Sum column values but only if specific key exists in same row - php

Question

I need to sum the price values of all rows where the optional check element exists.
Sample data:
[
6254 => [
'check' => 'on',
'quantity' => 2,
'name' => 'Testing product_special One Size',
'total' => 15.9,
'price' => 33.0000,
'totalken' => 33075.9,
],
6255 => [
'quantity' => 1,
'name' => 'Testing card',
'total' => 113.85,
'price' => 33.0000,
'totalken' => 16537.95,
],
6256 => [
'check' => 'on',
'quantity' => 1,
'name' => 'Testing food',
'total' => 113.85,
'price' => 33.0000,
'totalken' => 16537.95,
],
]
I tried array_sum(array_column($value, 'price')) but this sums all price values regardless of the check value.
Expected result: 66

Answer 1

I would use array_reduce in this case.
array_reduce loops through the array and uses a callback function to reduce array to a single value.
<?php
$totalPrice = array_reduce($myArray, function ($accumulator, $item) {
// I'm checking 'check' key only here, you can test for 'on' value if needed
if (isset($item['check'])) {
$accumulator += $item['price'];
}
return $accumulator;
});

Answer 2

You can simply filter the array based on condition by using array_filter() function of php.
You can see the usage of array_filter() here.
Here is my solution for you if you want to use condition.
$filteredByCheck = array_filter($value, function ($val){
return isset($val['check']);
});
$total = array_sum(array_column($filteredByCheck, 'price'));

Answer 3

The quickest method would be just to loop over the array and maintain a sum, use ?? '' to default it to blank if not set...
$total = 0;
foreach ($value as $element ) {
if ( ($element['check'] ?? '') == "on" ) {
$total += $element['price'];
}
}

Answer 4

#aliirfaan's implementation of array_reduce() can be modernized and compacted as the following snippet.
Code: (Demo)
echo array_reduce(
$array,
fn($result, $row) =>
$result + isset($row['check']) * $row['price']
);
The above uses arrow function syntax which is available since PHP7.4. The mathematics in the return value of the custom function multiplies the price value by the true/false evaluation of isset() on the check column. The boolean value is coerced to an integer automatically when used with arithmetic -- false is zero and true is one. If the coercion is not to your liking, you can explicitly cast the boolean value using (int) immediately before isset().