简单 BBS 系统 需 MySQL。
     以下是BBS的表结构，用以下的语句就可以建立：   

        CREATE TABLE bbsMessage
        (
            ID INT NOT NULL AUTO_INCREMENT,
            Title VARCHAR(64),
            Poster VARCHAR(64),
            Created DATETIME,
            Parent INT,
            Body BLOB,
            PRIMARY KEY(ID)
        );

     /******************************************************
     BBS v1.0
     编码： PHP 3   
     作者： Leon Atkinson
    
     简单 BBS 系统 需 MySQL。
     以下是BBS的表结构，用以下的语句就可以建立：   

        CREATE TABLE bbsMessage
        (
            ID INT NOT NULL AUTO_INCREMENT,
            Title VARCHAR(64),
            Poster VARCHAR(64),
            Created DATETIME,
            Parent INT,
            Body BLOB,
            PRIMARY KEY(ID)
        );

    *******************************************************/

    printf( "

Leon's BBS

\n");

     /* 设置数据库 */
    mysql_pconnect( "www.yoursever.com",  "httpd");
    $Database =  "yourdb";

     /****************************************************************
     一个吐出派生信息的递归函数
    ****************************************************************/
    function showMessages($parentID)
    {
        global $Database;

        $dateToUse = Date( "U");

        echo  "

\n";

         /* 显示所有的类别 */         
        $Query =  "SELECT * FROM bbsMessage ";
        $Query = $Query .  "WHERE Parent=$parentID ";
        $Query = $Query .  "ORDER BY Created ";

        $result = mysql($Database,$Query);
        $numRows = mysql_NumRows($result);
        $RowCount = 0;
        while($RowCount         {
            $messageID = mysql_result($result,$RowCount, "ID");
            $messageTitle = mysql_result($result,$RowCount, "Title");
            $messageCreated = mysql_result($result,$RowCount, "Created");
            $messageParent = mysql_result($result,$RowCount, "Parent");

             /*显示一行是什么类别的信息 */     
            printf( "

• ($messageCreated) $messageTitle
  \n");
      
               /* 调用 getWingContents 以得到它的分支 */
              showMessages($messageID);

              $RowCount++;
          }

          echo  "

\n";
    }

     /****************************************************************
     输出一个提交新信息的表单，并在其中预置一个父ID
    ****************************************************************/
    function postForm($parentID, $useTitle)
    {
        printf( "

\n");
        printf( "");
        printf( "");
        printf( "\n");
        printf( "");
        printf( "\n");
        printf( "");
        printf( "\n");
        printf( "\n");
        printf( "\n");
        printf( "

Title
Poster
");         printf( "

\n");
        printf( "

\n");

    }

     /******************************************************
    执行动作
    ******************************************************/
    if($ACTION !=  "")
    {
        if($ACTION ==  "POST")
        {
            $inputTitle = ereg_replace( "'",  "''", $inputTitle);
            $inputBody = ereg_replace( "'",  "''", $inputBody);

            $Query =  "INSERT INTO bbsMessage ";
            $Query .=  "VALUES(0, '$inputTitle', ";
            $Query .=  "'$inputPoster', ";
            $Query .=  "now(), $inputParent, ";
            $Query .=  "'$inputBody')";
    
            $result = mysql($Database,$Query);

        }

    }

     /******************************************************
     显示信息或者是显示信息列表
    ******************************************************/
    if($messageID > 0)
    {
        $Query =  "SELECT * FROM bbsMessage ";
        $Query = $Query .  "WHERE ID=$messageID ";

        $result = mysql($Database,$Query);
        $numRows = mysql_NumRows($result);
        $RowCount = 0;
        if($RowCount         {
            $messageID = mysql_result($result,$RowCount, "ID");
            $messageTitle = mysql_result($result,$RowCount, "Title");
            $messagePoster = mysql_result($result,$RowCount, "Poster");
            $messageCreated = mysql_result($result,$RowCount, "Created");
            $messageParent = mysql_result($result,$RowCount, "Parent");
            $messageBody = mysql_result($result,$RowCount, "Body");

            printf( "

\n");
            printf( "\n");
            printf( "\n");
            printf( "\n");
            printf( "\n");
            printf( "

Title	$messageTitle
Poster	$messagePoster
Posted	$messageCreated
$messageBody

\n");

            postForm($messageID,  "RE: $messageTitle");

        }
        

        echo  "List of Messages
";

    }
    else
    {
        printf( "

List of Messages

\n");

         /* 调用递归函数*/
        showMessages(0);

        postForm(0,  "");

    }

?>