PHP实例：PHP在线书签系统分享

PHP教程
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, delete 
on bookmarks.* 
to bm_user@localhost identified by 'password'; 

PHP教程
<?php 
 
/** 
 * 包括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括过,如果是则不会再次包括. 
  require_once('bookmark_fns.php');  //应用程序的包括文件集合 
   
  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 
?> 

PHP教程
<?php 
 
/** 
 * 应用程序的包括文件集合 
 */ 
  //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括过,如果是则不会再次包括. 
  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 
?> 

PHP教程
<?php 
 
/** 
 * 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括过,如果是则不会再次包括. 
  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 
?> 

PHP教程
<?php 
 
/** 
 * 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.'); 
    } 
     
    //检查两次输入暗码是否相同 
    if($passwd != $passwd2) 
    { 
      throw new exception('The passwords you entered do not match - please go back try again.'); 
    } 
     
    //检查暗码长度是否合格 
    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; 
  } 
?> 

PHP教程
<?php 
 
/** 
 * 用户的主页面,包括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括过,如果是则不会再次包括. 
  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(); 
?> 

PHP教程
<?php 
 
/** 
 * 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括过,如果是则不会再次包括. 
  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(); 
?> 

PHP教程
<?php 
 
/** 
 * 修改数据库中用户暗码的表单 
 */ 
  //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(); 
?> 

PHP教程
<?php 
 
/** 
 * 重新设置遗忘暗码的脚本 
 */ 
  //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(); 
?> 

PHP教程
<?php 
 
/** 
 * 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括过,如果是则不会再次包括. 
  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(); 
?> 

PHP教程
<?php 
 
/** 
 * 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括过,如果是则不会再次包括. 
  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(); 
?>