How do I use the `reduce()` function

The reduce() function in PHP is used to iterate over an array and reduce it to a single value using a callback function. This function applies the callback to each element of the array, carrying over the accumulated result from the previous iteration. It is especially useful for summing up values or concatenating strings.

Example of using `reduce()`


        $numbers = [1, 2, 3, 4, 5];
        
        $sum = array_reduce($numbers, function($carry, $item) {
            return $carry + $item;
        }, 0);
        
        echo $sum; // Outputs: 15