<?php
$online_no=isset($_POST['online_no'])?$_POST['online_no']:'';
if (!empty($online_no))
{
mysql_connect('localhost','project','project');
mysql_select_db('test');
$sql="update online set online_no={$online_no}";
if ($query=mysql_query($sql))
{
echo "当前在线人数:".$online_no;
}
}
else
{
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>add</title>
</head>
<body>
<form action="add.php" method="post">
添加在线数:<input name="online_no" type="text" />
<input name="submit" type="submit" value="提交" />
</form>
</body>
</html>
<?php
}
?>
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