How to get the size of a file in PHP?

Use the filesize() function. It returns the size of a file in bytes. If the file does not exist, it gives a warning and returns false.

<?php
file_put_contents("sample.txt", "Hello PHP");

echo filesize("sample.txt") . " bytes";
?>

Output:

To show the size in KB, divide it by 1024.

<?php
$kb = filesize("sample.txt") / 1024;

echo round($kb, 2) . " KB";
?>

Output:

PHP remembers the result of filesize() for the same file. If the file changes during the same script, call clearstatcache() first.

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