很棒的在线教学系统

源代码在线查看: delete.php

软件大小: 12697 K
上传用户: huanghuanl
关键词: 在线教学
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相关代码

								/**				 * Action for deleting a page				 *				 * @version $Id: delete.php,v 1.7.8.1 2008/10/09 11:04:12 mudrd8mz Exp $				 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License				 * @package lesson				 **/				    confirm_sesskey();								    $pageid = required_param('pageid', PARAM_INT);				    if (!$thispage = get_record("lesson_pages", "id", $pageid)) {				        error("Delete: page record not found");				    }								    // first delete all the associated records...				    delete_records("lesson_attempts", "pageid", $pageid);				    // ...now delete the answers...				    delete_records("lesson_answers", "pageid", $pageid);				    // ..and the page itself				    delete_records("lesson_pages", "id", $pageid);								    // repair the hole in the linkage				    if (!$thispage->prevpageid AND !$thispage->nextpageid) {				        //This is the only page, no repair needed				    } elseif (!$thispage->prevpageid) {				        // this is the first page...				        if (!$page = get_record("lesson_pages", "id", $thispage->nextpageid)) {				            error("Delete: next page not found");				        }				        if (!set_field("lesson_pages", "prevpageid", 0, "id", $page->id)) {				            error("Delete: unable to set prevpage link");				        }				    } elseif (!$thispage->nextpageid) {				        // this is the last page...				        if (!$page = get_record("lesson_pages", "id", $thispage->prevpageid)) {				            error("Delete: prev page not found");				        }				        if (!set_field("lesson_pages", "nextpageid", 0, "id", $page->id)) {				            error("Delete: unable to set nextpage link");				        }				    } else {				        // page is in the middle...				        if (!$prevpage = get_record("lesson_pages", "id", $thispage->prevpageid)) {				            error("Delete: prev page not found");				        }				        if (!$nextpage = get_record("lesson_pages", "id", $thispage->nextpageid)) {				            error("Delete: next page not found");				        }				        if (!set_field("lesson_pages", "nextpageid", $nextpage->id, "id", $prevpage->id)) {				            error("Delete: unable to set next link");				        }				        if (!set_field("lesson_pages", "prevpageid", $prevpage->id, "id", $nextpage->id)) {				            error("Delete: unable to set prev link");				        }				    }				    lesson_set_message(get_string('deletedpage', 'lesson').': '.format_string($thispage->title, true), 'notifysuccess');				    redirect("$CFG->wwwroot/mod/lesson/edit.php?id=$cm->id");				?>							

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