How can PHP developers ensure that their code remains up-to-date and supported by newer versions of PHP?

PHP developers can ensure that their code remains up-to-date and supported by newer versions of PHP by regularly updating their codebase to adhere to the latest PHP standards and best practices. This includes using the latest PHP functions, syntax, and features, as well as keeping track of deprecated functions that may be removed in future versions. Additionally, developers should regularly test their code on different PHP versions to identify any compatibility issues and make necessary adjustments.

// Example code snippet demonstrating how to use the null coalescing operator (??) introduced in PHP 7
// Instead of using the ternary operator (?:) to check for null values, the null coalescing operator provides a more concise and readable alternative

// Using ternary operator
$variable = isset($_GET['param']) ? $_GET['param'] : 'default';

// Using null coalescing operator
$variable = $_GET['param'] ?? 'default';