如何用PHP和mysql建立一個ShoutBox

日期:2008-06-26  作者:喜騰小二  來源:PHPChina


作為一個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妳身上，這裡有一個快速指南。顯然，您要為它新增您自己的CSS在上麵，但這裡是基本思路。  
我們需要一個MySQL資料庫表和三個PHP檔案。
首先，我們需要一個檔案儲存資料庫資訊

--- 檔案 #1: mysql.inc.php ---

php
# Simply Shouting - a shoutbox example
# 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';
?>

建立一個有四個欄位的資料表. 我們命名為shouts. 此前可能妳沒有這個SQL檔案, 建立一個PHP檔案"install.php". 這個檔案用過一次之後，記得要移除它！

-- 檔案 #2: install.php --

php
# Simply Shouting - a shoutbox example
# File name: install.php
# Description: Creates the database table.

// include the database info file
include("mysql.inc.php");

//連線資料庫

$connection = @mysql_connect($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", 需要先移除它
$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, 建立它
$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 DEFAULT CHARSET=UTF8 AUTO_INCREMENT=1' ;
echo 'Creating table: 'shouts'....';
// 關閉連線
$result = @mysql_query($sql,$connection) or die(mysql_error()); ?>


Simply Shouting - 安裝



妳的安裝過程已經完成.  請立即從妳的伺服器上移除所有安裝檔案.  本套裝程式含以下安裝檔案:


1) install.php



 
按 php">這裡開始.

 這是主檔案:

--- 檔案 #3: index.php ---

# Simply Shouting - a shoutbox example
# File name: index.php
# Description: Main page to display our shouts.

//包含資料庫資訊
include_once("mysql.inc.php");
//連線資料庫
$connection = @mysql_connect($host, $user, $password) or die(mysql_error());
$db = @mysql_select_db($name,$connection) or die(mysql_error());
?>




// 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 ." - " . $shoutby . " said: " . $shout . "

";
  // looks like: 12/1/2008 at 5:02pm - Josh said: Yo Yo Yo!
}
//below is the HTML form for creating the shouts
?>









最後, 我們需要一個 PHP 檔案處理表單.

-- 檔案#4: newshout.php --

# Simply Shouting - a shoutbox example
# File name: newshout.php
# Description: Process the HTML form on index.php and 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']){
  // 留言資訊 
  if($_POST['shout'] != "Click & Shout!"){
    //they didn't shout the default, so continue processing
    $shout = $_POST['shout'];
    //取代掉"<"和">"以阻止駭客 
    $shout = str_replace("<", " ", $shout);
    $shout = str_replace(">", " ", $shout);
    // 包含資料資訊    
    include_once("dbaccess.php");
   
    // 連線資料庫
    $connection = @mysql_connect($host, $user, $password) or die(mysql_error());
    $db = @mysql_select_db($name,$connection) or die(mysql_error());
   
    //  插入留言資訊到資料庫 
    $sql = "INSERT INTO `shouts`(`shoutby`,`shout`) VALUES('$shoutby','$shout')";
//關閉連線
$result = @mysql_query($sql,$connection);
  }
}
?>



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