[phpstudy]php 简单留言板教程二

【www.bbyears.com--留言】

好了现在我们来看login.php文件的程序代码吗.

 session_start();
 include("global.php");
 
 if(isset($_POST["username"]) && isset($_POST["pwd"]))
 {
  $result = mysql_query("SELECT * FROM xx_admin");
  if($info = mysql_fetch_array($result))
  {
   if($_POST["username"] == $info["username"] && $info["password"] == md5($_POST["pwd"]))
   {
    $_SESSION[user] = $info["username"];
    echo("login OK!");
    die("<script>window.location.href="index.php";</script>");
   }
   else echo("<script>window.alert("登陆失败！");window.location.href="".$_SERVER["PHP_SELF"]."";</script>");
  }
 }
?>

 session_start();
 include("global.php");
 if(!$_SESSION[user])
  die("<script>window.alert("请先登陆！");window.location.href="login.php";</script>");
 
 if(isset($_GET["act"]) && $_GET["act"]=="reply")
 {
  
  $content = $_POST["reply"];
  $content = str_replace(""," ",$content);
  $content = str_replace(" "," ",$content);
  $content = str_replace("\n","
",$content);
     $sql = "UPDATE xx_guestbook SET reply = "{$content}",replytime = "".date("Y-m-d H:i:s")."" WHERE mid = ".intval($_GET["mid"]);
     //echo $sql;
     $row=mysql_query($sql);
  if($row)
  {
   echo("reply OK!");
   die("<script>window.location.href="lyb.php";</script>");
  }
  else echo("false");
     
 }else
 
 if(isset($_GET["act"]) && $_GET["act"] == "edit")
 {
  if(isset($_GET["mid"]))
  {
   $mid = intval($_GET["mid"]);
   $row=mysql_query("SELECT * FROM xx_guestbook WHERE mid = {$mid}");
   if($row)
   {
    $rs=mysql_fetch_array($row);
    //print_r($rs); DEBUG
    //echo "";
    $reply = $rs["reply"];
    $reply = str_replace("
","\n",$reply);
    //$reply = str_replace(" ","",$reply);
    //$reply = str_replace(" ","",$content);
    //$reply = str_replace("
","",$reply);
   }
   else echo("false");
  }
 
 
?> 

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