How can PHP developers optimize their code by separating lengthy switch statements into separate files for better organization and readability?

When dealing with lengthy switch statements in PHP code, developers can improve organization and readability by separating each case into separate files. This can be achieved by creating individual PHP files for each case, then including these files in the main switch statement. This approach helps break down the code into smaller, more manageable chunks, making it easier to maintain and understand.

// Main switch statement in the original PHP file
switch ($variable) {
    case 'case1':
        include 'case1.php';
        break;
    case 'case2':
        include 'case2.php';
        break;
    // Add more cases as needed
}
```

```php
// case1.php
// Code for case 1
```

```php
// case2.php
// Code for case 2