friendica-github/src/Worker/RemoveUser.php

<?php
/**
 * @file src/Worker/RemoveUser.php
 * Removes orphaned data from deleted users
 */
namespace Friendica\Worker;

use Friendica\Database\DBA;
use Friendica\Model\Item;

class RemoveUser {
	public static function execute($uid)
	{
		// Only delete if the user is archived
		$condition = ['account_removed' => true, 'uid' => $uid];
		if (!DBA::exists('user', $condition)) {
			return;
		}

		// Now we delete all user items
		$condition = ['uid' => $uid, 'deleted' => false];
		do {
			$items = Item::select(['id'], $condition, ['limit' => 100]);
			while ($item = Item::fetch($items)) {
				Item::deleteById($item['id'], PRIORITY_NEGLIGIBLE);
			}
			DBA::close($items);
		} while (Item::exists($condition));
	}
}