Write a PHP program to get the size of a file

<?php
$myfile = fopen("/home/students/ppp.txt", "w") or die("Unable to open file!");
$txt = "PHP Exercises\n";
fwrite($myfile, $txt);
$txt = "from\n";
fwrite($myfile, $txt);
$txt = "w3resource\n";
fwrite($myfile, $txt);
fclose($myfile);
echo "Size of the file: ".filesize("/home/students/ppp.txt")."\n";
?>