PHP backup_delete_old_data函数代码示例

function backup_execute(&$preferences, &$errorstr)
{
    global $CFG;
    $status = true;
    //Check for temp and backup and backup_unique_code directory
    //Create them as needed
    if (!defined('BACKUP_SILENTLY')) {
        echo "<li>" . get_string("creatingtemporarystructures") . '</li>';
    }
    $status = check_and_create_backup_dir($preferences->backup_unique_code);
    //Empty dir
    if ($status) {
        $status = clear_backup_dir($preferences->backup_unique_code);
    }
    //Delete old_entries from backup tables
    if (!defined('BACKUP_SILENTLY')) {
        echo "<li>" . get_string("deletingolddata") . '</li>';
    }
    $status = backup_delete_old_data();
    if (!$status) {
        if (!defined('BACKUP_SILENTLY')) {
            notify("An error occurred deleting old backup data");
        } else {
            $errorstr = "An error occurred deleting old backup data";
            return false;
        }
    }
    //Create the moodle.xml file
    if ($status) {
        if (!defined('BACKUP_SILENTLY')) {
            echo "<li>" . get_string("creatingxmlfile");
            //Begin a new list to xml contents
            echo "<ul>";
            echo "<li>" . get_string("writingheader") . '</li>';
        }
        //Obtain the xml file (create and open) and print prolog information
        $backup_file = backup_open_xml($preferences->backup_unique_code);
        if (!defined('BACKUP_SILENTLY')) {
            echo "<li>" . get_string("writinggeneralinfo") . '</li>';
        }
        //Prints general info about backup to file
        if ($backup_file) {
            if (!($status = backup_general_info($backup_file, $preferences))) {
                if (!defined('BACKUP_SILENTLY')) {
                    notify("An error occurred while backing up general info");
                } else {
                    $errorstr = "An error occurred while backing up general info";
                    return false;
                }
            }
        }
        if (!defined('BACKUP_SILENTLY')) {
            echo "<li>" . get_string("writingcoursedata");
            //Start new ul (for course)
            echo "<ul>";
            echo "<li>" . get_string("courseinfo") . '</li>';
        }
        //Prints course start (tag and general info)
        if ($status) {
            if (!($status = backup_course_start($backup_file, $preferences))) {
                if (!defined('BACKUP_SILENTLY')) {
                    notify("An error occurred while backing up course start");
                } else {
                    $errorstr = "An error occurred while backing up course start";
                    return false;
                }
            }
        }
        //Metacourse information
        if ($status && $preferences->backup_metacourse) {
            if (!defined('BACKUP_SILENTLY')) {
                echo "<li>" . get_string("metacourse") . '</li>';
            }
            if (!($status = backup_course_metacourse($backup_file, $preferences))) {
                if (!defined('BACKUP_SILENTLY')) {
                    notify("An error occurred while backing up metacourse info");
                } else {
                    $errorstr = "An error occurred while backing up metacourse info";
                    return false;
                }
            }
        }
        if (!defined('BACKUP_SILENTLY')) {
            echo "<li>" . get_string("blocks") . '</li>';
        }
        //Blocks information
        if ($status) {
            if (!($status = backup_course_blocks($backup_file, $preferences))) {
                if (!defined('BACKUP_SILENTLY')) {
                    notify("An error occurred while backing up course blocks");
                } else {
                    $errorstr = "An error occurred while backing up course blocks";
                    return false;
                }
            }
        }
        if (!defined('BACKUP_SILENTLY')) {
            echo "<li>" . get_string("sections") . '</li>';
        }
        //Section info
//.........这里部分代码省略.........

/**
 * @param string $errorstr passed by reference, if silent is true,
 * errorstr will be populated and this function will return false rather than calling error() or notify()
 * @param boolean $noredirect (optional) if this is passed, this function will not print continue, or
 * redirect to the next step in the restore process, instead will return $backup_unique_code
 */
function restore_precheck($id, $file, &$errorstr, $noredirect = false)
{
    global $CFG, $SESSION;
    //Prepend dataroot to variable to have the absolute path
    $file = $CFG->dataroot . "/" . $file;
    if (!defined('RESTORE_SILENTLY')) {
        //Start the main table
        echo "<table cellpadding=\"5\">";
        echo "<tr><td>";
        //Start the mail ul
        echo "<ul>";
    }
    //Check the file exists
    if (!is_file($file)) {
        if (!defined('RESTORE_SILENTLY')) {
            error("File not exists ({$file})");
        } else {
            $errorstr = "File not exists ({$file})";
            return false;
        }
    }
    //Check the file name ends with .zip
    if (!substr($file, -4) == ".zip") {
        if (!defined('RESTORE_SILENTLY')) {
            error("File has an incorrect extension");
        } else {
            $errorstr = 'File has an incorrect extension';
            return false;
        }
    }
    //Now calculate the unique_code for this restore
    $backup_unique_code = time();
    //Now check and create the backup dir (if it doesn't exist)
    if (!defined('RESTORE_SILENTLY')) {
        echo "<li>" . get_string("creatingtemporarystructures") . '</li>';
    }
    $status = check_and_create_backup_dir($backup_unique_code);
    //Empty dir
    if ($status) {
        $status = clear_backup_dir($backup_unique_code);
    }
    //Now delete old data and directories under dataroot/temp/backup
    if ($status) {
        if (!defined('RESTORE_SILENTLY')) {
            echo "<li>" . get_string("deletingolddata") . '</li>';
        }
        $status = backup_delete_old_data();
    }
    //Now copy he zip file to dataroot/temp/backup/backup_unique_code
    if ($status) {
        if (!defined('RESTORE_SILENTLY')) {
            echo "<li>" . get_string("copyingzipfile") . '</li>';
        }
        if (!($status = backup_copy_file($file, $CFG->dataroot . "/temp/backup/" . $backup_unique_code . "/" . basename($file)))) {
            if (!defined('RESTORE_SILENTLY')) {
                notify("Error copying backup file. Invalid name or bad perms.");
            } else {
                $errorstr = "Error copying backup file. Invalid name or bad perms";
                return false;
            }
        }
    }
    //Now unzip the file
    if ($status) {
        if (!defined('RESTORE_SILENTLY')) {
            echo "<li>" . get_string("unzippingbackup") . '</li>';
        }
        if (!($status = restore_unzip($CFG->dataroot . "/temp/backup/" . $backup_unique_code . "/" . basename($file)))) {
            if (!defined('RESTORE_SILENTLY')) {
                notify("Error unzipping backup file. Invalid zip file.");
            } else {
                $errorstr = "Error unzipping backup file. Invalid zip file.";
                return false;
            }
        }
    }
    //Check for Blackboard backups and convert
    if ($status) {
        require_once "{$CFG->dirroot}/backup/bb/restore_bb.php";
        if (!defined('RESTORE_SILENTLY')) {
            echo "<li>" . get_string("checkingforbbexport") . '</li>';
        }
        $status = blackboard_convert($CFG->dataroot . "/temp/backup/" . $backup_unique_code);
    }
    //Now check for the moodle.xml file
    if ($status) {
        $xml_file = $CFG->dataroot . "/temp/backup/" . $backup_unique_code . "/moodle.xml";
        if (!defined('RESTORE_SILENTLY')) {
            echo "<li>" . get_string("checkingbackup") . '</li>';
        }
        if (!($status = restore_check_moodle_file($xml_file))) {
            if (!is_file($xml_file)) {
                $errorstr = 'Error checking backup file. moodle.xml not found at root level of zip file.';
            } else {
//.........这里部分代码省略.........

function schedule_backup_cron()
{
    global $CFG, $DB;
    $status = true;
    $emailpending = false;
    //Check for required functions...
    if (!function_exists('utf8_encode')) {
        mtrace("        ERROR: You need to add XML support to your PHP installation!");
        return true;
    }
    //Get now
    $now = time();
    //First of all, we have to see if the scheduled is active and detect
    //that there isn't another cron running
    mtrace("    Checking backup status", '...');
    $backup_config = backup_get_config();
    if (!isset($backup_config->backup_sche_active) || !$backup_config->backup_sche_active) {
        mtrace("INACTIVE");
        return true;
    } else {
        if (isset($backup_config->backup_sche_running) && $backup_config->backup_sche_running) {
            mtrace("RUNNING");
            //Now check if it's a really running task or something very old looking
            //for info in backup_logs to unlock status as necessary
            $timetosee = 1800;
            //Half an hour looking for activity
            $timeafter = time() - $timetosee;
            $numofrec = $DB->count_records_select("backup_log", "time > ? AND backuptype = ?", array($timeafter, 'scheduledbackup'));
            if (!$numofrec) {
                $timetoseemin = $timetosee / 60;
                mtrace("    No activity in last " . $timetoseemin . " minutes. Unlocking status");
            } else {
                mtrace("    Scheduled backup seems to be running. Execution delayed");
                return true;
            }
        } else {
            mtrace("OK");
            //Mark backup_sche_running
            backup_set_config("backup_sche_running", "1");
        }
    }
    //Now we get the main admin user (we'll use his timezone, mail...)
    mtrace("    Getting admin info");
    $admin = get_admin();
    if (!$admin) {
        $status = false;
    }
    //Delete old_entries from backup tables
    if ($status) {
        mtrace("    Deleting old data");
        if (!backup_delete_old_data()) {
            $errorstr = "An error occurred deleting old backup data";
            add_to_backup_log(time(), $preferences->backup_course, $errorstr, 'scheduledbackup');
            mtrace("    " . $errorstr);
        }
    }
    //Now we get a list of courses in the server
    if ($status) {
        mtrace("    Checking courses");
        //First of all, we delete everything from backup tables related to deleted courses
        mtrace("        Skipping deleted courses");
        $skipped = 0;
        if ($bckcourses = $DB->get_records('backup_courses')) {
            foreach ($bckcourses as $bckcourse) {
                //Search if it exists
                if (!($exists = $DB->get_record('course', array('id' => $bckcourse->courseid)))) {
                    //Doesn't exist, so delete from backup tables
                    $DB->delete_records('backup_courses', array('courseid' => $bckcourse->courseid));
                    $DB->delete_records('backup_log', array('courseid' => $bckcourse->courseid));
                    $skipped++;
                }
            }
        }
        mtrace("            {$skipped} courses");
        //Now process existing courses
        $courses = $DB->get_records("course");
        //For each course, we check (insert, update) the backup_course table
        //with needed data
        foreach ($courses as $course) {
            if ($status) {
                mtrace("        {$course->fullname}");
                //We check if the course exists in backup_course
                $backup_course = $DB->get_record("backup_courses", array("courseid" => $course->id));
                //If it doesn't exist, create
                if (!$backup_course) {
                    $temp_backup_course->courseid = $course->id;
                    $newid = $DB->insert_record("backup_courses", $temp_backup_course);
                    //And get it from db
                    $backup_course = $DB->get_record("backup_courses", array("id" => $newid));
                }
                //If it doesn't exist now, error
                if (!$backup_course) {
                    mtrace("            ERROR (in backup_courses detection)");
                    $status = false;
                    continue;
                }
                // Skip backup of unavailable courses that have remained unmodified in a month
                $skipped = false;
                if (!$course->visible && $now - $course->timemodified > 31 * 24 * 60 * 60) {
                    //Hidden + unmodified last month
//.........这里部分代码省略.........

 protected function prepareDir()
 {
     // 一時ディレクトリを作成して中身を空にする
     if (!check_and_create_backup_dir($this->getUnique()) || !clear_backup_dir($this->getUnique())) {
         throw new SharingCart_Exception('Preparation failure');
     }
     // 残っている古い(=4時間以上前の)バックアップデータを削除
     if (!backup_delete_old_data()) {
         throw new SharingCart_Exception('Preparation failure');
     }
 }

 public static function restoreCourse($preferences, $session)
 {
     global $Out;
     // the initial set of preferences should be enough to get the restore started.
     // once in progress the restore will obtain the preferences from the backup file
     // itself
     if (!isset($preferences)) {
         return null;
     }
     // Assumes the backup file is in the course data directory and the
     // preferences are in the backup file itself.
     global $CFG;
     // for large files uncomment following code
     //@ini_set("max_execution_time","3000");
     //raise_memory_limit("192M");
     $file = self::createBackupFilePath($preferences->course_id);
     $file .= '/' . $preferences->backup_name;
     //path to file
     //Check the file exists
     if (!is_file($file)) {
         return false;
     }
     //Check the file name ends with .zip
     if (!substr($file, -4) == ".zip") {
         return false;
     }
     //Now calculate the unique_code for this restore
     $backup_unique_code = $preferences->backup_unique_code;
     //Now check and create the backup dir (if it doesn't exist)
     $status = check_and_create_backup_dir($backup_unique_code);
     //Empty dir
     if ($status) {
         $status = clear_backup_dir($backup_unique_code);
     }
     //Now delete old data and directories under dataroot/temp/backup
     if ($status) {
         $status = backup_delete_old_data();
     }
     $tempBackupPath = synch_backup_controller::createTempBackupPath($backup_unique_code);
     //Now copy the zip file to dataroot/temp/backup/backup_unique_code
     if ($status) {
         if (!($status = backup_copy_file($file, $tempBackupPath . "/" . basename($file)))) {
             // There has been a problem. Invalid name or bad perms
             return false;
         }
     }
     //Now unzip the file
     if ($status) {
         if (!($status = restore_unzip($tempBackupPath . "/" . basename($file)))) {
             // error: Invalid zip file
             return false;
         }
     }
     //Check for Blackboard backups and convert
     if ($status) {
         require_once "{$CFG->dirroot}/backup/bb/restore_bb.php";
         $status = blackboard_convert($tempBackupPath);
     }
     // backup file has now been unpacked. Retrieve the serialized preferences
     $preferencesPath = $tempBackupPath . '/' . self::getPreferencesFileName();
     $preferences = FileSystem::unSerializeFromFile($preferencesPath);
     // Now we have the preferences from the backup we need to tailor it to our current needs
     // should we be updating an existing item or creating one.
     $dataItemId = SynchContentHierarchy::generateDataItemId($preferences->course_id, synch_view_controller::$TYPE_ID_COURSE);
     global $SynchManager, $SynchServerController;
     $itemExists = $SynchManager->getSessionItemExistsByServerId($SynchServerController->getServerId(), $session);
     if (isset($itemExists) && is_array($itemExists) && in_array($dataItemId, $itemExists)) {
         $preferences->restoreto = 1;
         $preferences->deleting = 1;
     } else {
         $preferences->restoreto = 2;
     }
     //Now check for the moodle.xml file
     if ($status) {
         $xml_file = $tempBackupPath . "/moodle.xml";
         if (!($status = restore_check_moodle_file($xml_file))) {
             if (!is_file($xml_file)) {
                 //Error checking backup file. moodle.xml not found at root level of zip file
                 return false;
             } else {
                 //Error checking backup file. moodle.xml is incorrect or corrupted.
                 return false;
             }
         }
     }
     //unpack backup file
     //read contents
     //Reading info from file
     $info = restore_read_xml_info($xml_file);
     //Reading course_header from file
     $courseHeader = restore_read_xml_course_header($xml_file);
     //Save course header and info into php session
     if ($status) {
         //$SESSION->info = $info;
         //$SESSION->course_header = $course_header;
     }
     global $restore;
     $restore = $preferences;
     $message = null;
     $restoreSuccess = restore_execute($preferences, $info, $courseHeader, $message);
//.........这里部分代码省略.........

function schedule_backup_cron()
{
    global $CFG;
    $status = true;
    $emailpending = false;
    //Check for required functions...
    if (!function_exists('utf8_encode')) {
        mtrace("        ERROR: You need to add XML support to your PHP installation!");
        return true;
    }
    //Get now
    $now = time();
    //First of all, we have to see if the scheduled is active and detect
    //that there isn't another cron running
    mtrace("    Checking backup status", '...');
    $backup_config = backup_get_config();
    if (!isset($backup_config->backup_sche_active) || !$backup_config->backup_sche_active) {
        mtrace("INACTIVE");
        return true;
    } else {
        if (isset($backup_config->backup_sche_running) && $backup_config->backup_sche_running) {
            mtrace("RUNNING");
            //Now check if it's a really running task or something very old looking
            //for info in backup_logs to unlock status as necessary
            $timetosee = 1800;
            //Half an hour looking for activity
            $timeafter = time() - $timetosee;
            $numofrec = count_records_select("backup_log", "time > {$timeafter}");
            if (!$numofrec) {
                $timetoseemin = $timetosee / 60;
                mtrace("    No activity in last " . $timetoseemin . " minutes. Unlocking status");
            } else {
                mtrace("    Scheduled backup seems to be running. Execution delayed");
                return true;
            }
        } else {
            mtrace("OK");
            //Mark backup_sche_running
            backup_set_config("backup_sche_running", "1");
        }
    }
    //Now we get the main admin user (we'll use his timezone, mail...)
    mtrace("    Getting admin info");
    $admin = get_admin();
    if (!$admin) {
        $status = false;
    }
    //Delete old_entries from backup tables
    if ($status) {
        mtrace("    Deleting old data");
        $status = backup_delete_old_data();
    }
    //Now we get a list of courses in the server
    if ($status) {
        mtrace("    Checking courses");
        //First of all, we delete everything from backup tables related to deleted courses
        mtrace("        Skipping deleted courses");
        $skipped = 0;
        if ($bckcourses = get_records('backup_courses')) {
            foreach ($bckcourses as $bckcourse) {
                //Search if it exists
                if (!($exists = get_record('course', 'id', "{$bckcourse->courseid}"))) {
                    //Doesn't exist, so delete from backup tables
                    delete_records('backup_courses', 'courseid', "{$bckcourse->courseid}");
                    delete_records('backup_log', 'courseid', "{$bckcourse->courseid}");
                    $skipped++;
                }
            }
        }
        mtrace("            {$skipped} courses");
        //Now process existing courses
        $courses = get_records("course");
        //For each course, we check (insert, update) the backup_course table
        //with needed data
        foreach ($courses as $course) {
            if ($status) {
                mtrace("        {$course->fullname}");
                //We check if the course exists in backup_course
                $backup_course = get_record("backup_courses", "courseid", $course->id);
                //If it doesn't exist, create
                if (!$backup_course) {
                    $temp_backup_course->courseid = $course->id;
                    $newid = insert_record("backup_courses", $temp_backup_course);
                    //And get it from db
                    $backup_course = get_record("backup_courses", "id", $newid);
                }
                //If it doesn't exist now, error
                if (!$backup_course) {
                    mtrace("            ERROR (in backup_courses detection)");
                    $status = false;
                    continue;
                }
                // Skip courses that do not yet need backup
                $skipped = !($backup_course->nextstarttime > 0 && $backup_course->nextstarttime < $now);
                // Skip backup of unavailable courses that have remained unmodified in a month
                if (!$skipped && !$course->visible && $now - $course->timemodified > 31 * 24 * 60 * 60) {
                    //Hidden + settings were unmodified last month
                    //Check log if there were any modifications to the course content
                    $sql = 'SELECT l.id FROM ' . $CFG->prefix . 'log l WHERE ' . 'l.course=' . $course->id . ' AND l.time>' . ($now - 31 * 24 * 60 * 60) . " AND lower(l.action) not like '%view%'";
                    $logexists = record_exists_sql($sql);
//.........这里部分代码省略.........