wordpress clean up uploads folder (scan files and check in the DB/media-library then delete unmapped ones)

cleanup.php

<?php

require(__DIR__ . '/../wp-load.php');
if (!function_exists('wp')) die('Sorry, looks like WordPress isn\'t loaded.');

$dry_run = true;
$move_files_to_trash_folder = true;
$trash_folder_path = realpath(__DIR__ . '/..') . '/unmapped-uploads-to-delete';
if ($move_files_to_trash_folder && !file_exists($trash_folder_path)) mkdir($trash_folder_path);

$query_images_args = array(
	'post_type'      => 'attachment',
	'post_mime_type' => 'image',
	'post_status'    => 'inherit',
	'posts_per_page' => -1,
);

$query_images = new WP_Query( $query_images_args );

$media_library = array();
foreach ($query_images->posts as $image) {
	$file = strstr(wp_get_attachment_url( $image->ID ), 'wp-content');
	$file = trim(strrev(strstr(strrev($file), '.')), '.');
	if ($file) $media_library[] = $file;
}

// var_dump($media_library); exit;

function getFilesArray($path) {
	return array_diff(scandir($path), array('.', '..'));
}

function checkFileExistsInMediaLibrary($path) {
	$files = getFilesArray($path);
	foreach ($files as $filename) {
		$filepath = realpath($path . '/' . $filename);
		if (substr(strstr($filepath, 'wp-content'), 0, 21) !== 'wp-content/uploads/20') continue;
		if (is_dir($filepath)) {
			checkFileExistsInMediaLibrary($filepath);
		}
		else {
			$filesearch = strstr($filepath, 'wp-content'); // just the relative path
			$filesearch = trim(strrev(strstr(strrev($filesearch), '.')), '.'); // lose extension
			$filesearch = preg_replace('/-[0-9]{2,4}x[0-9]{2,4}$/', '', $filesearch);
			if (!in_array($filesearch, $GLOBALS['media_library'])) {
				if ($GLOBALS['dry_run']) {
					print $filepath . " not found! (dry run)\n";
				}
				else if ($GLOBALS['move_files_to_trash_folder']) {
					$target_path = $GLOBALS['trash_folder_path'] . '/' . basename($filepath);
					if (rename($filepath, $target_path)) {
						print $filepath . " not found and moved to trash folder!\n";
					}
					else {
						print $filepath . " COULD NOT BE MOVED TO TRASH!\n";
					}
				}
				else {
					if (unlink($filepath)) {
						print $filepath . " not found and deleted!\n";
					}
					else {
						print $filepath . " COULD NOT BE DELETED!\n";
					}
				}
			}
		}
	}
}

checkFileExistsInMediaLibrary(__DIR__ . '/../wp-content/uploads/');