => 1
)
[item_id] => Array
(
[0] => RR332
[1] => FF586
[2] => QW865
)
[item_name] => Array
(
[0] => Widget 1
[1] => Widget 2
[2] => Widget 3
)
[price] => Array
(
[0] => 1.00
[1] => 1.50
[2] => 1.50
)
)
Wanted Array
Array
(
[0] => Array
(
[qty] => 1
[item_id] => RR332
[item_name] => Widget 1
[price] => 1.00
)
[1] => Array
(
[qty] => 1
[item_id] => FF586
[item_name] => Widget 2
[price] => 1.50
)
[2] => Array
(
[qty] => 1
[item_id] => QW865
[item_name] => Widget 3
[price] => 1.50
)
)
This seems like it should be a simple task but I haven't been able to crack it yet.
I would preferably like to loop through the Current Array to create the Wanted Array if possible.
Any help is greatly appreciated!
Thanks.

Answer 1

You mean this?:
$data = array(
'qty' => array(
0 => 1,
1 => 1,
2 => 1,
),
'item_id' => array(
0 => 'RR332',
1 => 'FF586',
2 => 'QW865',
),
'item_name' => array(
0 => 'Widget 1',
1 => 'Widget 2',
2 => 'Widget 3',
),
'price' => array(
0 => '1.00',
1 => '1.50',
2 => '1.50',
),
);
$result = array();
foreach($data as $key => $values)
{
foreach($values as $number => $value)
$result[$number][$key] = $value;
}
print_r($result);
Output:
Array
(
[0] => Array
(
[qty] => 1
[item_id] => RR332
[item_name] => Widget 1
[price] => 1.00
)
[1] => Array
(
[qty] => 1
[item_id] => FF586
[item_name] => Widget 2
[price] => 1.50
)
[2] => Array
(
[qty] => 1
[item_id] => QW865
[item_name] => Widget 3
[price] => 1.50
)
)

Answer 2

I think this will do the job for you, though I don't have a good data set to test against.
$wanted_array = array();
// Iterate over the outer array to get the text keys & inner arrays
foreach ($current_array as $txtkey=>$arr) {
// Iterate over each inner array to get the numeric key
foreach ($arr as $numkey=>$val) {
// Set a numeric key pointing to a new array
// onto the new outer array if it isn't already there
if (!isset($wanted_array[$numkey])) $wanted_array[$numkey] = array();
// Swap the keys of the outer and inner arrays.
$wanted_array[$numkey][$txtkey] = $val;
}
}
Update: Using test array from #hakre's answer, here it is in practice:
$current_array = array(
'qty' => array(
0 => 1,
1 => 1,
2 => 1
),
'item_id' => array(
0 => 'RR332',
1 => 'FF586',
2 => 'QW865'
),
'item_name' => array(
0 => 'Widget 1',
1 => 'Widget 2',
2 => 'Widget 3'
),
'price' => array(
0 => '1.00',
1 => '1.50',
2 => '1.50'
)
);
// Output:
Array
(
[0] => Array
(
[qty] => 1
[item_id] => RR332
[item_name] => Widget 1
[price] => 1.00
)
[1] => Array
(
[qty] => 1
[item_id] => FF586
[item_name] => Widget 2
[price] => 1.50
)
[2] => Array
(
[qty] => 1
[item_id] => QW865
[item_name] => Widget 3
[price] => 1.50
)
)

Answer 3

Like you said, just loop through it to build it.
$wanted = array();
foreach($current['item_id'] as $key => $value) {
$wanted[$key] = array(
'qty' = $current['qty'][$key],
'item_id' = $current['item_id'][$key],
'item_name' = $current['item_name'][$key],
'price' = $current['price'][$key]
);
}
print_r($wanted);

Answer 4

You can loop over your original array using the foreach loop, which gives you the $key, and $value for each item in your array. From there, construct your new array as you like.
$array2 = array();
foreach ($array1 as $key => $value)
{
$array2[] = array('key' => 'value');
}