In php is there a function like array_column for multidimensional arrays
Is there function that works similar to array_column for multidimensional arrays? Is there a function that translates the first array below to the second:
Array
(
[0] => Array
(
[foodType] => fruits
[itemID] => 1
[itemName] => apple
)
[1] => Array
(
[foodType] => fruits
[itemID] => 2
[itemName] => banana
)
[2] => Array
(
[foodType] => veggies
[itemID] => 3
[itemName] => carrot
)
[3] => Array
(
[foodType] => veggies
[itemID] => 4
[itemName] => broccoli
)
)
Resulting array:
Array
(
[fruits] => Array
(
[0] => Array
(
[itemID] => 1
[itemName] => apple
)
[1] => Array
(
[itemID] => 2
[itemName] => banana
)
)
[veggies] => Array
(
[0] => Array
(
[itemID] => 3
[itemName] => carrot
)
[1] => Array
(
[itemID] => 4
[itemName] => broccoli
)
)
)
Answer
No, there is not a function to get your expected output natively, though you can make your own functions, just use array_column to get the types/column, and then loop over your array, on match remove the item as to not duplicate iterations.
Something like:
<?php
$data = [
['foodType' => 'fruits', 'itemID' => 1, 'itemName' => 'apple'],
['foodType' => 'fruits', 'itemID' => 2, 'itemName' => 'banana'],
['foodType' => 'veggies', 'itemID' => 3, 'itemName' => 'carrot'],
['foodType' => 'veggies', 'itemID' => 4, 'itemName' => 'broccoli']
];
function array_column_multi ($array, $column) {
$types = array_unique(array_column($array, $column));
$return = [];
foreach ($types as $type) {
foreach ($array as $key => $value) {
if ($type === $value[$column]) {
unset($value[$column]);
$return[$type][] = $value;
unset($array[$key]);
}
}
}
return $return;
}
print_r(array_column_multi($data, 'foodType'));
Result:
Array
(
[fruits] => Array
(
[0] => Array
(
[itemID] => 1
[itemName] => apple
)
[1] => Array
(
[itemID] => 2
[itemName] => banana
)
)
[veggies] => Array
(
[0] => Array
(
[itemID] => 3
[itemName] => carrot
)
[1] => Array
(
[itemID] => 4
[itemName] => broccoli
)
)
)