How to add multiple array elements into a transposed structure? - php

Question

I have these arrays
$months = ['jan', 'feb'];
$cashUniform = [2000, 1200];
$cashFee = [24000, 34000];
$cashExpenses = [4000, 300];
Am trying to create an object from these arrays like so:
$data = [{
'month': 'jan',
'cashUniform': 2000,
'cashFee': 24000,
'cashExpenses': 4000,
},
{
'month': 'feb',
'cashUniform': 12000,
'cashFee': 34000,
'cashExpenses': 300,
}
];
I've tried array_combine but it only accepts two array elements, and in my case, I have four array elements.
I've also tried to to create a multiple array.
$data['months'] = $months;
$data['cashFee'] = $cashFee;
$data['cashUniform'] = $cashUniform;
$data['cashExpenses'] = $cashExpenses;
dd(json_encode($data));
The code above returns
{"months":["JAN","FEB"],"cashFee": [12500,2000],"cashUniform":[2000,0],"cashExpenses":[1500,0]}

Answer 1

You can use a simple for loop to loop over all arrays and add the values to a single array:
$data = [];
for ($i = 0; $i < count($months); $i++) {
$data[] = [
'month' => $monts[$i],
'cashUniform' => $cashUniform[$i],
'cashFee' => $cashFee[$i],
'cashExpenses' => $cashExpenses[$i],
];
}
dd($data);
This does require that all arrays have the same amount of values!

Answer 2

$data = [];
foreach ($months as $index => $value) {
$data[] = [
'month' => $monts[$index],
'cashUniform' => $cashUniform[$index],
'cashFee' => $cashFee[$index],
'cashExpenses' => $cashExpenses[$index],
];
}
dd($data);

Answer 3

How about some elegant functional programming so that you don't need to declare a global result array? Transpose the individually declared input data using array_map() -- this synchronously iterates each array. Then name the custom function's parameters to align with the desired keys in the output's subarrays. Use compact() to avoid manually re-writing the keys and variables in the return line.
Code: (Demo)
$months = ['jan', 'feb'];
$cashUniform = [2000, 1200];
$cashFee = [24000, 34000];
$cashExpenses = [4000, 300];
var_export(
array_map(
function ($month, $cashUniform, $cashFee, $cashExpenses) {
return compact(['month', 'cashUniform', 'cashFee', 'cashExpenses']);
},
$months,
$cashUniform,
$cashFee,
$cashExpenses
)
);
Output:
array (
0 =>
array (
'month' => 'jan',
'cashUniform' => 2000,
'cashFee' => 24000,
'cashExpenses' => 4000,
),
1 =>
array (
'month' => 'feb',
'cashUniform' => 1200,
'cashFee' => 34000,
'cashExpenses' => 300,
),
)