In the PHP code provided for handling form data and storing it in a file, what improvements can be made to ensure proper data serialization and storage?

To ensure proper data serialization and storage in the PHP code, we can use functions like `json_encode()` and `json_decode()` to serialize and deserialize the data respectively. This will help maintain the structure and integrity of the data when storing it in a file.

// Serialize the form data before storing it in a file
$formData = json_encode($_POST);

// Store the serialized data in a file
file_put_contents('form_data.json', $formData);

// To retrieve the data from the file and unserialize it
$storedData = file_get_contents('form_data.json');
$decodedData = json_decode($storedData, true);

// Access the data as an associative array
echo $decodedData['name'];