How can PHP developers ensure that their code remains understandable and maintainable for future modifications by using descriptive variable names?

Descriptive variable names can greatly improve the readability and maintainability of PHP code. By using clear and meaningful names, developers can easily understand the purpose of each variable and make future modifications more efficiently. To ensure code remains understandable, developers should choose variable names that accurately reflect the data they represent.

// Example of using descriptive variable names
$customerName = "John Doe";
$orderId = 12345;
$shippingAddress = "123 Main St";
$totalAmount = 100.00;