How can recursion be implemented effectively when dealing with arrays in PHP?

When dealing with arrays in PHP, recursion can be implemented effectively by creating a function that calls itself to traverse nested arrays. This allows for processing of arrays with unknown depth or structure without the need for multiple nested loops. 

function processArray($array) {
    foreach ($array as $element) {
        if (is_array($element)) {
            processArray($element);
        } else {
            // Process individual elements here
            echo $element . "\n";
        }
    }
}

// Example usage
$array = [1, 2, [3, 4, [5, 6]], 7];
processArray($array);

Keywords

recursion arrays PHP implementation efficiency

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