PHP sum array value based on textual duplicate in another array

问题

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.

回答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,
)

来源：https://stackoverflow.com/questions/64422650/php-sum-array-value-based-on-textual-duplicate-in-another-array

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php

arrays

multidimensional-array