How can developers ensure that their offline references for PHP extensions are up-to-date and reliable?

Developers can ensure that their offline references for PHP extensions are up-to-date and reliable by regularly updating their local documentation or downloading the latest version from the official PHP website. They can also verify the accuracy of the information by cross-referencing with online resources or community forums.

// Sample code snippet to update PHP extension documentation
// Download the latest PHP documentation from the official website
// Verify the accuracy of the information by cross-referencing with online resources

// Code snippet goes here