diff --git a/include/dbclean.php b/include/dbclean.php
deleted file mode 100644
index 1e1dd90829..0000000000
--- a/include/dbclean.php
+++ /dev/null
@@ -1,303 +0,0 @@
-<?php
-/**
- * @file include/dbclean.php
- * @brief The script is called from time to time to clean the database entries and remove orphaned data.
- */
-
-use Friendica\Core\Config;
-use Friendica\Core\Worker;
-
-function dbclean_run(&$argv, &$argc) {
-	if (!Config::get('system', 'dbclean', false)) {
-		return;
-	}
-
-	if ($argc == 2) {
-		$stage = intval($argv[1]);
-	} else {
-		$stage = 0;
-	}
-
-	// Get the expire days for step 8 and 9
-	$days = Config::get('system', 'dbclean-expire-days', 0);
-
-	if ($stage == 0) {
-		for ($i = 1; $i <= 9; $i++) {
-			// Execute the background script for a step when it isn't finished.
-			// Execute step 8 and 9 only when $days is defined.
-			if (!Config::get('system', 'finished-dbclean-'.$i, false) && (($i < 8) || ($days > 0))) {
-				Worker::add(PRIORITY_LOW, 'dbclean', $i);
-			}
-		}
-	} else {
-		remove_orphans($stage);
-	}
-}
-
-/**
- * @brief Remove orphaned database entries
- * @param integer $stage What should be deleted?
- *
- * Values for $stage:
- * ------------------
- * 1:	Old global item entries from item table without user copy.
- * 2:	Items without parents.
- * 3:	Orphaned data from thread table.
- * 4:	Orphaned data from notify table.
- * 5:	Orphaned data from notify-threads table.
- * 6:	Orphaned data from sign table.
- * 7:	Orphaned data from term table.
- * 8:	Expired threads.
- * 9:	Old global item entries from expired threads
- */
-function remove_orphans($stage = 0) {
-	global $db;
-
-	$count = 0;
-
-	// We split the deletion in many small tasks
-	$limit = 1000;
-
-	// Get the expire days for step 8 and 9
-	$days = Config::get('system', 'dbclean-expire-days', 0);
-
-	if ($stage == 1) {
-		$last_id = Config::get('system', 'dbclean-last-id-1', 0);
-
-		logger("Deleting old global item entries from item table without user copy. Last ID: ".$last_id);
-		$r = dba::p("SELECT `id` FROM `item` WHERE `uid` = 0 AND
-					NOT EXISTS (SELECT `guid` FROM `item` AS `i` WHERE `item`.`guid` = `i`.`guid` AND `i`.`uid` != 0) AND
-					`received` < UTC_TIMESTAMP() - INTERVAL 90 DAY AND `id` >= ?
-				ORDER BY `id` LIMIT ".intval($limit), $last_id);
-		$count = dba::num_rows($r);
-		if ($count > 0) {
-			logger("found global item orphans: ".$count);
-			while ($orphan = dba::fetch($r)) {
-				$last_id = $orphan["id"];
-				dba::delete('item', array('id' => $orphan["id"]));
-			}
-		} else {
-			logger("No global item orphans found");
-		}
-		dba::close($r);
-		logger("Done deleting ".$count." old global item entries from item table without user copy. Last ID: ".$last_id);
-
-		Config::set('system', 'dbclean-last-id-1', $last_id);
-	} elseif ($stage == 2) {
-		$last_id = Config::get('system', 'dbclean-last-id-2', 0);
-
-		logger("Deleting items without parents. Last ID: ".$last_id);
-		$r = dba::p("SELECT `id` FROM `item`
-				WHERE NOT EXISTS (SELECT `id` FROM `item` AS `i` WHERE `item`.`parent` = `i`.`id`)
-				AND `id` >= ? ORDER BY `id` LIMIT ".intval($limit), $last_id);
-		$count = dba::num_rows($r);
-		if ($count > 0) {
-			logger("found item orphans without parents: ".$count);
-			while ($orphan = dba::fetch($r)) {
-				$last_id = $orphan["id"];
-				dba::delete('item', array('id' => $orphan["id"]));
-			}
-		} else {
-			logger("No item orphans without parents found");
-		}
-		dba::close($r);
-		logger("Done deleting ".$count." items without parents. Last ID: ".$last_id);
-
-		Config::set('system', 'dbclean-last-id-2', $last_id);
-
-		if ($count < $limit) {
-			Config::set('system', 'finished-dbclean-2', true);
-		}
-	} elseif ($stage == 3) {
-		$last_id = Config::get('system', 'dbclean-last-id-3', 0);
-
-		logger("Deleting orphaned data from thread table. Last ID: ".$last_id);
-		$r = dba::p("SELECT `iid` FROM `thread`
-				WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`parent` = `thread`.`iid`) AND `iid` >= ?
-				ORDER BY `iid` LIMIT ".intval($limit), $last_id);
-		$count = dba::num_rows($r);
-		if ($count > 0) {
-			logger("found thread orphans: ".$count);
-			while ($orphan = dba::fetch($r)) {
-				$last_id = $orphan["iid"];
-				dba::delete('thread', array('iid' => $orphan["iid"]));
-			}
-		} else {
-			logger("No thread orphans found");
-		}
-		dba::close($r);
-		logger("Done deleting ".$count." orphaned data from thread table. Last ID: ".$last_id);
-
-		Config::set('system', 'dbclean-last-id-3', $last_id);
-
-		if ($count < $limit) {
-			Config::set('system', 'finished-dbclean-3', true);
-		}
-	} elseif ($stage == 4) {
-		$last_id = Config::get('system', 'dbclean-last-id-4', 0);
-
-		logger("Deleting orphaned data from notify table. Last ID: ".$last_id);
-		$r = dba::p("SELECT `iid`, `id` FROM `notify`
-				WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `notify`.`iid`) AND `id` >= ?
-				ORDER BY `id` LIMIT ".intval($limit), $last_id);
-		$count = dba::num_rows($r);
-		if ($count > 0) {
-			logger("found notify orphans: ".$count);
-			while ($orphan = dba::fetch($r)) {
-				$last_id = $orphan["id"];
-				dba::delete('notify', array('iid' => $orphan["iid"]));
-			}
-		} else {
-			logger("No notify orphans found");
-		}
-		dba::close($r);
-		logger("Done deleting ".$count." orphaned data from notify table. Last ID: ".$last_id);
-
-		Config::set('system', 'dbclean-last-id-4', $last_id);
-
-		if ($count < $limit) {
-			Config::set('system', 'finished-dbclean-4', true);
-		}
-	} elseif ($stage == 5) {
-		$last_id = Config::get('system', 'dbclean-last-id-5', 0);
-
-		logger("Deleting orphaned data from notify-threads table. Last ID: ".$last_id);
-		$r = dba::p("SELECT `id` FROM `notify-threads`
-				WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`parent` = `notify-threads`.`master-parent-item`) AND `id` >= ?
-				ORDER BY `id` LIMIT ".intval($limit), $last_id);
-		$count = dba::num_rows($r);
-		if ($count > 0) {
-			logger("found notify-threads orphans: ".$count);
-			while ($orphan = dba::fetch($r)) {
-				$last_id = $orphan["id"];
-				dba::delete('notify-threads', array('id' => $orphan["id"]));
-			}
-		} else {
-			logger("No notify-threads orphans found");
-		}
-		dba::close($r);
-		logger("Done deleting ".$count." orphaned data from notify-threads table. Last ID: ".$last_id);
-
-		Config::set('system', 'dbclean-last-id-5', $last_id);
-
-		if ($count < $limit) {
-			Config::set('system', 'finished-dbclean-5', true);
-		}
-	} elseif ($stage == 6) {
-		$last_id = Config::get('system', 'dbclean-last-id-6', 0);
-
-		logger("Deleting orphaned data from sign table. Last ID: ".$last_id);
-		$r = dba::p("SELECT `iid`, `id` FROM `sign`
-				WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `sign`.`iid`) AND `id` >= ?
-				ORDER BY `id` LIMIT ".intval($limit), $last_id);
-		$count = dba::num_rows($r);
-		if ($count > 0) {
-			logger("found sign orphans: ".$count);
-			while ($orphan = dba::fetch($r)) {
-				$last_id = $orphan["id"];
-				dba::delete('sign', array('iid' => $orphan["iid"]));
-			}
-		} else {
-			logger("No sign orphans found");
-		}
-		dba::close($r);
-		logger("Done deleting ".$count." orphaned data from sign table. Last ID: ".$last_id);
-
-		Config::set('system', 'dbclean-last-id-6', $last_id);
-
-		if ($count < $limit) {
-			Config::set('system', 'finished-dbclean-6', true);
-		}
-	} elseif ($stage == 7) {
-		$last_id = Config::get('system', 'dbclean-last-id-7', 0);
-
-		logger("Deleting orphaned data from term table. Last ID: ".$last_id);
-		$r = dba::p("SELECT `oid`, `tid` FROM `term`
-				WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `term`.`oid`) AND `tid` >= ?
-				ORDER BY `tid` LIMIT ".intval($limit), $last_id);
-		$count = dba::num_rows($r);
-		if ($count > 0) {
-			logger("found term orphans: ".$count);
-			while ($orphan = dba::fetch($r)) {
-				$last_id = $orphan["tid"];
-				dba::delete('term', array('oid' => $orphan["oid"]));
-			}
-		} else {
-			logger("No term orphans found");
-		}
-		dba::close($r);
-		logger("Done deleting ".$count." orphaned data from term table. Last ID: ".$last_id);
-
-		Config::set('system', 'dbclean-last-id-7', $last_id);
-
-		if ($count < $limit) {
-			Config::set('system', 'finished-dbclean-7', true);
-		}
-	} elseif ($stage == 8) {
-		if ($days <= 0) {
-			return;
-		}
-
-		$last_id = Config::get('system', 'dbclean-last-id-8', 0);
-
-		logger("Deleting expired threads. Last ID: ".$last_id);
-		$r = dba::p("SELECT `thread`.`iid` FROM `thread`
-                                INNER JOIN `contact` ON `thread`.`contact-id` = `contact`.`id` AND NOT `notify_new_posts`
-                                WHERE `thread`.`received` < UTC_TIMESTAMP() - INTERVAL ? DAY
-                                        AND NOT `thread`.`mention` AND NOT `thread`.`starred`
-                                        AND NOT `thread`.`wall` AND NOT `thread`.`origin`
-                                        AND `thread`.`uid` != 0 AND `thread`.`iid` >= ?
-                                        AND NOT `thread`.`iid` IN (SELECT `parent` FROM `item`
-                                                        WHERE (`item`.`starred` OR (`item`.`resource-id` != '')
-                                                                OR (`item`.`file` != '') OR (`item`.`event-id` != '')
-                                                                OR (`item`.`attach` != '') OR `item`.`wall` OR `item`.`origin`)
-                                                                AND `item`.`parent` = `thread`.`iid`)
-                                ORDER BY `thread`.`iid` LIMIT 1000", $days, $last_id);
-		$count = dba::num_rows($r);
-		if ($count > 0) {
-			logger("found expired threads: ".$count);
-			while ($thread = dba::fetch($r)) {
-				$last_id = $thread["iid"];
-				dba::delete('thread', array('iid' => $thread["iid"]));
-			}
-		} else {
-			logger("No expired threads found");
-		}
-		dba::close($r);
-		logger("Done deleting ".$count." expired threads. Last ID: ".$last_id);
-
-		Config::set('system', 'dbclean-last-id-8', $last_id);
-	} elseif ($stage == 9) {
-		if ($days <= 0) {
-			return;
-		}
-
-		$last_id = Config::get('system', 'dbclean-last-id-9', 0);
-		$till_id = Config::get('system', 'dbclean-last-id-8', 0);
-
-		logger("Deleting old global item entries from expired threads from ID ".$last_id." to ID ".$till_id);
-		$r = dba::p("SELECT `id` FROM `item` WHERE `uid` = 0 AND
-					NOT EXISTS (SELECT `guid` FROM `item` AS `i` WHERE `item`.`guid` = `i`.`guid` AND `i`.`uid` != 0) AND
-					`received` < UTC_TIMESTAMP() - INTERVAL 90 DAY AND `id` >= ? AND `id` <= ?
-				ORDER BY `id` LIMIT ".intval($limit), $last_id, $till_id);
-		$count = dba::num_rows($r);
-		if ($count > 0) {
-			logger("found global item entries from expired threads: ".$count);
-			while ($orphan = dba::fetch($r)) {
-				$last_id = $orphan["id"];
-				dba::delete('item', array('id' => $orphan["id"]));
-			}
-		} else {
-			logger("No global item entries from expired threads");
-		}
-		dba::close($r);
-		logger("Done deleting ".$count." old global item entries from expired threads. Last ID: ".$last_id);
-
-		Config::set('system', 'dbclean-last-id-9', $last_id);
-	}
-
-	// Call it again if not all entries were purged
-	if (($stage != 0) && ($count > 0)) {
-		Worker::add(PRIORITY_MEDIUM, 'dbclean');
-	}
-}
diff --git a/src/Worker/Cron.php b/src/Worker/Cron.php
index 810dca681f..7b6e2ede14 100644
--- a/src/Worker/Cron.php
+++ b/src/Worker/Cron.php
@@ -78,7 +78,7 @@ Class Cron {
 
 			Worker::add(PRIORITY_LOW, 'expire');
 
-			Worker::add(PRIORITY_MEDIUM, 'dbclean');
+			Worker::add(PRIORITY_MEDIUM, 'DBClean');
 
 			Worker::add(PRIORITY_LOW, "cronjobs", "update_photo_albums");
 
diff --git a/src/Worker/DBClean.php b/src/Worker/DBClean.php
new file mode 100644
index 0000000000..94295b053e
--- /dev/null
+++ b/src/Worker/DBClean.php
@@ -0,0 +1,301 @@
+<?php
+/**
+ * @file src/Worker/DBClean.php
+ * @brief The script is called from time to time to clean the database entries and remove orphaned data.
+ */
+
+use Friendica\Core\Config;
+use Friendica\Core\Worker;
+use dba;
+
+class DBClean {
+	public static function execute($stage = 0) {
+
+		if (!Config::get('system', 'dbclean', false)) {
+			return;
+		}
+
+		// Get the expire days for step 8 and 9
+		$days = Config::get('system', 'dbclean-expire-days', 0);
+
+		if ($stage == 0) {
+			for ($i = 1; $i <= 9; $i++) {
+				// Execute the background script for a step when it isn't finished.
+				// Execute step 8 and 9 only when $days is defined.
+				if (!Config::get('system', 'finished-dbclean-'.$i, false) && (($i < 8) || ($days > 0))) {
+					Worker::add(PRIORITY_LOW, 'DBClean', $i);
+				}
+			}
+		} else {
+			self::removeOrphans($stage);
+		}
+	}
+
+	/**
+	 * @brief Remove orphaned database entries
+	 * @param integer $stage What should be deleted?
+	 *
+	 * Values for $stage:
+	 * ------------------
+	 * 1:	Old global item entries from item table without user copy.
+	 * 2:	Items without parents.
+	 * 3:	Orphaned data from thread table.
+	 * 4:	Orphaned data from notify table.
+	 * 5:	Orphaned data from notify-threads table.
+	 * 6:	Orphaned data from sign table.
+	 * 7:	Orphaned data from term table.
+	 * 8:	Expired threads.
+	 * 9:	Old global item entries from expired threads
+	 */
+	private static function removeOrphans($stage = 0) {
+		global $db;
+
+		$count = 0;
+
+		// We split the deletion in many small tasks
+		$limit = 1000;
+
+		// Get the expire days for step 8 and 9
+		$days = Config::get('system', 'dbclean-expire-days', 0);
+
+		if ($stage == 1) {
+			$last_id = Config::get('system', 'dbclean-last-id-1', 0);
+
+			logger("Deleting old global item entries from item table without user copy. Last ID: ".$last_id);
+			$r = dba::p("SELECT `id` FROM `item` WHERE `uid` = 0 AND
+						NOT EXISTS (SELECT `guid` FROM `item` AS `i` WHERE `item`.`guid` = `i`.`guid` AND `i`.`uid` != 0) AND
+						`received` < UTC_TIMESTAMP() - INTERVAL 90 DAY AND `id` >= ?
+					ORDER BY `id` LIMIT ".intval($limit), $last_id);
+			$count = dba::num_rows($r);
+			if ($count > 0) {
+				logger("found global item orphans: ".$count);
+				while ($orphan = dba::fetch($r)) {
+					$last_id = $orphan["id"];
+					dba::delete('item', array('id' => $orphan["id"]));
+				}
+			} else {
+				logger("No global item orphans found");
+			}
+			dba::close($r);
+			logger("Done deleting ".$count." old global item entries from item table without user copy. Last ID: ".$last_id);
+
+			Config::set('system', 'dbclean-last-id-1', $last_id);
+		} elseif ($stage == 2) {
+			$last_id = Config::get('system', 'dbclean-last-id-2', 0);
+
+			logger("Deleting items without parents. Last ID: ".$last_id);
+			$r = dba::p("SELECT `id` FROM `item`
+					WHERE NOT EXISTS (SELECT `id` FROM `item` AS `i` WHERE `item`.`parent` = `i`.`id`)
+					AND `id` >= ? ORDER BY `id` LIMIT ".intval($limit), $last_id);
+			$count = dba::num_rows($r);
+			if ($count > 0) {
+				logger("found item orphans without parents: ".$count);
+				while ($orphan = dba::fetch($r)) {
+					$last_id = $orphan["id"];
+					dba::delete('item', array('id' => $orphan["id"]));
+				}
+			} else {
+				logger("No item orphans without parents found");
+			}
+			dba::close($r);
+			logger("Done deleting ".$count." items without parents. Last ID: ".$last_id);
+
+			Config::set('system', 'dbclean-last-id-2', $last_id);
+
+			if ($count < $limit) {
+				Config::set('system', 'finished-dbclean-2', true);
+			}
+		} elseif ($stage == 3) {
+			$last_id = Config::get('system', 'dbclean-last-id-3', 0);
+
+			logger("Deleting orphaned data from thread table. Last ID: ".$last_id);
+			$r = dba::p("SELECT `iid` FROM `thread`
+					WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`parent` = `thread`.`iid`) AND `iid` >= ?
+					ORDER BY `iid` LIMIT ".intval($limit), $last_id);
+			$count = dba::num_rows($r);
+			if ($count > 0) {
+				logger("found thread orphans: ".$count);
+				while ($orphan = dba::fetch($r)) {
+					$last_id = $orphan["iid"];
+					dba::delete('thread', array('iid' => $orphan["iid"]));
+				}
+			} else {
+				logger("No thread orphans found");
+			}
+			dba::close($r);
+			logger("Done deleting ".$count." orphaned data from thread table. Last ID: ".$last_id);
+
+			Config::set('system', 'dbclean-last-id-3', $last_id);
+
+			if ($count < $limit) {
+				Config::set('system', 'finished-dbclean-3', true);
+			}
+		} elseif ($stage == 4) {
+			$last_id = Config::get('system', 'dbclean-last-id-4', 0);
+
+			logger("Deleting orphaned data from notify table. Last ID: ".$last_id);
+			$r = dba::p("SELECT `iid`, `id` FROM `notify`
+					WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `notify`.`iid`) AND `id` >= ?
+					ORDER BY `id` LIMIT ".intval($limit), $last_id);
+			$count = dba::num_rows($r);
+			if ($count > 0) {
+				logger("found notify orphans: ".$count);
+				while ($orphan = dba::fetch($r)) {
+					$last_id = $orphan["id"];
+					dba::delete('notify', array('iid' => $orphan["iid"]));
+				}
+			} else {
+				logger("No notify orphans found");
+			}
+			dba::close($r);
+			logger("Done deleting ".$count." orphaned data from notify table. Last ID: ".$last_id);
+
+			Config::set('system', 'dbclean-last-id-4', $last_id);
+
+			if ($count < $limit) {
+				Config::set('system', 'finished-dbclean-4', true);
+			}
+		} elseif ($stage == 5) {
+			$last_id = Config::get('system', 'dbclean-last-id-5', 0);
+
+			logger("Deleting orphaned data from notify-threads table. Last ID: ".$last_id);
+			$r = dba::p("SELECT `id` FROM `notify-threads`
+					WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`parent` = `notify-threads`.`master-parent-item`) AND `id` >= ?
+					ORDER BY `id` LIMIT ".intval($limit), $last_id);
+			$count = dba::num_rows($r);
+			if ($count > 0) {
+				logger("found notify-threads orphans: ".$count);
+				while ($orphan = dba::fetch($r)) {
+					$last_id = $orphan["id"];
+					dba::delete('notify-threads', array('id' => $orphan["id"]));
+				}
+			} else {
+				logger("No notify-threads orphans found");
+			}
+			dba::close($r);
+			logger("Done deleting ".$count." orphaned data from notify-threads table. Last ID: ".$last_id);
+
+			Config::set('system', 'dbclean-last-id-5', $last_id);
+
+			if ($count < $limit) {
+				Config::set('system', 'finished-dbclean-5', true);
+			}
+		} elseif ($stage == 6) {
+			$last_id = Config::get('system', 'dbclean-last-id-6', 0);
+
+			logger("Deleting orphaned data from sign table. Last ID: ".$last_id);
+			$r = dba::p("SELECT `iid`, `id` FROM `sign`
+					WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `sign`.`iid`) AND `id` >= ?
+					ORDER BY `id` LIMIT ".intval($limit), $last_id);
+			$count = dba::num_rows($r);
+			if ($count > 0) {
+				logger("found sign orphans: ".$count);
+				while ($orphan = dba::fetch($r)) {
+					$last_id = $orphan["id"];
+					dba::delete('sign', array('iid' => $orphan["iid"]));
+				}
+			} else {
+				logger("No sign orphans found");
+			}
+			dba::close($r);
+			logger("Done deleting ".$count." orphaned data from sign table. Last ID: ".$last_id);
+
+			Config::set('system', 'dbclean-last-id-6', $last_id);
+
+			if ($count < $limit) {
+				Config::set('system', 'finished-dbclean-6', true);
+			}
+		} elseif ($stage == 7) {
+			$last_id = Config::get('system', 'dbclean-last-id-7', 0);
+
+			logger("Deleting orphaned data from term table. Last ID: ".$last_id);
+			$r = dba::p("SELECT `oid`, `tid` FROM `term`
+					WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `term`.`oid`) AND `tid` >= ?
+					ORDER BY `tid` LIMIT ".intval($limit), $last_id);
+			$count = dba::num_rows($r);
+			if ($count > 0) {
+				logger("found term orphans: ".$count);
+				while ($orphan = dba::fetch($r)) {
+					$last_id = $orphan["tid"];
+					dba::delete('term', array('oid' => $orphan["oid"]));
+				}
+			} else {
+				logger("No term orphans found");
+			}
+			dba::close($r);
+			logger("Done deleting ".$count." orphaned data from term table. Last ID: ".$last_id);
+
+			Config::set('system', 'dbclean-last-id-7', $last_id);
+
+			if ($count < $limit) {
+				Config::set('system', 'finished-dbclean-7', true);
+			}
+		} elseif ($stage == 8) {
+			if ($days <= 0) {
+				return;
+			}
+
+			$last_id = Config::get('system', 'dbclean-last-id-8', 0);
+
+			logger("Deleting expired threads. Last ID: ".$last_id);
+			$r = dba::p("SELECT `thread`.`iid` FROM `thread`
+	                                INNER JOIN `contact` ON `thread`.`contact-id` = `contact`.`id` AND NOT `notify_new_posts`
+	                                WHERE `thread`.`received` < UTC_TIMESTAMP() - INTERVAL ? DAY
+	                                        AND NOT `thread`.`mention` AND NOT `thread`.`starred`
+	                                        AND NOT `thread`.`wall` AND NOT `thread`.`origin`
+	                                        AND `thread`.`uid` != 0 AND `thread`.`iid` >= ?
+	                                        AND NOT `thread`.`iid` IN (SELECT `parent` FROM `item`
+	                                                        WHERE (`item`.`starred` OR (`item`.`resource-id` != '')
+	                                                                OR (`item`.`file` != '') OR (`item`.`event-id` != '')
+	                                                                OR (`item`.`attach` != '') OR `item`.`wall` OR `item`.`origin`)
+	                                                                AND `item`.`parent` = `thread`.`iid`)
+	                                ORDER BY `thread`.`iid` LIMIT 1000", $days, $last_id);
+			$count = dba::num_rows($r);
+			if ($count > 0) {
+				logger("found expired threads: ".$count);
+				while ($thread = dba::fetch($r)) {
+					$last_id = $thread["iid"];
+					dba::delete('thread', array('iid' => $thread["iid"]));
+				}
+			} else {
+				logger("No expired threads found");
+			}
+			dba::close($r);
+			logger("Done deleting ".$count." expired threads. Last ID: ".$last_id);
+
+			Config::set('system', 'dbclean-last-id-8', $last_id);
+		} elseif ($stage == 9) {
+			if ($days <= 0) {
+				return;
+			}
+
+			$last_id = Config::get('system', 'dbclean-last-id-9', 0);
+			$till_id = Config::get('system', 'dbclean-last-id-8', 0);
+
+			logger("Deleting old global item entries from expired threads from ID ".$last_id." to ID ".$till_id);
+			$r = dba::p("SELECT `id` FROM `item` WHERE `uid` = 0 AND
+						NOT EXISTS (SELECT `guid` FROM `item` AS `i` WHERE `item`.`guid` = `i`.`guid` AND `i`.`uid` != 0) AND
+						`received` < UTC_TIMESTAMP() - INTERVAL 90 DAY AND `id` >= ? AND `id` <= ?
+					ORDER BY `id` LIMIT ".intval($limit), $last_id, $till_id);
+			$count = dba::num_rows($r);
+			if ($count > 0) {
+				logger("found global item entries from expired threads: ".$count);
+				while ($orphan = dba::fetch($r)) {
+					$last_id = $orphan["id"];
+					dba::delete('item', array('id' => $orphan["id"]));
+				}
+			} else {
+				logger("No global item entries from expired threads");
+			}
+			dba::close($r);
+			logger("Done deleting ".$count." old global item entries from expired threads. Last ID: ".$last_id);
+
+			Config::set('system', 'dbclean-last-id-9', $last_id);
+		}
+
+		// Call it again if not all entries were purged
+		if (($stage != 0) && ($count > 0)) {
+			Worker::add(PRIORITY_MEDIUM, 'dbclean');
+		}
+	}
+}