Determining File Sizes in PHP

The filesize function allows you to find the size of a file in bytes. Example:

php<?php
  echo filesize('test.txt');
?>

The size in bytes can easily be converted to kilobytes:

php<?php
  echo filesize('test.txt') / 1024;
?>

And now let's convert it to megabytes:

php<?php
  echo filesize('test.txt') / (1024 * 1024);
?>

Задание 1

Let there be a file in the root of your site. Find out its size and display it on the screen.

Задание 2

Modify the previous task so that the file size is displayed in kilobytes.

Задание 3

Place some picture larger than a megabyte in the root of your site. Find out the size of this file and convert it to megabytes.

Задание 4

Place some movie larger than a gigabyte in the root of your site. Find out the size of this file and convert it to gigabytes.