protected static function get_backups_to_delete($backupfiles, $now) {
        $config = get_config('backup');
        $maxkept = (int)$config->backup_auto_max_kept;
        $deletedays = (int)$config->backup_auto_delete_days;
        $minkept = (int)$config->backup_auto_min_kept;

        // Sort by keys descending (newer to older filemodified).
        krsort($backupfiles);
        $tokeep = $maxkept;
        if ($deletedays > 0) {
            $deletedayssecs = $deletedays * DAYSECS;
            $tokeep = 0;
            $backupfileskeys = array_keys($backupfiles);
            foreach ($backupfileskeys as $timemodified) {
                $mustdeletebackup = $timemodified < ($now - $deletedayssecs);
                if ($mustdeletebackup || $tokeep >= $maxkept) {
                    break;
                }
                $tokeep++;
            }

            if ($tokeep < $minkept) {
                $tokeep = $minkept;
            }
        }

        if (count($backupfiles) <= $tokeep) {
            // There are less or equal matching files than the desired number to keep, there is nothing to clean up.
            return false;
        } else {
            $backupstodelete = array_splice($backupfiles, $tokeep);
            return $backupstodelete;
        }
    }
protected static function get_backups_to_delete($backupfiles, $now) {
        $config = get_config('backup');
        $maxkept = (int)$config->backup_auto_max_kept;
        $deletedays = (int)$config->backup_auto_delete_days;
        $minkept = (int)$config->backup_auto_min_kept;

        // Sort by keys descending (newer to older filemodified).
        krsort($backupfiles);
        $tokeep = $maxkept;
        if ($deletedays > 0) {
            $deletedayssecs = $deletedays * DAYSECS;
            $tokeep = 0;
            $backupfileskeys = array_keys($backupfiles);
            foreach ($backupfileskeys as $timemodified) {
                $mustdeletebackup = $timemodified < ($now - $deletedayssecs);
                if ($mustdeletebackup || $tokeep >= $maxkept) {
                    break;
                }
                $tokeep++;
            }

            if ($tokeep < $minkept) {
                $tokeep = $minkept;
            }
        }

        if (count($backupfiles) <= $tokeep) {
            // There are less or equal matching files than the desired number to keep, there is nothing to clean up.
            return false;
        } else {
            $backupstodelete = array_splice($backupfiles, $tokeep);
            return $backupstodelete;
        }
    }
protected static function get_backups_to_delete ( $ backupfiles , $ now ) { $ config = get_config ( 'backup' ) ; $ maxkept = ( int ) $ config -> backup_auto_max_kept ; $ deletedays = ( int ) $ config -> backup_auto_delete_days ; $ minkept = ( int ) $ config -> backup_auto_min_kept ; // Sort by keys descending (newer to older filemodified). krsort ( $ backupfiles ) ; $ tokeep = $ maxkept ; if ( $ deletedays > 0 ) { $ deletedayssecs = $ deletedays * DAYSECS ; $ tokeep = 0 ; $ backupfileskeys = array_keys ( $ backupfiles ) ; foreach ( $ backupfileskeys as $ timemodified ) { $ mustdeletebackup = $ timemodified < ( $ now - $ deletedayssecs ) ; if ( $ mustdeletebackup || $ tokeep >= $ maxkept ) { break ; } $ tokeep ++ ; } if ( $ tokeep < $ minkept ) { $ tokeep = $ minkept ; } } if ( count ( $ backupfiles ) <= $ tokeep ) { // There are less or equal matching files than the desired number to keep, there is nothing to clean up. return false ; } else { $ backupstodelete = array_splice ( $ backupfiles , $ tokeep ) ; return $ backupstodelete ; } }
Get the list of backup files to delete depending on the automated backup settings.

@param array $backupfiles Existing backup files
@param int $now Starting time of the process
@return array Backup files to delete
Get the list of backup files to delete depending on the automated backup settings .