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PHP3 入门教程MySQL 数据库界面

Jun 21, 2016 am 09:02 AM
email mysql nbsp print

 

下面的内容就是如何用 PHP3.0 MySQL 来构造数据库 Web 应用。
  
  
   下面这些涉及到 MySQL 的功能,都必须在服务器上安装调试好 MySQL 之后才能够运行。如果你对 MySQL 还不是很熟,那么最好先看看有关的文章。
  
  
   PHP 在数据库服务器和 Web 浏览器之间,扮演了一个中间人的角色,把一方的命令解释后传给另一方,而后在把取得的结果传回来。正是由于这种沟通的可能性,使得许多任务得以实现。比如网上调查,在线购物,个人化站点等等,无不借助于这种技术。
  
  
   这种交互从向 MySQL 数据库建立一个连接开始,连接用下面的这个命令来实现:
  
  
   语法 : int mysql_connect(string hostname, string username, string password);
  
  
   * hostname - 数据库服务器所在的主机名
  
  
   * username - 用来连接到 MySQL 数据库的用户名。
  
  
   * Password - 用户相应的口令。
  
  
   * 返回的整形值,也就是一个连接号。当连接号是正数的时候表示连接成功,而负数者表示连接失败。
  
  
   同样的,所有的这些命令都必须置于“ ”之间。
  
  
   再回到我们的用户信息的处理上来。在执行了下面几条命令后,将在 MySQL 数据库中建立起了一个 information 表:
  mysql> CREATE TABLE information (
  -> name VARCHAR (25),
  -> email VARCHAR (25),
  -> choice VARCHAR (8) );
  
  
  
   现在,如果我们想向表中插入一些用户信息,我们可以修改刚才的 email.php3 脚本:
  
  
  
  /*
这段脚本用来处理从 moreinfo.html 文件传过来的变量 */
  
  /*
定义一些相关的变量 */
  
  $hostname = "devshed";
  $username = "myusername";
  $password = "mypassword";
  $dbName = "mydbname";
  
  /*
用来储存用户数据的 MySQL */
  $userstable = "information";
  
  /*
站点主管的 email 地址 */
  $adminaddress = "administration@buy.com";
  
  /*
建立与数据库的连接 */
  MYSQL_CONNECT($hostname,$username,$password) OR DIE("Unable to connect to database");
  
  @mysql_select_db("$dbName") or die("Unable to select database");
  
  PRINT "";
  PRINT "
您好 , $name.";
  PRINT "";
  PRINT "
谢谢您的参与 ";
  PRINT "
我们将向 $email 发出验证信息 ";
  PRINT "";
  
  /*
发送相关的邮件 */
  mail("$email", "Your request for information",
  "$name\nThank you for your interest!\n
  We sell fresh corn daily over the Internet!
  Place your order at http://www.buy.com,
  and receive a free package of $preference!");
  
  mail("$adminaddress",
  "Visitor request for info.",
  "$name requested for information.\n
  
  The email address is $email. \n The visitor prefers $preference.");
  
  /*
把信息插入到表中 */
  $query = "INSERT INTO $userstable VALUES('$name','$email', '$preference')";
  
  $result = MYSQL_QUERY($query);
  
  PRINT "
您的信息已经被插入到我们的数据库中了,我们将能给您带来更好的服务。 ";
  
  /*
关闭数据库连接 */
  MYSQL_CLOSE();
  ?>
  
  



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