如何使用PHP在线显示用户？

Question

无论有多少在线用户，此代码仅显示“ 1个在线用户”。 我该如何解决？

<?php
$con = mysqli_connect($host, $username, $password , $database)
or die('Error connecting to MySQL server.'); 
$online = "1";
$query = "SELECT * FROM `users` WHERE online = '$online'";
$data = mysqli_query($con, $query);
$row = mysqli_fetch_array($data);
$online=$row['online'];
echo '<div id="online-me" class="mydiv3"><center><span id="stats">'.$online.' User(s) Online!</span> </center></div>';
?>

Answer 1

所以用

$query = "SELECT * FROM `users` WHERE online = '$online'";

您将获得online = 1的行。 然后设置$online=$row['online']; 无论如何，它只会将$online设置$online 1 。

那应该使您知道如何解决它。 干杯! 祝好运！

Answer 2

使用MySql的count（）还使用mysqli_fetch_assoc代替mysqli_fetch_array

像这样的东西

<?php
$con = mysqli_connect($host, $username, $password , $database)
or die('Error connecting to MySQL server.'); 
$online = "1";
$query = "SELECT count(id) as 'total' FROM `users` WHERE online = '$online'";
$data = mysqli_query($con, $query);
$row = mysqli_fetch_assoc($data);
$online=$row['total'];
echo '<div id="online-me" class="mydiv3"><center><span id="stats">'.$online.' User(s) Online!</span> </center></div>';
?>