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如何用PHP和mysql創建一個ShoutBox

2008-12-22 08:10:14  編輯來源:互聯網  简体版  手機版  評論  字體: ||
 
  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>
 
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>
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