How does the choice between Variante 1 and Variante 2 impact the efficiency and effectiveness of data manipulation in PHP?

When choosing between Variante 1 and Variante 2 for data manipulation in PHP, the decision can impact the efficiency and effectiveness of the code. Variante 1 may be more concise and easier to read, but Variante 2 could be more efficient in terms of performance due to its direct manipulation of the array keys. It's essential to consider the trade-offs between readability and performance when deciding which approach to use.

// Variante 1
$data = [1, 2, 3, 4, 5];
foreach($data as $key => $value) {
    $data[$key] = $value * 2;
}

// Variante 2
$data = [1, 2, 3, 4, 5];
foreach(array_keys($data) as $key) {
    $data[$key] *= 2;
}