How can the PHP script be modified to handle additional levels of recursion effectively?

To handle additional levels of recursion effectively in a PHP script, you can modify the script to include a parameter that tracks the current level of recursion and set a maximum level to prevent infinite recursion. You can also optimize the code by using memoization to store intermediate results and avoid redundant calculations. 

<?php
function recursiveFunction($input, $level = 0, $maxLevel = 10, $memo = []) {
    if ($level > $maxLevel) {
        return "Max recursion level reached";
    }
    
    // Check if result is memoized
    if (isset($memo[$input])) {
        return $memo[$input];
    }
    
    // Base case
    if ($input == 0) {
        return 0;
    }
    
    // Recursive case
    $result = recursiveFunction($input - 1, $level + 1, $maxLevel, $memo) + $input;
    
    // Memoize result
    $memo[$input] = $result;
    
    return $result;
}

// Example usage
$input = 5;
echo recursiveFunction($input);
?>

Keywords

recursion PHP script modification handling additional levels

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