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聊天室php&mysql(二)

//第二页面 name="frame2.php"



<?
include "../signup/mysql.php";
header("expires: sun, 28 dec 1997 09:32:45 gmt");
header("cache-control: no-cache, must-revalidate");
header("pragma: no-cache");
header("content-type: text/html; charset=${charset}");



$current_time=time();
$delete_time=$current_time-40;
$sql="delete from chat_user where last_time<".$delete_time;
mysql_query($sql)or die(" false again");



$sql="update chat_user set last_time='$current_time' where userid='$userid'";
mysql_query($sql) or die("false");

$sql="select userid from chat_user";
$result=mysql_query($sql)or die("fallse");
$online=mysql_num_rows($result);
?>

<html>
<head>
<title>user list</title>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<meta http-equiv="refresh" content="30; url=<? echo $php_self; ?>?userid=<?echo $userid?>">

</head>


<body bgcolor="#6699ff" text="#000000">
<div id="layer1" style="position:absolute; left:9px; top:37px; width:94px; height:21px; z-index:1">  
  <div align="center"><font color="#ff9999"><b>在线人数</b></font></div>
</div>
<div id="layer2" style="position:absolute; left:14px; top:96px; width:105px; height:276px; z-index:2">  
  <p><i><font size="2" color="#ff9999">

   
  <?            
  $sql="select userid,id,sex from chat_user";
  $result=mysql_query($sql)or die("fallse");
  while($row=mysql_fetch_array($result)){

      $user=$row['userid'];
      $user="<a href='".$php_self."?userid=".$userid."' onclick=parent.bottom.user('".$row["id"]."')>".$row["id"];
      echo $user."</a>(".$row["sex"].")<br>";
  }
  ?>

    </font></i></p>
  <p> </p>
</div>
<div id="layer3" style="position:absolute; left:20px; top:62px; width:74px; height:11px; z-index:3">  
  <div align="center"><font size="2" color="#ff9999">(<?echo $online ;?>人)</font></div>
</div>
<p> </p>
<p> </p>
</body>
</html>


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