Here’s the follow-up article on how to easily get file sizes nicely formated. Below is a quick function that will display the file size in KB, MB, or GB all easily accessed through a function.
function formatbytes($file, $type) { switch($type){ case "KB": $filesize = filesize($file) * .0009765625; // bytes to KB break; case "MB": $filesize = (filesize($file) * .0009765625) * .0009765625; // bytes to MB break; case "GB": $filesize = ((filesize($file) * .0009765625) * .0009765625) * .0009765625; // bytes to GB break; } if($filesize <= 0){ return $filesize = 'unknown file size';} else{return round($filesize, 2).' '.$type;} } // USAGE - would display the file size in MB echo formatbytes("$_SERVER[DOCUMENT_ROOT]/images/large_picture.jpg", "MB"); Just remember the file location has to be the absolute location on the server. It can not be relative ('/images/....')