C:/xampp/htdocs/moodle/lib/dtl/file_xml_database_exporter.php

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<?php

// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.


defined('MOODLE_INTERNAL') || die();

class file_xml_database_exporter extends xml_database_exporter {
    protected $filepath;
    protected $file;

    public function __construct($filepath, moodle_database $mdb, $check_schema=true) {
        parent::__construct($mdb, $check_schema);
        $this->filepath = $filepath;
    }

    protected function output($text) {
        fwrite($this->file, $text);
    }

    public function export_database($description=null) {
        // TODO: add exception if file creation fails
        $this->file = fopen($this->filepath, 'wb');
        parent::export_database($description);
        fclose($this->file);
    }
}