What are the limitations of using PHP versions below 5.5 when working with generators and yield statements in file filtering tasks?

PHP versions below 5.5 do not support generators and yield statements, which are essential for efficient file filtering tasks. To solve this issue, you can upgrade your PHP version to 5.5 or above to take advantage of these features.

// Upgrade PHP version to 5.5 or above to use generators and yield statements for file filtering tasks