php - 显示总注册用户

Question

我试图在我的页面上显示注册用户总数。我正在使用这个:

<?php
//connect to db
require_once('connect.php');

$usrcnt = mysql_query("SELECT COUNT(DISTINCT ID) FROM members");
$res = mysql_num_rows($usrcnt);

$cnt_mbrs = mysql_fetch_array($res);
?>

然后我在我的页面中调用了 $cnt_mbrs 但我得到了如下错误:

mysql_num_rows(): supplied argument is not a valid MySQL result resource...

我这样做是正确的吗？

Answer 1

$usrcnt = mysql_query("SELECT COUNT(*) as cnt FROM members");
$res = mysql_fetch_array($usrcnt);
$cnt_mbrs = $res ['cnt']

更正确。