C:/xampp/htdocs/moodle/mod/wiki/history.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/>.

require_once('../../config.php');

require_once($CFG->dirroot . '/mod/wiki/lib.php');
require_once($CFG->dirroot . '/mod/wiki/locallib.php');
require_once($CFG->dirroot . '/mod/wiki/pagelib.php');

$pageid = required_param('pageid', PARAM_TEXT);
$paging = optional_param('page', 0, PARAM_INT);
$allversion = optional_param('allversion', 0, PARAM_INT);

if (!$page = wiki_get_page($pageid)) {
    print_error('incorrectpageid', 'wiki');
}

if (!$subwiki = wiki_get_subwiki($page->subwikiid)) {
    print_error('incorrectsubwikiid', 'wiki');
}

if (!$wiki = wiki_get_wiki($subwiki->wikiid)) {
    print_error('incorrectwikiid', 'wiki');
}

if (!$cm = get_coursemodule_from_instance('wiki', $wiki->id)) {
    print_error('invalidcoursemodule');
}

$course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);

require_login($course->id, true, $cm);
$context = get_context_instance(CONTEXT_MODULE, $cm->id);
require_capability('mod/wiki:viewpage', $context);
add_to_log($course->id, 'wiki', 'history', 'history.php?id=' . $cm->id, $wiki->id);

$wikipage = new page_wiki_history($wiki, $subwiki, $cm);

$wikipage->set_page($page);
$wikipage->set_paging($paging);
$wikipage->set_allversion($allversion);

$wikipage->print_header();
$wikipage->print_content();

$wikipage->print_footer();