How can the PHP function be optimized for better performance and readability?

To optimize a PHP function for better performance and readability, you can consider refactoring the code to make it more efficient and easier to understand. This can include breaking down complex logic into smaller, more manageable functions, using built-in PHP functions instead of custom code where possible, and avoiding unnecessary loops or recursive calls.

// Example of optimizing a PHP function for better performance and readability

// Original function
function calculateSum($numbers) {
    $sum = 0;
    foreach ($numbers as $number) {
        $sum += $number;
    }
    return $sum;
}

// Optimized function
function calculateSum($numbers) {
    return array_sum($numbers);
}