时间:2021-07-01 10:21:17 帮助过:13人阅读
7、实现一个管理界面
登录界面
由以下代码实现:
7.1 admin.php
<?php /** * @author switch * @copyright 2015 * 主管理菜单 */ //require_once语句和require语句完全相同,唯一区别是PHP会检查该文件是否已经被包含过,如果是则不会再次包含。 require_once('book_sc_fns.php'); session_start(); if((@$_POST['username']) && (@$_POST['passwd'])) //尝试登陆 { $username = $_POST['username']; $passwd = $_POST['passwd']; if(login($username,$passwd)) { $_SESSION['admin_user'] = $username; } else { do_html_header("Problem:"); echo "You could not be logged in.
"; do_html_URL('login.php','Login'); do_html_footer(); exit; } } do_html_header("Administration"); if(check_admin_user()) { display_admin_menu(); } else { echo "
You must be logged in to view this page.You are not authorized to enter the administration area.
"; do_html_URL('login.php','Login'); } do_html_footer(); ?>
7.2 user_auth_fns.php文件中的函数login()
function login($username,$password) //登录 { $conn = db_connect(); //连接数据库 if(!$conn) return 0; //检查用户名唯一性 $query = "select * from admin where username='". $username ."' and password = sha1('". $password ."')"; $result = $conn ->query($query); if(!$result) return 0; if($result ->num_rows > 0) return 1; else return 0; }
7.3 user_auth_fns.php文件中的函数check_admin_user()
function check_admin_user() //检查是否是管理员 { if(isset($_SESSION['admin_user'])) return true; else return false; }
管理主界面
由以下代码实现:
7.4 output_fns.php文件中的函数display_admin_menu()
function display_admin_menu() //输出管理员菜单 { ?>
目录添加
目录添加成功
目录页中可以看出多了Novel目录
由以下代码实现:
7.5 insert_category_form.php
<?php /** * @author switch * @copyright 2015 * 允许管理员向数据库中添加一个目录的表格 */ //require_once语句和require语句完全相同,唯一区别是PHP会检查该文件是否已经被包含过,如果是则不会再次包含 require_once('book_sc_fns.php'); session_start(); do_html_header(); if(check_admin_user()) { display_category_form(); do_html_URL("admin.php","Back to administrtion menu"); } else { echo "You are not authorized to enter the administation area.
"; } do_html_footer(); ?>
7.6 insert_category.php
<?php /** * @author switch * @copyright 2015 * 向数据库中插入新目录 */ //require_once语句和require语句完全相同,唯一区别是PHP会检查该文件是否已经被包含过,如果是则不会再次包含 require_once('book_sc_fns.php'); session_start(); do_html_header("Adding a category"); if(check_admin_user()) { if(filled_out($_POST)) { $catname =$_POST['catname']; if(insert_category($catname)) { echo "Category \"". $catname ."\" was added to the database.
"; } else { echo "Category \"". $catname ."\" could not be added to the database.
"; } } else { echo "You have not filled out the form. Please try again.
"; } do_html_URL("admin.php","Back to administration menu"); } else { echo "You are not authorised to view this page.
"; } do_html_footer(); ?>
管理员目录界面
目录编辑界面-可更新,删除
目录更新成功
目录主界面可以看到该目录更改成功
由以下代码实现:
7.7 edit_category_form.php
<?php /** * @author switch * @copyright 2015 * 管理员编辑目录的表单 */ //require_once语句和require语句完全相同,唯一区别是PHP会检查该文件是否已经被包含过,如果是则不会再次包含。 require_once('book_sc_fns.php'); session_start(); do_html_header("Edit category"); if(check_admin_user()) { if($catname = get_category_name($_GET['catid'])) { $catid = $_GET['catid']; $cat = compact('catname','catid'); display_category_form($cat); } else { echo "Could not retrieve category details.
"; } do_html_URL("admin.php","Back to administration menu"); } else { echo "You are not authorized to enter the administration area.
"; } do_html_footer(); ?>
7.8 edit_category.php
<?php /** * @author switch * @copyright 2015 * 更新数据库中的目录 */ //require_once语句和require语句完全相同,唯一区别是PHP会检查该文件是否已经被包含过,如果是则不会再次包含。 require_once('book_sc_fns.php'); session_start(); do_html_header("Updating category"); if(check_admin_user()) { if(filled_out($_POST)) { if(update_category($_POST['catid'],$_POST['catname'])) { echo "Category was updated.
"; } else { echo "Category could not be updated.
"; } } else { echo "you have not filled out the form. Please try again.
"; } do_html_URL("admin.php","Back to administration menu"); } else { echo "You are not authorised to view this page.
"; } do_html_footer(); ?>
7.9 admin_fns.php
<?php /** * @author switch * @copyright 2015 * 管理脚本使用的函数集合 */ function display_category_form($category = '') //显示目录表单 { //如果传入存在目录,进入编辑模式 $edit = is_array($category); ?> <?php if($edit) //允许删除存在目录 { echo ""; } ?> <?php } function display_book_form($book = '') //显示图书表单 { //如果传入图书存在,进入编辑模式 $edit = is_array($book); ?> <?php if ($edit) { echo " "; } ?> <?php } function display_password_form() //显示更改密码表单 { ?>
<?php } function insert_category($catname) //目录插入 { $conn = db_connect(); //数据库连接 $query = "select * from categories where catname='". $catname ."'"; $result = $conn ->query($query); if((!$result) || ($result ->num_rows != 0)) return false; $query = "insert into categories values ('','". $catname ."')"; $result = $conn ->query($query); if(!$result) return false; else return true; } function insert_book($isbn,$title,$author,$catid,$price,$description) //图书插入 { $conn = db_connect(); //连接数据库 $query = "select * from books where isbn='". $isbn ."'"; $result = $conn ->query($query); if((!$result) || ($result ->num_rows != 0)) return false; $query = "insert into books values ('". $isbn ."','". $author ."','". $title ."', '". $catid ."','". $price ."','". $description ."')"; $result = $conn ->query($query); if(!$result) return false; else return true; } function update_category($catid,$catname) //更改目录名称 { $conn = db_connect(); //连接数据库 $query = "update categories set catname='". $catname ."' where catid='". $catid ."'"; $result = @$conn ->query($query); if(!$result) return false; else return true; } function update_book($oldisbn,$isbn,$title,$author,$catid,$price,$description) { $conn = db_connect(); //连接数据库 $query = "update books set isbn='". $isbn ."', title='". $title ."', author='". $author ."', catid='". $catid ."', price ='". $price ."', description='". $description ."' where isbn='". $oldisbn ."'"; $result = @$conn ->query($query); if(!$result) return false; else return true; } function delete_category($catid) //删除目录 { $conn = db_connect(); //连接数据库 $query = "select * from books where catid='". $catid ."'"; $result = @$conn ->query($query); if((!$result) || (@$result ->num_rows > 0)) //如果该目录有图书,无法删除该目录 return false; $query = "delete from categories where catid='". $catid ."'"; $result = @$conn ->query($query); if(!$result) return false; else return true; } function delete_book($isbn) //删除图书 { $conn = db_connect(); //连接数据库 $query = "delete from books where isbn='". $isbn ."'"; $result = @$conn ->query($query); if(!$result) return false; else return true; } ?>
7.10 目录删除操作,图书添加,更新,删除操作基本与上述操作差不多,这里就不在演示,可以下载代码查看
8、扩展
本项目创建了一个相当简单的PHP购物车系统。我们还可以对它进行许多改进和提高:
以上就是php实现购物车功能的全部代码,希望对大家的学习有所帮助。
源码下载:购物车