How can the use of absolute paths or relative paths affect the functionality of PHP functions like filesize()?

Using absolute paths or relative paths can affect the functionality of PHP functions like filesize() because they determine the location from which the function will retrieve the file size. Absolute paths specify the exact location of the file on the server, while relative paths specify the location relative to the current working directory. It is recommended to use absolute paths to ensure that the function can accurately locate the file and retrieve its size.

$file = '/path/to/your/file.txt'; // Absolute path to the file
$filesize = filesize($file);
echo "File size: " . $filesize . " bytes";