Simple command-line tool to print the total file size of files, newer than a given date.

du-for-files-newer-than.php

#!/usr/bin/php
<?

if ($argc < 3) {
	error_log("Usage:\n\t" . __FILE__ . " newer-than-date path [path [path...]]");
	exit(1);
}

$accumulated_size_in_bytes = 0;
$newer_than_timestamp = strtotime($argv[1]);

echo "Looking for files, newer than " . date('Y-m-d H:i:s', $newer_than_timestamp) . "...\n";
for ($i = 2; $i < $argc; $i++) {
	$accumulated_size_in_bytes += accumulate_file_size_for(rtrim($argv[$i], '/'), $newer_than_timestamp);
}

// produce a more human-friendly version of the file size (which is in bytes)
$human_readable_size = $accumulated_size_in_bytes;
foreach (array('B', 'K', 'M', 'G', 'T') as $type) {
	if ($human_readable_size < 1024) {
		$human_readable_size = round($human_readable_size, 2) . $type;
		break;
	}
	$human_readable_size /= 1024.0;
}

echo "Size: $accumulated_size_in_bytes ($human_readable_size)\n";

function accumulate_file_size_for($path = '.', $newer_than_timestamp) {
	$accumulated_size_in_bytes = 0;
	if (is_dir($path)) {
		$dh = opendir($path);
		if ($dh !== false) {
			while (($f = readdir($dh)) !== false) {
				if ($f == '.' || $f == '..') continue;
				$p = $path . '/' . $f;
				$accumulated_size_in_bytes += accumulate_file_size_for($p, $newer_than_timestamp);
			}
			closedir($dh);
		}
	} else {
		if (filemtime($path) >= $newer_than_timestamp) {
			$accumulated_size_in_bytes += filesize($path);
		}
	}
	return $accumulated_size_in_bytes;
}

?>