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In what scenarios is it advisable to use recursion in PHP array manipulation and what are the potential benefits or drawbacks?

Recursion is advisable in PHP array manipulation when dealing with nested arrays or multi-dimensional arrays. It can be used to traverse through all levels of the array, making it easier to perform operations on each element. Recursion can simplify complex array manipulation tasks and reduce the amount of code needed to achieve the desired outcome. However, it is important to be cautious with recursion as it can lead to stack overflow errors if not implemented correctly.

php 
function flattenArray($array) {
    $result = [];
    
    foreach ($array as $element) {
        if (is_array($element)) {
            $result = array_merge($result, flattenArray($element));
        } else {
            $result[] = $element;
        }
    }
    
    return $result;
}

$array = [1, [2, 3], [4, [5, 6]]];
$flattenedArray = flattenArray($array);

print_r($flattenedArray);

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