In what scenarios might specifying the folder path be necessary when using file functions like filesize() in PHP?

When using file functions like filesize() in PHP, specifying the folder path might be necessary when the file you are trying to access is not in the same directory as your PHP script. This is because PHP will look for the file relative to the current working directory of the script. By specifying the folder path, you can ensure that PHP looks for the file in the correct location.

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