How can PHP developers effectively convert a multidimensional array into a single-dimensional array while maintaining the desired data structure and content?

When converting a multidimensional array into a single-dimensional array, PHP developers can use a recursive function to iterate through each element of the array. By checking if each element is an array, developers can flatten the structure by merging the subarrays into the main array. This process ensures that the desired data structure and content are maintained in the resulting single-dimensional array.

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

$multidimensionalArray = [
    1,
    [2, 3],
    [4, [5, 6]],
    7
];

$singleDimensionalArray = flattenArray($multidimensionalArray);

print_r($singleDimensionalArray);