如何在php中显示mysql表的总数

Question

我正在尝试使用以下代码计算总行数：

$countvideo = "SELECT count(id) FROM `videos`";
$countvideo_run = mysqli_query($connect, $countvideo);
if($countvideo_run){
        $countvideo_result = mysql_result($countvideo_run, 0, 'count(id)');
    }

但它显示了我的错误：

  

警告：mysql_result（）要求参数1为资源，对象在第121行的C：\ xampp \ htdocs \ task \ media \ new \ adminpanel.php中给出

我怎么算这个？

Answer 1

您正在将mysqli_返回对象与不兼容的mysql_函数混合。

$countvideo = "SELECT count(id) qty FROM `videos`";
if (($result = mysqli_query($connect, $countvideo)) !== false) {
    $row = $result->fetch_assoc();
    $countvideo_result = $row['qty'];
}

Answer 2

您正在混合mysqli和mysql个功能

$countvideo = "SELECT count(id) as `total` FROM `users`";
$countvideo_run = mysqli_query($connect, $countvideo);
if ($countvideo_run) {
    $countvideo_result = $countvideo_run->fetch_object();
    $total = $countvideo_result->total;
} 

Answer 3

您使用mysql_result代替mysqli_result。