function return_bytes ($val)
Use this function to convert a GB, MB, or KB to bytes. For example if you need to know in bytes of maximum upload filesize (upload_max_filesize) which usually written as: 128M, 1GB, etc.
$val = the size.
Example 1
<?php
require './includes/user_init.php';
$fs = ini_get ('upload_max_filesize');
echo "$fs is ".num_format (return_bytes ($fs))." bytes";
?>
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