create database bookmarks;use bookmarks;create table user  (  username varchar(16) primary key,  passwd char(40) not null,  email varchar(100) not null);create table bookmark (  username varchar(16) not null,  bm_URL varchar(255) not null,  index (username),  index (bm_URL));grant select, insert, update, deleteon bookmarks.*to [email protected] identified by 'password';

4、实现基本的网站

<?php/** * @author switch * @copyright 2015 * 包含系统登录表单的页面 */    //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('bookmark_fns.php');   //应用程序的包含文件集合        do_html_header(''); //HTML标题        display_site_info();//HTML站点信息    display_login_form();//HTML登录信息        do_html_footer();   //HTML页脚?>

4.2 bookmark_fns.php

<?php/** * @author switch * @copyright 2015 * 应用程序的包含文件集合 */    //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('data_valid_fns.php'); //确认用户输入数据有效的函数    require_once('db_fns.php'); // 连接数据库的函数    require_once('user_auth_fns.php');  //用户身份验证的函数    require_once('output_fns.php'); //以HTML形式格式化输出的函数    require_once('url_fns.php');    //增加和删除书签的函数?>

5、实现用户身份验证

<?php/** * @author switch * @copyright 2015 * 系统中用户注册表单 */    //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('bookmark_fns.php');    do_html_header('User Registration');    //HTML标题        display_registeration_form();   //输出注册表单        do_html_footer();   //HTML页脚?>

5.2 register_new.php

<?php/** * @author switch * @copyright 2015 * 处理新注册信息的脚本 */    //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('bookmark_fns.php');        //创建变量    $email = $_POST['email'];    $username = $_POST['username'];    $passwd = $_POST['passwd'];    $passwd2 = $_POST['passwd2'];    //开启会话    session_start();        try    {        //检查表单是否填写满        if(!filled_out($_POST))        {            throw new exception('You have not filled the form out correctly - please go back and try again.');        }                //检查邮件地址是否有效        if(!valid_email($email))        {            throw new exception('That is not a vald email address. Please go back try again.');        }                //检查两次输入密码是否相同        if($passwd != $passwd2)        {            throw new exception('The passwords you entered do not match - please go back try again.');        }                //检查密码长度是否合格        if((strlen($passwd) < 6) || (strlen($passwd) > 16))        {            throw new exception('Your password must be between 6 and 16 characters Please go back and try again.');        }                //尝试注册        register($username,$email,$passwd);                //注册会话变量        $_SESSION['valid_user'] = $username;                //提供成员页面链接        do_html_header('Registration successful');  //HTML标题        echo 'Your registration was successful.Go to the members page to start setting up your bookmarks!'; //输出URL        do_html_URL('member.php','Go to members page'); //HTML页脚        do_html_footer();   //HTML页脚    }    catch(exception $e)    {        do_html_header('Problem:');        echo $e->getMessage();        do_html_footer();        exit;    }?>

5.3 member.php

<?php/** * @author switch * @copyright 2015 * 用户的主页面，包含该用户所有的当前书签 */    //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('bookmark_fns.php');    session_start();        //创建变量    $username = @$_POST['username'];    $passwd = @$_POST['passwd'];        if($username && $passwd)    {        try        {            login($username,$passwd);            //如果该用户在数据库中，则注册会话变量            $_SESSION['valid_user'] = $username;        }        catch(exception $e)        {            //登录不成功            do_html_header('Problem:');            echo 'You could not be logged in. You must be logged in to view this page.';            do_html_URL('login.php','Login');            do_html_footer();            exit;        }    }        do_html_header('Home');    check_valid_user();        //获取用户的书签    if($url_array = get_user_urls($_SESSION['valid_user']))        display_user_urls($url_array);    //获取用户菜单选项    display_user_menu();    do_html_footer();?>

5.4 logout.php

<?php/** * @author switch * @copyright 2015 * 将用户注销的脚本 */    //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('bookmark_fns.php');    session_start();    $old_user = $_SESSION['valid_user'];        //注销会话变量    unset($_SESSION['valid_user']);    $result_dest = session_destroy();        do_html_header('Logging Out');        if(!empty($old_user))    {        if($result_dest)    //登出成功        {            echo 'Logged out.<br />';            do_html_URL('login.php','Login');        }        else    //不成功        {            echo 'Could not log you out.<br />';        }    }    else    {        echo 'You were not logged in, and so have not been logged ot.<br />';        do_html_URL('login.php','Login');    }    do_html_footer();?>

5.5 change_passwd.php

<?php/** * @author switch * @copyright 2015 * 修改数据库中用户密码的表单 */    //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('bookmark_fns.php');    session_start();    do_html_header('Changing password');        //创建变量    $old_passwd = $_POST['old_passwd'];    $new_passwd = $_POST['new_passwd'];    $new_passwd2 = $_POST['new_passwd2'];        try    {        check_valid_user();        if(!filled_out($_POST))            throw new exception('You have not filled out the form completely.Please try again.');                if($new_passwd != $new_passwd2)            throw new exception('Passwords entered were not the same. Not changed.');                    if((strlen($new_passwd) > 16) || (strlen($new_passwd) < 6))        {            throw new exception('New password must be between 6 and 16 characters. Try again.');        }                //尝试修改        change_password($_SESSION['valid_user'],$old_passwd,$new_passwd);        echo 'Password changed.';    }    catch(exception $e)    {        echo $e ->getMessage();    }    display_user_menu();    do_html_footer();?>

5.6 forgot_paswd.php

<?php/** * @author switch * @copyright 2015 * 重新设置遗忘密码的脚本 */    //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('bookmark_fns.php');    do_html_header("Resetting password");        //创建变量    $username = $_POST['username'];        try    {        $passwd = reset_password($username);        notify_password($username,$passwd);        echo 'Your new password has been emailed to you.<br />';    }    catch(exception $e)    {        echo 'Your password could not be reset - please try again later.';    }    do_html_URL('login.php','Login');    do_html_footer();?>

6、实现书签的存储和检索

6.1 add_bms.php

<?php/** * @author switch * @copyright 2015 * 添加书签的表单 */    //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('bookmark_fns.php');    session_start();        //创建变量    $new_url = $_POST['new_url'];        do_html_header('Adding bookmarks');        try    {        check_valid_user(); //检查用户有效性        if(!filled_out($new_url))   //检查表单是否填写            throw new exception('Form not completely filled out.');        if(strstr($new_url,'http://') === false)            $new_url = 'http://'. $new_url;        if(!(@fopen($new_url,'r'))) //可以调用fopen()函数打开URL，如果能打开这个文件，则假定URL是有效的            throw new exception('Not a valid URL.');        add_bm($new_url);   //将URL添加到数据库中        echo 'Bookmark added.';        if($url_array = get_user_urls($_SESSION['valid_user']))            display_user_urls($url_array);    }    catch(exception $e)    {        echo $e ->getMessage();    }    display_user_menu();    do_html_footer();?>

6.2 delete_bms.php

<?php/** * @author switch * @copyright 2015 * 从用户的书签列表中删除选定书签的脚本呢 */    //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('bookmark_fns.php');    session_start();        //创建变量    $del_me = @$_POST['del_me'];    $valid_user = $_SESSION['valid_user'];        do_html_header('Deleting bookmarks');    check_valid_user();        if(!filled_out($del_me))    //    {        echo '<p>You have not chosen any bookmarks to delete.<br />Please try again.</p>';        display_user_menu();        do_html_footer();        exit;    }    else    {        if(count($del_me) > 0)        {            foreach($del_me as $url)            {                if(delete_bm($valid_user,$url))                {                    echo 'Deleted '. htmlspecialchars($url) .'.<br />';                }                else                {                    echo 'Could not delete '. htmlspecialchars($url) .'.<br />';                }            }        }        else        {            echo 'No bookmarks selected for deletion';        }    }    if($url_array = get_user_urls($valid_user))    {        display_user_urls($url_array);    }    display_user_menu();    do_html_footer();?>

6.3 recommend.php

<?php/** * @author switch * @copyright 2015 * 基于用户以前的操作，推荐用户可能感兴趣的书签 */    //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('bookmark_fns.php');    session_start();    do_html_header('Recommending URLs');    try    {        check_valid_user();        $urls = recommend_urls($_SESSION['valid_user']);        display_recommended_urls($urls);    }    catch(exception $e)    {        echo $e ->getMessage();    }    display_user_menu();    do_html_footer();?>

7、源代码

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