PHP sum array value based on textual duplicate in another array - php

Question

I have two arrays, both will always be the same count length. One has doubles mixed with integers, the second has textual (string only) values. They do correlate so I need them both to stay in order. Sorry no keys to work with (by design).
I need to sum the values where I have duplicates in the array that has strings.
Example
$dataLabelGraph = array(3, 8, 1, 4.85, 1, 0.5, 6.01, 7);
$dataCalcGraph = array("Coding", "Web development - Coding", "Meeting", "Coding", "Coding", "Content", "Coding", "Coding");
So my algorithm should look like this after
$dataLabelGraph = array(21.86, 8, 1, 0.5);
$dataCalcGraph = array("Coding", "Web development - Coding", "Meeting", "Content");
I was trying to adapt this solution, from the awesome brain of Martin D. # https://stackoverflow.com/a/22071693/12835769
$records_array = array("Coding", "Web development - Coding", "Meeting", "Coding", "Coding", "Content", "Coding");
$quantities_array = array(3, 8, 1, 4.85, 1, 0.5, 6.01, 7);
$new_array = array();
foreach ($records_array as $record_position => $new_array_key){
$new_array[$new_array_key] += $quantities_array[$record_position];
}
var_dump($new_array);
Gives something like this, which is close but I need them to remain in two separate arrays
array (size=4)
'Coding' => float 21.86
'Web development - Coding' => int 8
'Meeting' => int 1
'Content' => float 0.5
Any help to get me over the line would be immensely helpful. Kudos.

Answer 1

Group by the "name" and sum as you iterate. When the loop is finished, split the keys and the values into separate arrays.
Code: (Demo)
$records = [
"Coding",
"Web development - Coding",
"Meeting",
"Coding",
"Coding",
"Content",
"Coding",
"Coding"
];
$quantities = [
3,
8,
1,
4.85,
1,
0.5,
6.01,
7
];
$result = [];
foreach ($records as $index => $label){
$result[$label] = ($result[$label] ?? 0) + $quantities[$index];
}
var_export(array_keys($result));
var_export(array_values($result));
Outputs:
array (
0 => 'Coding',
1 => 'Web development - Coding',
2 => 'Meeting',
3 => 'Content',
)
array (
0 => 21.86,
1 => 8,
2 => 1,
3 => 0.5,
)