Can you explain the difference between getlastmod and filemtime functions in PHP?

The main difference between getlastmod and filemtime functions in PHP is that getlastmod retrieves the last modified time of the current script file, while filemtime retrieves the last modified time of a specified file. If you need to get the last modified time of the current script file, use getlastmod. If you need to get the last modified time of a specific file, use filemtime.

// Example using getlastmod to get last modified time of current script file
$lastModified = getlastmod();
echo "Last modified time of current script file: " . date("Y-m-d H:i:s", $lastModified);

// Example using filemtime to get last modified time of a specific file
$filePath = "example.txt";
$lastModified = filemtime($filePath);
echo "Last modified time of $filePath: " . date("Y-m-d H:i:s", $lastModified);