<?php function array_subtract(array $input) { $result = reset($input); // First element of the array foreach (array_slice($input, 1) as $value) { // Use array_slice to avoid subtracting the first element twice $result -= $value; // Subtract the value } return $result; // Return the result } $array = ["one" => 50, "two" => 6, 8, 9]; echo array_subtract($array); // Outputs 27
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