What are the best practices for efficiently summing specific values in PHP arrays?

When summing specific values in PHP arrays, it is best to use a loop to iterate through the array and add up the desired values. By using a loop, you can target specific keys or conditions to determine which values to include in the sum. This approach allows for flexibility and efficiency when calculating the total sum of specific values in an array. 

// Example array
$array = [10, 20, 30, 40, 50];

// Summing specific values (e.g. values at even indexes)
$sum = 0;
for($i = 0; $i < count($array); $i++) {
    if($i % 2 == 0) {
        $sum += $array[$i];
    }
}

echo $sum; // Output: 90 (10 + 30 + 50)

Keywords

array_sum array_filter array_reduce foreach loop array_map

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