What are the potential pitfalls of defining the storage process within a class versus in the processing form in PHP?

Defining the storage process within a class can lead to tightly coupled code, making it difficult to reuse or modify the storage logic. On the other hand, defining the storage process in the processing form can result in code duplication and violate the single responsibility principle. To solve this issue, it's recommended to separate the storage logic into a separate class or function that can be called from both the class and the processing form.

// Separate class for storage logic
class Storage {
    public function storeData($data) {
        // Storage logic here
    }
}

// Implementation in class
class MyClass {
    private $storage;

    public function __construct(Storage $storage) {
        $this->storage = $storage;
    }

    public function processData($data) {
        // Processing logic here
        $this->storage->storeData($data);
    }
}

// Implementation in processing form
$storage = new Storage();
$myClass = new MyClass($storage);
$data = $_POST['data'];
$myClass->processData($data);