How can you ensure efficient memory usage when updating values in PHP?

To ensure efficient memory usage when updating values in PHP, you can unset variables that are no longer needed to free up memory. This can be particularly important when dealing with large arrays or objects that consume a significant amount of memory. By explicitly unsetting variables after they are no longer needed, you can help PHP manage its memory more effectively.

// Example code demonstrating efficient memory usage when updating values in PHP

// Create a large array
$largeArray = range(1, 1000000);

// Update values in the array
foreach ($largeArray as $key => $value) {
    $largeArray[$key] = $value * 2;
}

// Unset the large array to free up memory
unset($largeArray);