$file = '/path/to/your/file';
$filesize = filesize($file); // bytes
$filesize = round($filesize / 1024 / 1024, 1); // megabytes with 1 digit
echo "The size of your file is $filesize MB.";
$file = '/path/to/your/file';
$filesize = filesize($file); // bytes
$filesize = round($filesize / 1024, 2); // kilobytes with two digits
echo "The size of your file is $filesize KB.";
$file = '/path/to/your/file';
$filesize = filesize($file);
echo "The size of your file is $filesize bytes.";
filesize($filename)