如何用PHP和mysql創建一個ShoutBox

  作爲一個PHP開發人員,我有時被要求作個shoutbox 。 如果同樣的事情也發生在你身上,這裏有一個快速指南。顯然,您要爲它添加您自己的CSS在上面,但這裏是基本思路。
  我們需要一個MySQL數據庫表和三個PHP文件。
  首先,我們需要一個文件保存數據庫信息
  --- 文件 #1:mysql.inc.php---
  <?php
  # Simply Shouting - ashoutboxexample
  # File name:mysql.inc.php
  # Description: A file to hold database info.
  $host ='localhost';
  $user ='database_user_name';
  $password='database_user_password';
  $name ='database_name';
  ?>
  創建一個有四個字段的數據表. 我們命名爲shouts. 此前可能你沒有這個SQL文件, 創建一個PHP文件"install.php". 這個文件用過一次之後,記得要刪除它!
  -- 文件 #2: install.php--
  <?php
  # Simply Shouting - ashoutboxexample
  # File name: install.php
  # Description: Creates the database table.
  // include the database info file
  include("mysql.inc.php");
  //連接數據庫
  $connection= @mysql_connect($host,$user,$password) or die(mysql_error());
  $db= @mysql_select_db($name,$connection) or die(mysql_error());
  //如果我們已經有一個表名字叫做"shouts", 需要先刪除它
  $sql='DROP TABLE IF EXISTS `shouts`';
  $result= @mysql_query($sql,$connection) or die(mysql_error());
  // 現在確定沒有相同名字的表, 創建它
  $sql='CREATE TABLE `shouts` (
   `id` int(11) NOT NULL auto_increment,
   `timestamp` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
   `shoutby` varchar(50) default NULL,
   `shout` varchar(50) default NULL,
   PRIMARY KEY `id` (`id`)
  ) TYPE=MyISAM AUTO_INCREMENT=1';
  echo'Creating table: \'shouts\'....';
  // 關閉連接
  $result= @mysql_query($sql,$connection) or die(mysql_error());?>
  <html>
  <head>
  <title>Simply Shouting - 安裝</title>
  </head>
  <body>
  <br />
  你的安裝過程已經完成. 請立即從你的服務器上刪除所有安裝文件. 本程序包含以下安裝文件:<br />
  <br />
  1) install.php<br />
  <br />
  <br />
  <!-- I could just send them to index.phpautomatically, but then they'd wonder if it created correctly or not. -->
  點擊 <a href="index.php">這裏</a>開始.</html>
  這是主文件:
  --- 文件 #3: index.php---
  <?
  # Simply Shouting - ashoutboxexample
  # File name: index.php
  # Description: Main page to display our shouts.
  //包含數據庫信息
  include_once("mysql.inc.php");
  //連接數據庫
  $connection= @mysql_connect($host,$user,$password) or die(mysql_error());
  $db= @mysql_select_db($name,$connection) or die(mysql_error());
  ?>
  <html>
  <head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8"><style type="text/css">
  <!--
  body,td,th {
   font-family: Verdana, Arial, Helvetica, sans-serif;
   font-size: 12px;
  }
  -->
  </style><body>
  <div style="width:500px;height 400px; border:thin groove #519554;">
  <?
  // 顯示最新10條留言. 首先,初始化一個計數器
  $counting=0;
  // we need a counter because I want to show our shouts in ASC order
  // (like a chat room)
  $sql=mysql_query("SELECT * FROM `shouts`");
  while($data=mysql_fetch_array($sql)){
  //counts every row
  $counting=$counting+1;
  } //end while
  // if the count comes back greater than 10, then we select the last
  // 10 shouts for display.
  if($counting>10){
  $countlessten=$counting-9;
  $sql=mysql_query("SELECT * FROM `shouts` ORDER BY `shouts`.`id` ASC LIMIT $countlessten,10");
  }else{
  //else it doesn't matter, there's less than 10!
  $sql=mysql_query("SELECT * FROM `shouts` ORDER BY `shouts`.`id` ASC LIMIT 10");
  }
  while($data=mysql_fetch_array($sql)){
  //my timestamp field in the database is basically useless to me unless
   //I parse it. The following code parses the timestamp into things I
   //can use.
  $timestamp=$data['timestamp'];
  $postedyear=substr($timestamp,0,4);
  $postedmonth=substr($timestamp,5,2);
  $postedday=substr($timestamp,8,2);
  $postedtime=substr($timestamp,11,5);
  $newpostedtime="";
  $nomilitary=substr($postedtime,0,2);
  // the hour is greater than 12, so we need to switch back to 1-12 and
   // add a "pm"
  if($nomilitary>=13){
   $nomilitary=$nomilitary-12;
   $newpostedtime=$nomilitary;
   $newpostedtime.=":";
   $newpostedtime.=substr($postedtime,3,2) ;
   $newpostedtime.=" pm";
   }
   if($newpostedtime!=""){
   $postedtime=$newpostedtime;
   }else{
   $postedtime.=" am";
   }
  //now that we have the time, let's get the shout and the shouter
  $shoutby=$data['shoutby'];
  $shout=$data['shout'];
   echo$postedmonth."/".$postedday."/".$postedyear." at ".$postedtime." - <strong>".$shoutby." said: </strong>".$shout."<br><br>";
  // looks like: 12/1/2008 at 5:02pm - Josh said: Yo Yo Yo!
  }
  //below is the HTML form for creating the shouts
  ?>
  <form id="newshout" name="newshout" action="newshout.php" method="post"><input name="shoutby" type="text" id="shoutby" onClick="javascript:this.value=''" value="Enter your name here" size="24" maxlength="50" />
  <br><br><input name="shout" type="text" id="shout" onClick="javascript:this.value=''" value="Click & Shout!" size="24" maxlength="50" />
  <br><br><input id="submit" name="submit" type="submit" value="Shout!" /></form>
  </div>
  </body>
  </html>
  最後, 我們需要一個 PHP 文件處理表單.
  -- 文件#4: newshout.php--
  <?
  # Simply Shouting - ashoutboxexample
  # File name: newshout.php
  # Description: Process the HTML form on index.phpand redirect.
  //得到留言者姓名
  $shoutby=$_POST['shoutby'];
  if($shoutby=="Enter your name here"||$shoutby==""){
  //如果沒有輸入名字
  $shoutby="Visitor";
  }
  if($_POST['shout']){
  // 留言信息
  if($_POST['shout'] !="Click & Shout!"){
   //they didn't shout the default, so continue processing
   $shout=$_POST['shout'];
   //替換掉"<"和">"以阻止黑客
   $shout=str_replace("<"," ",$shout);
   $shout=str_replace(">"," ",$shout);
   // 包含數據信息
   include_once("dbaccess.php");
  
   // 連接數據庫
   $connection= @mysql_connect($host,$user,$password) or die(mysql_error());
   $db= @mysql_select_db($name,$connection) or die(mysql_error());
  
   // 插入留言信息到數據庫
   $sql="INSERT INTO `shouts`(`shoutby`,`shout`) VALUES('$shoutby','$shout')";
  //關閉連接
  $result= @mysql_query($sql,$connection);
   }
  }
  ?>
  <html>
  <head>
  </head>
  <body onLoad="window.open('index.php','_self')">
  </body>
  </html>